Tandem conversion of aldoximes to N‐methylated amides with methanol in presence of a single Ru(II) catalyst is accomplished through the Ru(II)‐mediated rearrangement followed by the reductive N‐methylation. Employing this protocol, several aldoximes were directly transformed to the N‐methylated amidesusing methanol. Kinetic experiments with H218O advocated that the aldoxime is acted as the nucleophile
Cooperative ruthenium complex catalyzed multicomponent synthesis of pyrimidines
作者:Milan Maji、Sabuj Kundu
DOI:10.1039/c9dt04040d
日期:——
air and moisture stable rutheniumcomplexes were synthesized and characterized. The catalytic behaviors of these complexes were evaluated towards the multicomponent synthesis of highly substituted pyrimidines directly from various amidines, primary alcohols, and secondary alcohols. Among all the metal complexes, 2-hydroxypyridine and benzimidazole fragments containing complex A showed the best reactivity
them, Mn1 complex bearing a proton-responsive 2-hydroxypyridine-appended benzimidazole ligand was found to be highly effective for the synthesis of different N-heterocycles utilizing alcohols. Employing significantly lower catalyst loading (0.05 mol %), several substituted pyrimidines and quinolines were effectively synthesized. The lactim–lactam acid–base equilibrium of the 2-hydroxypyridine fragment