Publications by authors named "Suman Mahala"
A catalytic one-pot cascade dehydrogenative cyclization of 1-(2-aminophenyl)ethanone using primary alcohols is presented. The reaction is catalyzed by an earth-abundant manganese pincer complex of NNSe ligand, without any solvent, additives, base, or hydrogen acceptor, liberating dihydrogen and water as the only byproducts. Compared to an earlier reported four-step dehydrogenative coupling protocol, only a single step is required to synthesize 2-aryl-2,3-dihydroquinolin-4(1)-ones.
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- A new series of NNS-donor ligands coordinated Ni(II) complexes were developed and used as catalysts to synthesize N-alkylated amines and 1,2-disubstituted benzimidazoles.
- The synthesis involved reacting specific thiophenols with a particular bromo compound, followed by coordination with nickel acetate, resulting in different octahedral nickel complexes.
- Among these complexes, C1 exhibited the highest catalytic activity for both N-alkylation reactions and benzimidazole synthesis, with yields reaching up to 92% and 94%, respectively, working through a mechanism involving hydrogen borrowing from benzyl alcohol.
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- A cobalt(II) complex (C1) was created using a specific ligand (L1) and was found to be stable and cost-effective.
- This complex was effective in catalyzing a reaction that combined 2-(2-aminophenyl)ethanols with benzyl alcohol derivatives, resulting in the production of 2-aryl-3-formylindole derivatives.
- Remarkably, this process required only a small amount of catalyst (5.0 mol%) and achieved yields of up to 87%, with the mechanism involving imine formation followed by cyclization.
Herein, we have reported the synthesis of a macrocyclic organosulfur ligand (L1) having a seventeen-membered macrocyclic ring. Subsequently, the corresponding trans-palladium complex (C1) of bulky macrocyclic organosulfur ligand (L1) was synthesized by reacting it with PdCl (CH CN) salt. The newly synthesized ligand and complex were characterized using various analytical and spectroscopic techniques.
View Article and Find Full Text PDFThis report describes the synthesis of a seventeen-membered macrocyclic ring containing ligand (L1) by the reaction of 1,8-bis(2-(chloromethyl)phenoxy)octane with selenium powder. The -palladium dichloride complex (C1) of the macrocyclic selenium ligand was synthesized from its reaction with the Pd(CHCN)Cl precursor. The formation of the ligand and complex was authenticated with the help of various analytical techniques like H and C{H} NMR, HRMS, FTIR, UV-visible spectroscopy, and elemental analysis.
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