Ion Ghiviriga

Summary

Affiliation: University of Florida
Country: USA

Publications

  1. doi request reprint 19F chemical shifts, coupling constants and conformational preferences in monosubstituted perfluoroparacyclophanes
    Ion Ghiviriga
    Chemistry Department, University of Florida, Gainesville, 32611 7200, USA
    Magn Reson Chem 49:93-105. 2011
  2. ncbi request reprint Selective Excitation 1D-NMR Experiments for the Assignment of the Absolute Configuration of Secondary Alcohols
    Ion Ghiviriga
    Chemistry Department, University of Florida, Gainesville, Florida 32611 7200, United States
    J Org Chem 77:3978-85. 2012
  3. doi request reprint Tautomerism of guanidines studied by (15)N NMR: 2-hydrazono-3-phenylquinazolin-4(3H)-ones and related compounds
    Ion Ghiviriga
    Chemistry Department, University of Florida, Gainesville, FL 32611 7200, USA
    Org Biomol Chem 7:4110-9. 2009
  4. doi request reprint Mono- and difluorinated 1,1,2,2,9,9,10,10-octafluoro[2.2]paracyclophanes (AF4s)-A (1)H and (19)F NMR study
    Ion Ghiviriga
    University of Florida, Chemistry Department, Gainesville, FL 32611 7200, USA
    Magn Reson Chem 47:313-21. 2009
  5. ncbi request reprint An unexpected reaction of trimethylsilyl fluorosulfonyldifluoroacetate (TFDA) with imidazoles. Formation of N-difluoromethylthioureas
    Wei Xu
    Department of Chemistry, University of Florida, Gainesville, Florida 32611 7200, USA
    Org Lett 8:5549-51. 2006
  6. doi request reprint Unusually stable tungstenacyclobutadienes featuring an ONO trianionic pincer-type ligand
    Matthew E O'Reilly
    University of Florida, Department of Chemistry, Center for Catalysis, P O Box 117200, Gainesville, Florida 32611, USA
    Dalton Trans 42:3326-36. 2013
  7. ncbi request reprint Synthesis of novel pentafluorosulfanylfurans. Two retro-Diels-Alder approaches
    William R Dolbier
    Department of Chemistry, University of Florida, Gainesville, Florida 32611 7200, USA
    Org Lett 8:5573-5. 2006
  8. ncbi request reprint Atropisomerism of a monosubstituted perfluoro[2.2]paracyclophane. A combined synthetic, kinetic, spectroscopic and computational study
    Ion Ghiviriga
    Department of Chemistry, University of Florida, Gainesville, FL 32611 7200, USA
    Org Biomol Chem 10:882-9. 2012
  9. doi request reprint Inorganic click (iClick) synthesis of heterotrinuclear Pt(II)/Au(I)2 complexes
    Andrew R Powers
    University of Florida, Center for Catalysis, Department of Chemistry, P O Box 117200, Gainesville, Florida 32611, USA
    Dalton Trans 42:14963-6. 2013
  10. doi request reprint Human cancerous and healthy cell cytotoxicity studies of a chiral μ-dicarbene-digold(I) metallamacrocycle
    Amrita B Mullick
    University of Florida, Department of Chemistry, Center for Catalysis, P O Box 117200, Gainesville, Florida 32611, USA
    Dalton Trans 42:7440-6. 2013

Collaborators

  • William R Dolbier
  • Wei Xu
  • Alan Roy Katritzky
  • Peter J Steel
  • Tomas Hudlicky
  • Claudio F Tormena
  • S F Wnuk
  • Khalil A Abboud
  • Adam S Veige
  • Matthew E O'Reilly
  • Andrew R Powers
  • Amrita B Mullick
  • Soumya Sarkar
  • David R Snead
  • Lianhao Zhang
  • Kai K Li
  • Iwona A Kaluzna
  • Bernhard J Paul
  • Yun Min Chang
  • Weihong Tan
  • Trevor J Del Castillo
  • Xi Yang
  • Subramaniam Kuppuswamy
  • Kevin P McGowan
  • Katsu Ogawa
  • Sukwon Hong
  • William T Beeson
  • Nigel G J Richards
  • Weerawut Wittayanan
  • Jon D Stewart
  • Brent D Feske
  • Theodore A Martinot
  • Jerremey Willis

Detail Information

Publications18

  1. doi request reprint 19F chemical shifts, coupling constants and conformational preferences in monosubstituted perfluoroparacyclophanes
    Ion Ghiviriga
    Chemistry Department, University of Florida, Gainesville, 32611 7200, USA
    Magn Reson Chem 49:93-105. 2011
    ..Understanding the conformational preferences of PFPCs and how they are reflected by the coupling constants facilitates the assignment of (19)F chemical shifts in monosubstituted PFPCs and the identification of the disubstituted products...
  2. ncbi request reprint Selective Excitation 1D-NMR Experiments for the Assignment of the Absolute Configuration of Secondary Alcohols
    Ion Ghiviriga
    Chemistry Department, University of Florida, Gainesville, Florida 32611 7200, United States
    J Org Chem 77:3978-85. 2012
    ..Typically, the analysis takes less than 30 min. A longer mixing time, selective excitation of other signals, or NOESY1D experiments can be used for measuring ΔδRS of other protons...
  3. doi request reprint Tautomerism of guanidines studied by (15)N NMR: 2-hydrazono-3-phenylquinazolin-4(3H)-ones and related compounds
    Ion Ghiviriga
    Chemistry Department, University of Florida, Gainesville, FL 32611 7200, USA
    Org Biomol Chem 7:4110-9. 2009
    ..2-Hydrazino-benzimidazole derivative 12 and 2-hydrazino-4,6-dimethylpyrimidine derivative 13 were found to exist predominantly as the amino tautomers...
  4. doi request reprint Mono- and difluorinated 1,1,2,2,9,9,10,10-octafluoro[2.2]paracyclophanes (AF4s)-A (1)H and (19)F NMR study
    Ion Ghiviriga
    University of Florida, Chemistry Department, Gainesville, FL 32611 7200, USA
    Magn Reson Chem 47:313-21. 2009
    ..These features have been used to assign the regiochemistry of the pseudo-ortho, pseudo-meta and pseudo-para-difluoro AF4s 2-4. It has also been demonstrated that SCS for the bridge fluorines can be used as well for this assignment...
  5. ncbi request reprint An unexpected reaction of trimethylsilyl fluorosulfonyldifluoroacetate (TFDA) with imidazoles. Formation of N-difluoromethylthioureas
    Wei Xu
    Department of Chemistry, University of Florida, Gainesville, Florida 32611 7200, USA
    Org Lett 8:5549-51. 2006
    ..reaction: see text]...
  6. doi request reprint Unusually stable tungstenacyclobutadienes featuring an ONO trianionic pincer-type ligand
    Matthew E O'Reilly
    University of Florida, Department of Chemistry, Center for Catalysis, P O Box 117200, Gainesville, Florida 32611, USA
    Dalton Trans 42:3326-36. 2013
    ..Single crystal X-ray analysis of 5, 6, 7, and 8 provides insight into possible steric inadequacies within the CF(3)-ONO(3-) ligand to promote catalytic metathesis...
  7. ncbi request reprint Synthesis of novel pentafluorosulfanylfurans. Two retro-Diels-Alder approaches
    William R Dolbier
    Department of Chemistry, University of Florida, Gainesville, Florida 32611 7200, USA
    Org Lett 8:5573-5. 2006
    ..Also, a tandem cycloaddition/retrocycloaddition reaction between 4-phenyloxazole and 1-pentafluorosulfanylhex-1-yne was used to prepare 3-pentafluorosulfanyl-4-butylfuran. [reaction: see text]...
  8. ncbi request reprint Atropisomerism of a monosubstituted perfluoro[2.2]paracyclophane. A combined synthetic, kinetic, spectroscopic and computational study
    Ion Ghiviriga
    Department of Chemistry, University of Florida, Gainesville, FL 32611 7200, USA
    Org Biomol Chem 10:882-9. 2012
    ..Enol product 5 was cyclized, under basic conditions, to form a benzofuran product 6. Its structure was confirmed by NMR, with further structural and mechanistic insights being provided by calculations...
  9. doi request reprint Inorganic click (iClick) synthesis of heterotrinuclear Pt(II)/Au(I)2 complexes
    Andrew R Powers
    University of Florida, Center for Catalysis, Department of Chemistry, P O Box 117200, Gainesville, Florida 32611, USA
    Dalton Trans 42:14963-6. 2013
    ..In addition, a discussion regarding the connection between traditional azide-alkyne cycloaddition reactions and iClick is presented focusing on applications towards linking multiple metal ions...
  10. doi request reprint Human cancerous and healthy cell cytotoxicity studies of a chiral μ-dicarbene-digold(I) metallamacrocycle
    Amrita B Mullick
    University of Florida, Department of Chemistry, Center for Catalysis, P O Box 117200, Gainesville, Florida 32611, USA
    Dalton Trans 42:7440-6. 2013
    ..The complex 8-(+/-) is characterized by a combination of NMR techniques (gDQCOSY, gHSQC, gHMBC and ROESY), single crystal X-ray diffraction, and combustion analysis...
  11. ncbi request reprint A New ONO(3-) Trianionic Pincer-Type Ligand for Generating Highly Nucleophilic Metal-Carbon Multiple Bonds
    Matthew E O'Reilly
    Department of Chemistry, Center for Catalysis, University of Florida, P O Box 117200, Gainesville, Florida 32611, United States
    J Am Chem Soc 134:11185-95. 2012
    ..For complex 2, the Lewis acids MeOTf, Me(3)SiOTf, and B(C(6)F(5))(3) catalyze isobutylene expulsion to yield the tungsten-oxo complex [CF(3)-ONO]W(O)((n)Pr) (6)...
  12. ncbi request reprint Reactions of nucleophiles with perfluoro[2.2]paracyclophane
    Lianhao Zhang
    Department of Chemistry, P O Box 117200, University of Florida, Gainesville, Florida 32611 7200, USA
    J Org Chem 74:6831-6. 2009
    ..All reactions appear to proceed via S(N)Ar mechanisms; reactivity issues are discussed including the effect of substituents on reactivity and regiochemistry of substitution...
  13. doi request reprint A new route to acyclic diaminocarbenes via lithium-halogen exchange
    David R Snead
    Department of Chemistry, University of Florida, P O Box 117200, Gainesville, Florida 32611 7200, USA
    Org Lett 11:3274-7. 2009
    ..Rh-ADC complex 4 is an effective catalyst for the 1,2-addition of aryl boronic acids to aryl aldehydes...
  14. ncbi request reprint Expedient synthesis of N-Z-pyroglutamyl-amino acid derivatives
    Alan R Katritzky
    Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL 32611 7200, USA
    Bioorg Med Chem Lett 17:6000-2. 2007
    ..Structures are supported by 2D NMR studies and by comparison with the same products prepared by direct coupling of the C-terminus activated N-pGlu 1b and free amino acids 2a-c...
  15. ncbi request reprint An OCO(3-) Trianionic Pincer Tungsten(VI) Alkylidyne: Rational Design of a Highly Active Alkyne Polymerization Catalyst
    Soumya Sarkar
    Center for Catalysis, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
    J Am Chem Soc 134:4509-12. 2012
    ..05 × 10(6) g(PPA) mol(cat)(-1) h(-1)),and yield (87%) for the polymerization of 1-ethynyl-4-fluorobenzene...
  16. ncbi request reprint A convenient gHMQC-based NMR assay for investigating ammonia channeling in glutamine-dependent amidotransferases: studies of Escherichia coli asparagine synthetase B
    Kai K Li
    Department of Chemistry, University of Florida, Gainesville, Florida 32611 7200, USA
    Biochemistry 46:4840-9. 2007
    ....
  17. ncbi request reprint Stereoselective, biocatalytic reductions of alpha-chloro-beta-keto esters
    Iwona A Kaluzna
    Department of Chemistry, University of Florida, Gainesville, Florida 32611, USA
    J Org Chem 70:342-5. 2005
    ....
  18. ncbi request reprint Synthesis, structure, and biological evaluation of novel N- and O-linked diinositols
    Bernhard J Paul
    University of Florida, Department of Chemistry, PO Box 117200, Gainesville, Florida 32611, USA
    J Am Chem Soc 124:10416-26. 2002
    ..One of the attendant benefits of the preparation of these compounds has been expressed in the design and synthesis of new salen catalysts whose effectiveness has been compared with Jacobsen's catalyst in the epoxidation of styrene...