Ajai K Singh
Affiliation: Indian Institute of Technology
- 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. ..
- Singh P, Singh A. Palladium(ii) complexes of N,N-diphenylacetamide based thio/selenoethers and flower shaped Pd16S7 and prismatic Pd17Se15 nano-particles tailored as catalysts for C-C and C-O coupling. Dalton Trans. 2017;46:10037-10049 pubmed publisher..0001-0.01 and 0.1 mol% of Pd, respectively, for the two reactions. The reuse of the complexes or NPs as a catalyst is demonstrated. ..
- Dubey P, Gupta S, Singh A. Trinuclear complexes of palladium(ii) with chalcogenated N-heterocyclic carbenes: catalysis of selective nitrile-primary amide interconversion and Sonogashira coupling. Dalton Trans. 2017;46:13065-13076 pubmed publisher..The real catalytic species for the interconversion and coupling appear to be based on Pd(ii) and Pd(0), respectively. ..
- Bhaskar R, Sharma A, Yadav M, Singh A. Sonogashira (Cu and amine free) and Suzuki coupling in air catalyzed via nanoparticles formed in situ from Pd(ii) complexes of chalcogenated Schiff bases of 1-naphthaldehyde and their reduced forms. Dalton Trans. 2017;46:15235-15248 pubmed publisher..For Sonogashira coupling, the formation and role of such Pd-based NPs under aerobic conditions were observed for the first time. The complexes 1-4 showed the potential for reuse, as in the eighth cycle, conversion dropped by only 20%. ..