acetic anhydrides

Summary

Summary: Compounds used extensively as acetylation, oxidation and dehydrating agents and in the modification of proteins and enzymes.

Top Publications

  1. Kaiya T, Tanaka H, Kohda K. Formation of 2'-deoxy-2-nitroadenosines by reaction of 2'-deoxyadenosines with copper(II) nitrate/acetic anhydride. Nucleosides Nucleotides Nucleic Acids. 2002;21:427-33 pubmed
    ..3H2O/Ac2O was examined. Nitration proceeded at the 2-position, although the yield was low. Removal of the acetyl groups gave 2'-deoxy-2-nitroadenosine derivatives. ..
  2. Kusakiewicz Dawid A, Masiukiewicz E, Rzeszotarska B, Dybała I, Kozioł A, Broda M. The synthesis, structure and properties of N-acetylated derivatives of ethyl 3-amino-1H-pyrazole-4-carboxylate. Chem Pharm Bull (Tokyo). 2007;55:747-52 pubmed
    ..The structural and spectroscopic characteristics of compounds 1-6 have been given and the methods for their preparation have been provided. ..
  3. Turner B, Sabo T, Wilding D, Maurer M. Mapping of factor XIII solvent accessibility as a function of activation state using chemical modification methods. Biochemistry. 2004;43:9755-65 pubmed
    ..Within the same domain, an acetylated Lys (677 or 678), which is observed in the zymogen, cannot be found in the activated enzyme. The results provide a more extensive view of FXIII activation than has been previously available. ..
  4. Frederiksen H, Frandsen H, Pfau W. Syntheses of DNA adducts of two heterocyclic amines, 2-amino-3-methyl-9H-pyrido[2,3-b]indole (MeAalphaC) and 2-amino-9H-pyrido[2,3-b]indole (AalphaC) and identification of DNA adducts in organs from rats dosed with MeAalphaC. Carcinogenesis. 2004;25:1525-33 pubmed
    ..Relative adduct level in DNA isolated from the liver of the rats was about 50.40 adducts/10(9) nt. The adduct levels were approximately 4-fold lower in the colon and the heart and approximately 12-fold lower in the kidney of the rats. ..
  5. Cao Y, Yamada H. Corrected order in the simultaneous debenzylation-acetolysis of methyl 2,3,4,6-tetra-O-benzyl-alpha-D-glucopyranoside. Carbohydr Res. 2006;341:909-11 pubmed
    ..The order is a correction of that previously reported. ..
  6. Wang W, Shen S, Zhang L, An H. [Determination of citric acid mono polyethyleneoxide nonyl phenyl ether amber diehylene glycoldinitrate diglycollic amide by IR]. Guang Pu Xue Yu Guang Pu Fen Xi. 2007;27:1121-3 pubmed
    ..So, the synthesis process conditions were right according to the IR data. ..
  7. Aoyagi A, Yano T, Kozuma S, Takatsu T. Pleofungins, novel inositol phosphorylceramide synthase inhibitors, from Phoma sp. SANK 13899. II. Structural elucidation. J Antibiot (Tokyo). 2007;60:143-52 pubmed
    ..Two alpha-hydroxy acid constituents, alpha-hydroxyisocaproic acid and alpha-hydroxyisovaleric acid, were isolated from the hydrolysate and their stereochemistries were determined by their specific rotations. ..
  8. Muljana H, Picchioni F, Knez Z, Heeres H, Janssen L. Insights in starch acetylation in sub- and supercritical CO2. Carbohydr Res. 2011;346:1224-31 pubmed publisher
    ..5-14.8MPa when going from 50 to 90°C (Ac(2)O mole fraction at the critical point in the range of 0.08-0.09). Acetylation experiments with a range of starch particles sizes showed a clear relation between the DS and the particle size...
  9. Cunningham J, Liu L, Callaghan R. Essential ("precursor") chemical control for heroin: impact of acetic anhydride regulation on US heroin availability. Drug Alcohol Depend. 2013;133:520-8 pubmed publisher
    ..This study lends support to the contention that essential ("precursor") chemical control can be used to help address heroin. ..

More Information

Publications105 found, 100 shown here

  1. Agnihotri G, Tiwari P, Misra A. One-pot synthesis of per-O-acetylated thioglycosides from unprotected reducing sugars. Carbohydr Res. 2005;340:1393-6 pubmed
    ..These reactions, which are catalyzed by BF3.OEt2, together constitute an efficient one-pot method for the synthesis of acetylated thioglycosides. ..
  2. Fan G, Wang M, Liao C, Fang T, Li J, Zhou R. Isolation of cellulose from rice straw and its conversion into cellulose acetate catalyzed by phosphotungstic acid. Carbohydr Polym. 2013;94:71-6 pubmed publisher
    ..2 can be obtained by changing the amount of phosphotungstic acid and the time of acetylation. Both the structure of cellulose separated from rice straw and cellulose acetate were confirmed by FTIR and XRD. ..
  3. Zanoni G, Valli M, Bendjeddou L, Porta A, Bruno P, Vidari G. Improved synthesis of (E)-12-nitrooctadec-12-enoic acid, a potent PPAR? activator. Development of a "buffer-free" enzymatic method for hydrolysis of methyl esters. J Org Chem. 2010;75:8311-4 pubmed publisher
    ..The latter method was then applied in the last step of the synthesis of a few labile natural products, such as prostaglandins, isoprostanes, and phytoprostanes. ..
  4. Andrews R, Paterson S. Production of identical retention times and mass spectra for {delta}9-tetrahydrocannabinol and cannabidiol following derivatization with trifluoracetic anhydride with 1,1,1,3,3,3-hexafluoroisopropanol*. J Anal Toxicol. 2012;36:61-5 pubmed publisher
    ..For the analysis of case samples, even if only THC is of interest, the presence of CBD cannot be excluded, and other derivatization techniques should be used. ..
  5. Gemperline P, Puxty G, Maeder M, Walker D, Tarczynski F, Bosserman M. Calibration-free estimates of batch process yields and detection of process upsets using in situ spectroscopic measurements and nonisothermal kinetic models: 4-(dimethylamino)pyridine- catalyzed esterification of butanol. Anal Chem. 2004;76:2575-82 pubmed
    ..One batch with added water to simulate a process upset was easily detected by the calibration free process model. ..
  6. Buvári Barcza A, Toth I, Barcza L. Anhydrous formic acid and acetic anhydride as solvent or additive in nonaqueous titrations. Pharmazie. 2005;60:650-5 pubmed
    ..In fact, some bases react with Ac2O forming an associate: the Ac+ group is bound to the delta- charged atom of the reactant while AcO- is associated with the delta+ group at appropriate distance. ..
  7. López Y, Rodríguez L, Del Río R, Farfán N, Morzycki J, Santillan R. Regioselective cleavage of 22-oxo-23-spiroketals. Novel cholestanic frameworks with pyranone and cyclopentenone E rings on the side chain. Steroids. 2012;77:534-41 pubmed publisher
    ..The X-ray analysis for compound 11b confirmed the 23R configuration for the new stereogenic center. ..
  8. Fujiwara M, Nishiyama M, Yamamura I, Ohtsuki S, Nomura R. A sol-gel method using acetic anhydride in the presence of cholesterol in organic solution media: preparation of silicas that recognize steroid hormones. Anal Chem. 2004;76:2374-81 pubmed
    ..This unique property of adsorption observed in silicas prepared using acetic anhydride in the presence of cholesterol is likely to be induced by the imprinting effect of the steroid skeleton part of cholesterol in silica matrix. ..
  9. Berendsen B, Mulder P, van Rhijn H. The derivatisation of avermectins and milbemycins in milk: new insights and improvement of the procedure. Anal Chim Acta. 2007;585:126-33 pubmed
    ..Using the optimised procedure a limit of detection (LoD) of 0.1 microg kg(-1) in milk was readily obtained. ..
  10. Tai C, Kulkarni S, Hung S. Facile Cu(OTf)2-catalyzed preparation of per-O-acetylated hexopyranoses with stoichiometric acetic anhydride and sequential one-pot anomeric substitution to thioglycosides under solvent-free conditions. J Org Chem. 2003;68:8719-22 pubmed
    ..Sequential anomeric substitution with p-thiocresol in the presence of BF3.etherate gave the thioglycosides, isolated exclusively or predominantly as one anomer in 66-75% yields. ..
  11. Le H, Ganem B. Trifluoroacetic anhydride-catalyzed oxidation of isonitriles by DMSO: a rapid, convenient synthesis of isocyanates. Org Lett. 2011;13:2584-5 pubmed publisher
    ..The newly formed isocyanates may be used directly or isolated in high purity by solvent evaporation. ..
  12. Mermerian A, Fu G. Catalytic enantioselective synthesis of quaternary stereocenters via intermolecular C-acylation of silyl ketene acetals: dual activation of the electrophile and the nucleophile. J Am Chem Soc. 2003;125:4050-1 pubmed
    ..Mechanistic studies support the hypothesis that the reaction involves activation both of the silyl ketene acetal (generation of an enolate) and of the anhydride (formation of an acylpyridinium ion). ..
  13. Tayyab S, Haq S, Sabeeha -, Aziz M, Khan M, Muzammil S. Effect of lysine modification on the conformation and indomethacin binding properties of human serum albumin. Int J Biol Macromol. 1999;26:173-80 pubmed
    ..A small decrease in the binding of drug to the guanidinated preparation also confirms the involvement of positive charge, probably contributed by lysine residue(s), in the binding of indomethacin to HSA...
  14. Kos N, Surmann J. [The determination of pyridoxine hydrochloride (vitamin B6) according to European Pharmacopoeia 4.0]. Pharmazie. 2006;61:414-6 pubmed
    ..In a mixture of formic acid/acetic anhydride the titration is made by perchloric acid. Because some critical points in this assay an alternative method is developed. This method is robust and should give results with high accuracy. ..
  15. Stratilova E, Dzúrovä M, Markovic O, Jornvall H. An essential tyrosine residue of Aspergillus polygalacturonase. FEBS Lett. 1996;382:164-6 pubmed
  16. Miyazaki K, Tsugita A. C-terminal sequencing method for proteins in polyacrylamide gel by the reaction of acetic anhydride. Proteomics. 2006;6:2026-33 pubmed
  17. Wagner M. Molecular depth profiling of multilayer polymer films using time-of-flight secondary ion mass spectrometry. Anal Chem. 2005;77:911-22 pubmed
    ..This study shows that polyatomic primary ions can be used for the molecular depth profiling of some multilayer polymer films and presents new opportunities for the analysis of thin organic films using TOF-SIMS. ..
  18. Argaman A, Shoshan Barmatz V. Dicyclohexylcarbodiimide interaction with sarcoplasmic reticulum. Inhibition of Ca2+ efflux. J Biol Chem. 1988;263:6315-21 pubmed
    ..The involvement of one or all of the DCCD-labeled proteins in Ca2+ release and ryanodine binding is discussed. ..
  19. Dharuman S, Gupta P, Kancharla P, Vankar Y. Synthesis of 2-nitroglycals from glycals using the tetrabutylammonium nitrate-trifluoroacetic anhydride-triethylamine reagent system and base-catalyzed Ferrier rearrangement of acetylated 2-nitroglycals. J Org Chem. 2013;78:8442-50 pubmed publisher
    ..Reactivity of these nitroacetates and associated selectivity has been examined, and some of the products have been converted into 2,3-diamino-2,3-dideoxyglycosides and methyl N-acetyl-D-lividosaminide. ..
  20. Lee H, Lysenko I, Cha J. Stereoselective synthesis of 2,4,6-trisubstituted tetrahydropyrans by the use of cyclopropanols as homoenols. Angew Chem Int Ed Engl. 2007;46:3326-8 pubmed
  21. Cai P, Konig R, Khan M, Qiu S, Kaphalia B, Ansari G. Autoimmune response in MRL+/+ mice following treatment with dichloroacetyl chloride or dichloroacetic anhydride. Toxicol Appl Pharmacol. 2006;216:248-55 pubmed
    ..Thickening was more pronounced in DCAC-treated mice. Our data suggest that DCAC and DCAA elicit autoimmune responses in MRL+/+ mice that might be reflective of their chloroacylation potential in vivo. ..
  22. Kawase -, Sunaga K, Tani S, Niwa M, Uematsu T. Trifluoromethyl ketone-based inhibitors of apoptosis in cerebellar granule neurons. Biol Pharm Bull. 2001;24:1335-7 pubmed
    ..Furthermore, these compounds effectively suppressed DNA fragmentation accompanied with apoptosis. The neuroprotection mode of 2 and 11 was not related to inhibition of caspase-3. ..
  23. Ferrahi M, Belbachir M. Preparation of poly(oxybutyleneoxymaleoyl) catalyzed by a proton exchanged montmorillonite clay. Molecules. 2004;9:968-77 pubmed
    ..The effects of the amounts of Mag-H and acetic anhydride were studied. The polymerization yield increased as the proportions of catalyst and acetic anhydride were increased. ..
  24. Stabeli R, Amui S, Sant Ana C, Pires M, Nomizo A, Monteiro M, et al. Bothrops moojeni myotoxin-II, a Lys49-phospholipase A2 homologue: an example of function versatility of snake venom proteins. Comp Biochem Physiol C Toxicol Pharmacol. 2006;142:371-81 pubmed
  25. Mathad V, Kumar S, Raj K. Oxidation studies on Andrographolide. Nat Prod Res. 2006;20:1053-8 pubmed
    ..Tritylation of andrographolide at C19-OH resulted to products 8 and diene 9, which can be converted to its acetate 10 and oxidation product 11. ..
  26. Hu C, Reddy N, Yan K, Yang Y. Acetylation of chicken feathers for thermoplastic applications. J Agric Food Chem. 2011;59:10517-23 pubmed publisher
    ..Acetylated feathers were thermoplastic and could be compression molded to form transparent films despite the relatively low percentage of acetyl content. ..
  27. Yang J, Gitlin I, Krishnamurthy V, Vazquez J, Costello C, Whitesides G. Synthesis of monodisperse polymers from proteins. J Am Chem Soc. 2003;125:12392-3 pubmed
    ..Modification of lysozyme on a gram scale demonstrated that the method can generate useful quantities of material. ..
  28. Martínez Uruñuela A, González Sáiz J, Pizarro C. Optimisation of the derivatisation reaction and subsequent headspace solid-phase microextraction method for the direct determination of chlorophenols in red wine. J Chromatogr A. 2004;1048:141-51 pubmed
    ..According to the validation of the method, we propose here, to our knowledge, the first application of solid-phase microextraction for the direct analysis of chlorophenols in red wine samples. ..
  29. Crotti S, Berti F, Pineschi M. Copper-catalyzed Perkin-acyl-Mannich reaction of acetic anhydride with pyridine: expeditious entry to unconventional piperidines. Org Lett. 2011;13:5152-5 pubmed publisher
    ..The N-acetyl-1,2-dihydropyridyl acetic acid methyl ester obtained is a valuable building block for the synthesis of new polyfunctionalized piperidine derivatives bearing unconventional substitution patterns. ..
  30. Yiu S, Lam W, Ho C, Lau T. Facile N...N coupling of manganese(V) imido species. J Am Chem Soc. 2007;129:803-9 pubmed
    ..The manganese(II) species is then rapidly oxidized by manganese(V) imide to give manganese(III) and CF3CONH2 (for TFAA) or NH3 (for TFA). ..
  31. Li Y, Liu W, Pang S. Synthesis and characterization of 5-nitro-2-nitratomethyl-1,2,3,4-tetrazole: a high nitrogen energetic compound with good oxygen balance. Molecules. 2012;17:5040-9 pubmed publisher
    ..07 kJ·mol?¹, the detonation pressure (P) values calculated for 4 was 37.92 GPa, the detonation velocity (D) can reach 9260 m·s?¹, and the oxygen balance was zero (Q), making 4 a competitive energetic compound. ..
  32. Stehmann A, Schröder H. Derivatisation of 4-nonylphenol and bisphenol A with halogenated anhydrides. Water Sci Technol. 2004;50:115-8 pubmed
    ..The NMR-spectra contained the predicted resonance signals...
  33. Welsch D, Nelsestuen G. Irreversible degradation of histidine-96 of prothrombin fragment 1 during protein acetylation: another unusually reactive site in the kringle. Biochemistry. 1988;27:7513-9 pubmed
    ..Deerfield, D.W., II, Olson, D.L., Koehler, K.A., Pedersen, L.G., & Hiskey, R.G. (1988) in Current Advances in Vitamin K Research (Suttie, J.W., Ed.) pp 325-334, Elsevier Science, New York]).(ABSTRACT TRUNCATED AT 250 WORDS) ..
  34. Yokoyama Y, Nakakoshi M, Okuno H, Sakamoto Y, Sakurai S. Mechanism for the direct synthesis of tryptophan from indole and serine: a useful NMR technique for the detection of a reactive intermediate in the reaction mixture. Magn Reson Chem. 2010;48:811-7 pubmed publisher
    ..The present results demonstrated that DOSY is a powerful tool for the detection of unstable intermediates. ..
  35. Tao Q. [Determination of fenfluramine hydrochloride in tablets by gas chromatography with derivatization]. Se Pu. 2001;19:270-2 pubmed
    ..The average recovery of the samples was (100.2 +/- 2.2)% (n = 6). The precision of the method is satisfactory(RSD = 1.4%). The method developed has been applied to the determination of fenfluramine hydrochloride in tablets...
  36. Zhang H, Gao F, Liu L, Li X, Zhou Z, Yang X, et al. Pullulan acetate nanoparticles prepared by solvent diffusion method for epirubicin chemotherapy. Colloids Surf B Biointerfaces. 2009;71:19-26 pubmed publisher
    ..Confocal laser scanning microscopy (CLSM) observations indicate that EPI-loaded nanoparticles were internalized and released in the cytoplasmic compartment...
  37. Belosludtsev Y, Iverson B, Lemeshko S, Eggers R, Wiese R, Lee S, et al. DNA microarrays based on noncovalent oligonucleotide attachment and hybridization in two dimensions. Anal Biochem. 2001;292:250-6 pubmed
    ..The data reveal that, subsequent to capping, the adsorptive association of oligonucleotide to the surface yields a probe layer which is capable of single nucleotide base mismatch discrimination and high apparent binding affinity...
  38. Il ina A, Varlamov V. [Effect of the degree of acetylation of chitosan on its enzymatic hydrolysis with the preparation Celloviridin G20x]. Prikl Biokhim Mikrobiol. 2003;39:273-7 pubmed
    ..1-2.0 mmol per 1 g chitosan). Hydrolysis by the enzymatic preparation Celloviridin G20x was performed at the enzyme to substrate ratio of 1:400 in sodium-acetate buffer, pH 5.2 (55 degrees C) for 1 h...
  39. Völgyi G, Beni S, Takács Novák K, Görög S. Theoretical problems associated with the use of acetic anhydride as a co-solvent for the non-aqueous titration of hydrohalides of organic bases and quaternary ammonium salts. J Pharm Biomed Anal. 2010;51:18-23 pubmed publisher
    ..Equations of the reactions involved in the titration process are shown in the paper...
  40. Li J, Wang G, Dong M, Zhang Q. The solvolysis of topotecan in alcohols and acetic anhydride. Bioorg Med Chem Lett. 2011;21:2324-6 pubmed publisher
    ..Bioactivity screening data showed all products could potentially inhibit the proliferation of several cancer cell lines in vitro and a bigger size group in 9-position would be favorable for the anti-tumor activities observably...
  41. Shan G, Yang X, Ma L, Rao Y. Pd-catalyzed C-H oxygenation with TFA/TFAA: expedient access to oxygen-containing heterocycles and late-stage drug modification. Angew Chem Int Ed Engl. 2012;51:13070-4 pubmed publisher
    ..A trifluoroacetic acid/trifluoroacetic acid anhydride solvent system serves as the oxygen source and is the critical factor for C-H activation...
  42. Horiyama S, Kunitomo M, Yoshikawa N, Nakamura K. Mass Spectrometric Approaches to the Identification of Potential Ingredients in Cigarette Smoke Causing Cytotoxicity. Biol Pharm Bull. 2016;39:903-8 pubmed publisher
    ..These ?,?-unsaturated carbonyl compounds may have a key role in CSE-induced cell death. ..
  43. Herz J, Swaminathan S, Pinkerton F, Wilson W, Schroepfer G. Inhibitors of sterol synthesis. A highly efficient and specific side-chain oxidation of 3 beta-acetoxy-5 alpha-cholest-8(14)-en-15-one for construction of metabolites and analogs of the 15-ketosterol. J Lipid Res. 1992;33:579-98 pubmed
    ..5 microM. In contrast, the corresponding 3,15-diketo acid XV had no detectable effect on reductase activity under the same conditions...
  44. Horiguchi Y, Sonobe A, Saitoh T, Toda J, Sano T. Intramolecular capture of pummerer reaction intermediates by an aromatic nucleophile: selective construction of 1,4-benzothiazine and indole ring systems. Chem Pharm Bull (Tokyo). 2001;49:1132-7 pubmed
    ..These results demonstrate that the construction of 1,4-benzothiazine and indole ring systems can be achieved in a selective manner by proper choice of the sulfoxide side chain...
  45. Di Gioia M, Leggio A, Le Pera A, Liguori A, Napoli A, Perri F, et al. Determination by gas chromatography/mass spectrometry of p-phenylenediamine in hair dyes after conversion to an imine derivative. J Chromatogr A. 2005;1066:143-8 pubmed
    ..The regression calibration curves for PPDA in hair dyes are linear within 0.1 +/- 25 mg/ml with 0.99 as a typical correlation coefficient...
  46. Tompkins E, Farmer P, Lamb J, Jukes R, Dingley K, Ubick E, et al. A novel 14C-postlabeling assay using accelerator mass spectrometry for the detection of O6-methyldeoxy-guanosine adducts. Rapid Commun Mass Spectrom. 2006;20:883-91 pubmed
    ..Although the assay has so far only been carried out with labeled standards, the degree of sensitivity obtained illustrates the potential of this assay for measuring O6-MedG levels in humans...
  47. George M, Hall M, Jina O, Portius P, Sun X, Towrie M, et al. Understanding the factors affecting the activation of alkane by Cp'Rh(CO)2 (Cp' = Cp or Cp*). Proc Natl Acad Sci U S A. 2010;107:20178-83 pubmed publisher
    ..This interplay results in the activation being controlled by the percentage of alkane conformers...
  48. Higuchi K, Tayu M, Kawasaki T. Active thionium species mediated functionalization at the 2?-position of indole derivatives. Chem Commun (Camb). 2011;47:6728-30 pubmed publisher
    ..Carbon and heteroatom nucleophiles were directly introduced via a one-pot procedure in excellent yields...
  49. Murase S, Yumoto N. Characterization of three types of aspartase activated by site-directed mutagenesis, limited proteolysis, and acetylation. J Biochem. 1993;114:735-9 pubmed
  50. Han E, Yang W, Lee J, Park Y, Kim E, Lim M, et al. Correlation of methamphetamine results and concentrations between head, axillary, and pubic hair. Forensic Sci Int. 2005;147:21-4 pubmed
    ..Namely, the concentrations of MA and AP were higher in axillary and pubic hair than in head hair...
  51. Guo G, Whitesell J, Fox M. Synthesis of TiO2 photocatalysts in supercritical CO2 via a non-hydrolytic route. J Phys Chem B. 2005;109:18781-5 pubmed
    ..Calcined TiO2 prepared from titanium(IV) isopropoxide and trifluoroacetic anhydride was effectively dispersed in aerated supercritical carbon dioxide under stirring and exhibited high photocatalytic oxidation activity...
  52. Tran K, Bickar D. Dakin-West synthesis of beta-aryl ketones. J Org Chem. 2006;71:6640-3 pubmed
    ..Hydrocinnamic acid, a compound previously reported to be unreactive under Dakin-West conditions, forms 4-phenyl-2-butanone when the reaction is catalyzed by 1-methylimidazole...
  53. Nagaraj R, Nahomi R, Shanthakumar S, Linetsky M, Padmanabha S, Pasupuleti N, et al. Acetylation of ?A-crystallin in the human lens: effects on structure and chaperone function. Biochim Biophys Acta. 2012;1822:120-9 pubmed publisher
    ..Together, our data suggest that acetylation of ?A-crystallin occurs in the human lens and that it affects the chaperone function of the protein...
  54. Li K, Liu S, Tan Y, Chao N, Tian X, Qi L, et al. Optimized GC-MS method to simultaneously quantify acetylated aldose, ketose, and alditol for plant tissues based on derivatization in a methyl sulfoxide/1-methylimidazole system. J Agric Food Chem. 2013;61:4011-8 pubmed publisher
    ..The results demonstrate that acetylated derivatives of 23 saccharides had unique peaks, which indicates aldose, ketose, and alditol can be determined simultaneously by GC-MS. ..
  55. Taneja K, Gupta S, Kuhad R. Properties and application of a partially purified alkaline xylanase from an alkalophilic fungus Aspergillus nidulans KK-99. Bioresour Technol. 2002;85:39-42 pubmed
    ..The xylanase dose of 1.0 IU/g dry weight pulp gave optimum bleach boosting of Kraft pulp at pH 8.0 and temperature 55 degrees C for 3 h reaction time...
  56. Bartók M, Kele Z, Kortvelyesi T, Bartók T, Felföldi K. Investigations in chiral reactions: identification of new adducts in the reactions of ethyl pyruvate with acetic anhydride and pyridine. Rapid Commun Mass Spectrom. 2003;17:2849-52 pubmed
  57. Zwickenpflug W, Tyroller S. Reaction of the tobacco alkaloid myosmine with hydrogen peroxide. Chem Res Toxicol. 2006;19:150-5 pubmed
    ..In addition, because of acetylating conditions using acetic acid anhydride, N-(4-oxo-4-pyridin-3-yl-butyl)acetamide was rapidly formed during the first 30 min of the reaction...
  58. Nam H, Lee G, Kim Y. Mass spectrometric identification of K210 essential for rat malonyl-CoA decarboxylase catalysis. J Proteome Res. 2006;5:1398-406 pubmed
    ..Therapeutic inhibition of MCD may be a viable approach to treating various clinical pathologies associated with defective fatty acid metabolism...
  59. Viñas Bravo O, Martínez Pascual R, Vega Baez J, Gómez Calvario V, Sandoval Ramírez J, Montiel Smith S, et al. Rapid conversion of spirostans into furostan skeletons at room temperature. Steroids. 2012;77:59-66 pubmed publisher
    ..In the case of 22-hydroxyfurostans, they can be transformed to pseudosapogenins by treatment with p-toluensulfonic acid...
  60. Angelis Y, Kioussi M, Kiousi P, Brenna J, Georgakopoulos C. Examination of the kinetic isotopic effect to the acetylation derivatization for the gas chromatographic-combustion-isotope ratio mass spectrometric doping control analysis of endogenous steroids. Drug Test Anal. 2012;4:923-7 pubmed publisher
    ..Regression analysis of the ??(13)C of enriched acetic anhydrides versus ??(13)C of derivatized steroids shows that KIE are similar in all cases...
  61. Cunha A, Freire C, Silvestre A, Neto C, Gandini A. Reversible hydrophobization and lipophobization of cellulose fibers via trifluoroacetylation. J Colloid Interface Sci. 2006;301:333-6 pubmed
    ..However, the original cellulose hydrophilicity could be readily restored through hydrolysis, by treating the modified fibers with neutral water...
  62. Romero M, Calvo L, Alba C, Daneshfar A. A kinetic study of isoamyl acetate synthesis by immobilized lipase-catalyzed acetylation in n-hexane. J Biotechnol. 2007;127:269-77 pubmed
    ..Equation predictions and experimental reaction rate values matched very well at conditions where acetic acid concentration in the medium was low...
  63. Ong W, Beeler A, Kesavan S, Panek J, Porco J. Nucleophilic addition to N-phosphinylimines by rare-earth-metal triflate/trifluoroacetic anhydride activation. Angew Chem Int Ed Engl. 2007;46:7470-2 pubmed
  64. Giannetti L, Giorgi A, Necci F, Ferretti G, Buiarelli F, Neri B. Validation study on avermectine residues in foodstuffs. Anal Chim Acta. 2011;700:11-5 pubmed publisher
    ..0 to 200.0 ?g kg(-1). The main advantages of the presented method are its rapidity, the specificity, the good precision and recovery that make it very suitable to the detection and determination of avermectines...
  65. Tindall G, Perry R, Spaugh A. Determination of aliphatic anhydrides and acids by reversed-phase liquid chromatography. J Chromatogr A. 2000;868:41-50 pubmed
    ..The corresponding acids can be determined at the same time. The effect of the stationary phase on anhydride hydrolysis rates may prove to be a sensitive means of probing stationary phase chemistry...
  66. Goldman R, Day B, Carver T, Mauthe R, Turteltaub K, Shields P. Quantitation of benzo[a]pyrene-DNA adducts by postlabeling with 14C-acetic anhydride and accelerator mass spectrometry. Chem Biol Interact. 2000;126:171-83 pubmed
    ..Quantitation of the 14C-postlabeled adduct by AMS promises to allow detection of attomolar amounts of adducts. The method is now being optimized and validated for use in human samples...
  67. Cao Y, Okada Y, Yamada H. Facile and regioselective preparation of partly O-benzylated D-glucopyranose acetates via acid-mediated simultaneous debenzylation-acetolysis. Carbohydr Res. 2006;341:2219-23 pubmed
    ..The key points of the preparative reactions were the control of the acid strength and choice of suitable substrates...
  68. Forsman J, Wärnå J, Murzin D, Leino R. Reaction kinetics and mechanism of acid-catalyzed anomerization of 1-O-acetyl-2,3,5-tri-O-benzoyl-L-ribofuranose. Carbohydr Res. 2009;344:1102-9 pubmed publisher
    ..The role of the acetyl cation as the catalytically active species was further verified...
  69. Liu K, Huang Y. Lipase-catalyzed production of a bioactive terpene ester in supercritical carbon dioxide. J Biotechnol. 2010;146:215-20 pubmed publisher
    ..The kinetic constants were obtained by multiple regression analysis of experimental findings. The reaction went smoothly without the use of hazardous reactants, and the developed method is useful for industrial application...
  70. Shah A, Aatif M, Priyadarshini M, Khan M, Amin F, Bano B. Studies on the chemical modification of goat liver cystatin and the effect on its anti-papain inhibitory activity. J Fluoresc. 2012;22:1627-32 pubmed publisher
    ..The acetylated cystatin showed a decrease in fluorescence intensity at 335 nm which could be attributed to the modification of tyrosine residue due to side reaction...
  71. Weber M, Peters R. Pd(II)-catalyzed regio-, enantio-, and diastereoselective 1,4-addition of azlactones formed in situ from racemic unprotected amino acids and acetic anhydride. J Org Chem. 2012;77:10846-55 pubmed publisher
    ..Key for the high regioselectivity is a pentaphenylferrocene monopalladacycle catalyst...
  72. Gazy A, Mahgoub H, El Yazbi F, el Sayed M, Youssef R. Determination of some histamine H1-receptor antagonists in dosage forms. J Pharm Biomed Anal. 2002;30:859-67 pubmed
    ..The product of condensation is measured spectrophotometrically. All the reaction conditions for the proposed methods have been studied...
  73. Waidyanatha S, Rappaport S. Investigation of cysteinyl protein adducts of benzene diolepoxide. Chem Biol Interact. 2005;153-154:261-6 pubmed
    ..Reaction products between these and L-cysteine, and GSH were identified and characterized by mass spectrometry in an attempt to develop an assay to quantify these adducts in serum albumin...
  74. Jackson S, Siervo M, Persson E, McKenna L, Bluck L. A novel derivative for the assessment of urinary and salivary nitrate using gas chromatography/mass spectrometry. Rapid Commun Mass Spectrom. 2008;22:4158-64 pubmed publisher
  75. Yin S, Tang C, Wen Q, Yang X. Effects of acylation on the functional properties and in vitro trypsin digestibility of red kidney bean (Phaseolus vulgaris L.) protein isolate. J Food Sci. 2009;74:E488-94 pubmed publisher
    ..The results suggest that the functional properties of KPI could be modulated by the chemical acylation treatment, using succinic or acetic anhydride at appropriate anhydride-to-protein ratios...
  76. Wong C, Ho E, Kwok W, Leung D, Leung G, Tang F, et al. Interconversion of ephedrine and pseudoephedrine during chemical derivatization. Drug Test Anal. 2012;4:1028-33 pubmed publisher
    ..A mechanism for the interconversion was proposed. These findings indicated that fluorinated acylating agents should not be used for the unequivocal identification or quantification of EP and PE as the results obtained can be erroneous...
  77. Chiaradia V, Paroul N, Cansian R, Júnior C, Detofol M, Lerin L, et al. Synthesis of eugenol esters by lipase-catalyzed reaction in solvent-free system. Appl Biochem Biotechnol. 2012;168:742-51 pubmed publisher
  78. Wang X, Zhang L, Wu J, Xu W, Wang X, Lu X. Improvement of simultaneous determination of neutral monosaccharides and uronic acids by gas chromatography. Food Chem. 2017;220:198-207 pubmed publisher
    ..The linearity, sensitivity, precision, reproducibility and recovery rate of the improved method were evaluated. Thereafter, five polysaccharide samples from different sources were analyzed to validate the improved method. ..
  79. Pfäffli P, Hämeilä M, Keskinen H, Wirmoila R. Exposure to cyclic anhydrides in welding: a new allergen-chlorendic anhydride. Appl Occup Environ Hyg. 2002;17:765-7 pubmed
    ..HCl exposure was the highest (<0.5-20 ppm) during welding. It is recommended that dry paint coating be removed from an area around the seam with an abrasive wheel, not by burning, before welding...
  80. Silverio C, Azad M, Gomez F. On-column derivatization of the antibiotics teicoplanin and ristocetin coupled to affinity capillary electrophoresis. Electrophoresis. 2003;24:808-15 pubmed
    ..The techniques described here can be used to assess how the derivatization of drugs alters their affinities for target molecules...
  81. Buvári Barcza A, Barcza L. Problems in the interpretation of nonaqueous titrations. Pharmazie. 2005;60:243-6 pubmed
  82. Stefke B, Windeisen E, Schwanninger M, Hinterstoisser B. Determination of the weight percentage gain and of the acetyl group content of acetylated wood by means of different infrared spectroscopic methods. Anal Chem. 2008;80:1272-9 pubmed publisher
    ..By reason of its additional potential for on-line process control, the NIR method may even outperform the FTIR method...
  83. Chung W, Evans S, Freed A, Keba J, Baer Z, Rege K, et al. Utilization of lysozyme charge ladders to examine the effects of protein surface charge distribution on binding affinity in ion exchange systems. Langmuir. 2010;26:759-68 pubmed publisher
    ..Electrostatic potential maps of these variants were then generated to provide further insight into the elution order of the variants...
  84. Li J, Zhang L, Peng F, Bian J, Yuan T, Xu F, et al. Microwave-assisted solvent-free acetylation of cellulose with acetic anhydride in the presence of iodine as a catalyst. Molecules. 2009;14:3551-66 pubmed publisher
    ..The optimal reaction time and temperature found in this work were 30 min and 130 degrees C...
  85. Alam M, Liu L, Lee D. Cytotoxicity of new 5-phenyl-4,5-dihydro-1,3,4-thiadiazole analogues. Chem Pharm Bull (Tokyo). 2011;59:1413-6 pubmed
    ..by condensation of thiosemicarbazide with substituted benzaldehydes, followed by cyclization with acetic anhydrides in good yields...
  86. Cressman E, Jahangir D. Dual mode single agent thermochemical ablation by simultaneous release of heat energy and acid: hydrolysis of electrophiles. Int J Hyperthermia. 2013;29:71-8 pubmed publisher
    ..This study aimed to investigate two readily available electrophilic reagents, acetyl chloride (AcCl), and acetic anhydride (Ac(2)O), for their potential in tissue ablation...
  87. Anderson M, Robertson A, Macher I, Raetz C. Biosynthesis of lipid A in Escherichia coli: identification of UDP-3-O-[(R)-3-hydroxymyristoyl]-alpha-D-glucosamine as a precursor of UDP-N2,O3-bis[(R)-3-hydroxymyristoyl]-alpha-D-glucosamine. Biochemistry. 1988;27:1908-17 pubmed
    ..Our observations provide strong evidence that UDP-3-O-[(R)-3-hydroxymyristoyl]glucosamine is a true intermediate in the biosynthesis of UDP-2,3-diacyl-GlcN and lipid A...
  88. Shenoy N, Shively J, Bailey J. Studies in C-terminal sequencing: new reagents for the synthesis of peptidylthiohydantoins. J Protein Chem. 1993;12:195-205 pubmed
    ..These include: milder reaction conditions, faster reaction times, and the ability to sequence through C-terminal aspartic acid. The TBSn-ITC reagent was found to be comparable to TMS-ITC for formation of peptidylthiohydantoins...
  89. Koroskenyi B, McCarthy S. Synthesis of acetylated konjac glucomannan and effect of degree of acetylation on water absorbency. Biomacromolecules. 2001;2:824-6 pubmed
    ..0 g/g water absorbency vs the 105.4 g/g absorbency of native konjac. Because of the exponential decrease of water absorbency with increasing DS, a relatively small DS is sufficient to significantly suppress the absorption of water...
  90. Nimesh S, Aggarwal A, Kumar P, Singh Y, Gupta K, Chandra R. Influence of acyl chain length on transfection mediated by acylated PEI nanoparticles. Int J Pharm. 2007;337:265-74 pubmed
    ..Of all the systems prepared, nanoparticles with 30% acylation using propionic anhydride were found to be the most efficient in in vitro transfection...
  91. Savarin C, Grisé C, Murry J, Reamer R, Hughes D. Novel intramolecular reactivity of oximes: synthesis of cyclic and spiro-fused imines. Org Lett. 2007;9:981-3 pubmed
    ..An initial mechanistic investigation suggests the reaction occurs via a nitrenium or vinyl nitrene intermediate. [reaction: see text]..
  92. Konig R, Cai P, Guo X, Ansari G. Transcriptomic analysis reveals early signs of liver toxicity in female MRL +/+ mice exposed to the acylating chemicals dichloroacetyl chloride and dichloroacetic anhydride. Chem Res Toxicol. 2008;21:572-82 pubmed publisher
    ..The data also demonstrate the power of microarray analysis in detecting early changes in liver function following exposure to environmental toxicants...