Ajai K Singh
Affiliation: Indian Institute of Technology
Singh M, Saleem F, Rao G, Kumar S, Joshi H, Singh A. Palladacycles of unsymmetrical (N,Câ»,E) (E = S/Se) pincers based on indole: their synthesis, structure and application in the catalysis of Heck coupling and allylation of aldehydes. Dalton Trans. 2016;45:6718-25 pubmed publisher
..The catalytic activities of complexes and were investigated for Heck coupling and allylation of aldehydes. The two reactions require 0.1-0.3 and 1 mol% loading of complexes as catalysts, respectively. ..
Sharma A, Joshi H, Bhaskar R, Kumar S, Singh A. Palladacycles of sulfated and selenated Schiff bases of ferrocene-carboxaldehyde as catalysts for O-arylation and Suzuki-Miyaura coupling. Dalton Trans. 2017;46:2485-2496 pubmed publisher
..The catalytic process is somewhat more efficient with 2 (Pd bonded with a selenoether group), than 3, followed by 1. ..
Sharma A, Joshi H, Bhaskar R, Singh A. Complexes of (Î·5-Cp*)Ir(iii) with 1-benzyl-3-phenylthio/selenomethyl-1,3-dihydrobenzoimidazole-2-thione/selenone: catalyst for oxidation and 1,2-substituted benzimidazole synthesis. Dalton Trans. 2017;46:2228-2237 pubmed publisher
..Each catalytic process is marginally more efficient with 1 than its counterparts. ..
Singh V, Singh A. Tetragonal Cu2Se nanoflakes: synthesis using selenated propylamine as Se source and activation of Suzuki and Sonogashira cross coupling reactions. Dalton Trans. 2015;44:725-32 pubmed publisher
..In comparison to many other copper based nano-crystals, the present nanoflakes are a better activator. ..
Prakash O, Joshi H, Kumar U, Sharma A, Singh A. Acridine based (S,N,S) pincer ligand: designing silver(I) complexes for the efficient activation of AÂ³ (aldehyde, alkyne and amine) coupling. Dalton Trans. 2015;44:1962-8 pubmed publisher
..0 mol% loading of 1 and 0.5 mol% of 2 for good conversion. Complex 2 is a rare example of a catalyst that can efficiently activate A(3) coupling at a 0.5 mol% loading of Ag. ..
Kumar Rao G, Kumar A, Saleem F, Singh M, Kumar S, Kumar B, et al
. Palladium(II)-1-phenylthio-2-arylchalcogenoethane complexes: palladium phosphide nano-peanut and ribbon formation controlled by chalcogen and Suzuki coupling activation. Dalton Trans. 2015;44:6600-12 pubmed publisher
..This palladium may also be released from in situ generated NPs. In the case of , negligible reactivity may be due to non-release of Pd. ..
Dubey P, Gupta S, Singh A. Base free N-alkylation of anilines with ArCH2OH and transfer hydrogenation of aldehydes/ketones catalyzed by the complexes of Î·5-Cp*Ir(iii) with chalcogenated Schiff bases of anthracene-9-carbaldehyde. Dalton Trans. 2018;47:3764-3774 pubmed publisher
..The real catalytic species proposed in the case of iridacycles results due to the loss of the Cp* ring. ..
Saleem F, Rao G, Kumar S, Singh M, Singh A. Complexes of (Î·(6)-benzene)ruthenium(II) with 1,4-bis(phenylthio/seleno-methyl)-1,2,3-triazoles: synthesis, structure and applications in catalytic activation of oxidation and transfer hydrogenation. Dalton Trans. 2015;44:19141-52 pubmed publisher
..DFT calculations are consistent with somewhat low reactivity of 1 in comparison to those of 2-4. ..
Kumar S, Saleem F, Singh A. 'Click' generated 1,2,3-triazole based organosulfur/selenium ligands and their Pd(ii) and Ru(ii) complexes: their synthesis, structure and catalytic applications. Dalton Trans. 2016;45:11445-58 pubmed publisher
..1, with a sulfur ligand, is more efficient than 2 (Se analog) for both SMC and the Sonogashira coupling. The activities of 3 and 4 for TH are in the order Se > S. ..