C–N Coupling of Amides with Alcohols Catalyzed by N-Heterocyclic Carbene–Phosphine Iridium Complexes
作者:Sutthichat Kerdphon、Xu Quan、Vijay Singh Parihar、Pher G. Andersson
DOI:10.1021/acs.joc.5b01324
日期:2015.11.20
N-Heterocycliccarbene–phosphineiridiumcomplexes (NHC–Ir) were developed/found to be a highly reactive catalyst for N-monoalkylation of amides with alcohols via hydrogen transfer. The reaction produced the desired product in high isolated yields using a wide range of substrates with low catalyst loading and short reaction times.
Biaromatic compound activators of PPARy-type receptors
申请人:GALDERMA RESEARCH & DEVELOPMENT S.N.C.
公开号:US20040039038A1
公开(公告)日:2004-02-26
The invention relates to novel biaromatic compounds which correspond to the general formula (I) below:
1
and also to the method for preparing them and their use in pharmaceutical compositions intended for use in human or veterinary medicine (in dermatology, and also in the field of cardiovascular diseases, immune diseases and/or diseases associated with lipid metabolism), or alternatively in cosmetic compositions.
A new protocol for the synthesis of amides via base-promoted cleavage of the C(sp)–C(CO) bond of ynones with aliphatic primary and secondary amines under transition-metal-, ligand-, and oxidant-free conditions has been developed. This method exhibits a wide substrate scope, high functional group tolerance and exclusive chemoselectivity, as well as mild reaction conditions.
Biaromatic compound activators of PPARγ-type receptors
申请人:Bernardon Jean-Michael
公开号:US06927228B2
公开(公告)日:2005-08-09
The invention relates to novel biaromatic compounds which correspond to the general formula (I) below:
and also to the method for preparing them and their use in pharmaceutical compositions intended for use in human or veterinary medicine (in dermatology, and also in the field of cardiovascular diseases, immune diseases and/or diseases associated with lipid metabolism), or alternatively in cosmetic compositions.
A heteroditopic NHC and phosphine ligand supported ruthenium(<scp>ii</scp>)-complex: an effective catalyst for the <i>N</i>-alkylation of amides using alcohols
作者:S. N. R. Donthireddy、Vivek Kumar Singh、Arnab Rit
DOI:10.1039/d2cy00544a
日期:——
A ruthenium(II) complex of a chelated heteroditopic N-heterocycliccarbene ligand in combination with a phosphine ligand was uncovered to be a highly effective catalyst for the N-alkylation of diverse amides using readily available primaryalcohols. A wide range of secondary amides was thus obtained in excellent yields (up to 98%) employing a low catalyst (2c) loading of 0.2 mol% and a substoichiometric
发现螯合的杂二位N-杂环卡宾配体与膦配体的钌 ( II ) 配合物是使用现成的伯醇对各种酰胺进行N-烷基化的高效催化剂。因此,使用 0.2 mol% 的低催化剂 ( 2c ) 负载量和亚化学计量量的碱,以优异的产率(高达 98%)获得范围广泛的仲酰胺。1 H NMR 和 ESI - MS 分析支持N-杂环卡宾和磷化氢在催化循环中支持Ru-H物质,包括氘标记实验在内的机理研究表明涉及借氢方案。此外,目前的催化体系还被证明对 4-氨基苯甲酰胺的选择性单烷基化和不对称二烷基化是有效的,这在我们所知的范围内之前尚未研究过。