Copper-catalyzed three-component synthesis of pyrimidines from amidines and alcohols
作者:Tianchao Shi、Feng Qin、Qian Li、Wu Zhang
DOI:10.1039/c8ob02694g
日期:——
An efficient copper-catalyzed one-pot three-component reaction of amidines, primary alcohols and secondary alcohols has been developed to synthesize multisubstituted pyrimidines. The significant merits of this method involve high atom efficiency, good functional group tolerance and operational simplicity.
One-Pot Coupling–Coupling–Cyclocondensation Synthesis of Fluorescent Pyrazoles
作者:Alissa C. Götzinger、Florian A. Theßeling、Corinna Hoppe、Thomas J. J. Müller
DOI:10.1021/acs.joc.6b01326
日期:2016.11.4
ondensation syntheses of pyrazoles and pyrimidines were developed by taking advantage of the provisional, sequentially Pd-catalyzed one-pot generation of alkynones from aryl iodides, ethynylmagnesium bromide, and acid chlorides. This one-pot methodology allows the concise, diversity-oriented generation of a set of donor-, acceptor-, and donor–acceptor-substituted pyrazoles, which are interesting fluorophores
Acceptorless Dehydrogenative Synthesis of Pyrimidines from Alcohols and Amidines Catalyzed by Supported Platinum Nanoparticles
作者:Sharmin Sultana Poly、S. M. A. Hakim Siddiki、Abeda S. Touchy、Kah Wei Ting、Takashi Toyao、Zen Maeno、Yasuharu Kanda、Ken-ichi Shimizu
DOI:10.1021/acscatal.8b02814
日期:2018.12.7
Pt-catalyzed acceptorless dehydrogenation of the alcohol substrate, which is followed by sequential condensation, cyclization, and dehydrogenation. Measurements of the turnover frequency combined with the results of density functional theory calculations on different metal surfaces suggest that the adsorption energy of H on the Pt surface is optimal for the acceptorless dehydrogenation process, which causes
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