A Catalyst-Free Process for the Direct Oxidative Synthesis of Formanilides from Arylamines and Aldehydes under Air Atmosphere
摘要:
An efficient and catalyst-free process for the direct oxidative synthesis of formanilides from primary aromatic amines and aliphatic aldehydes has been developed under mild aerobic oxidation conditions. The isotope-labeling experiments indicated that the oxygen atom of the formanilide originated from dioxygen.
The present invention relates to CCR5 receptor antagonists of formulae (1a) or (1b):
1
enantiomers, diastereomers, salts and solvates thereof wherein R
1
, R
2
, R
3
, R
4
, R
5
, and R
7
are as defined herein. The invention further includes a method of CCR5-mediated disorders employing such compounds.
PYRIDINYL-PYRAZOLE DERIVATIVES AND THEIR USE AS POTASSIUM CHANNEL MODULATORS
申请人:Eriksen Birgitte L.
公开号:US20100035934A1
公开(公告)日:2010-02-11
This invention relates to novel pyridinyl-pyrazole derivatives and their use as potassium channel modulating agents. Moreover the invention is directed to pharmaceutical compositions useful for the treatment or alleviation of diseases or disorders associated with the activity of potassium channels.
The present invention provides a pharmaceutical composition for use as art NPY Y5 receptor antagonist comprising a compound or the formula (I):
wherein R
1
is lower alkyl, cycloalkyl or the like,
R
2
is hydrogen, lower alkyl or the like,
n is 1 or 2,
X is lower alkylene, lower alkenylene, arylene, cycloalkylene or the like,
Y is CONR
7
, CSNR
7
, NR
7
CO, NR
7
CS or the like,
Z is lower alkyl, optionally substituted carbocyclyl, optionally substituted heterocyclyl or the like and R
7
is hydrogen or lower alkyl,
prodrug, pharmaceutically acceptable salt or solvate thereof.
Heteroditopic Chelating NHC Ligand-Supported Co<sup>III</sup> Complexes: Catalysts for the Reductive Functionalization of Carbon Dioxide under Ambient Conditions
作者:Misba Siddique、Biswaranjan Boity、Arnab Rit
DOI:10.1021/acs.organomet.2c00670
日期:2023.6.26
equally effective. It is worth mentioning that this is the first report on the effective N-formylation of less nucleophilic aromatic primary amines by employing a homogeneous Co complex, to the best of our knowledge. In addition, control experiments suggest that this protocol proceeds via Co hydride and formoxysilane intermediate formation.
报道了异二位螯合 NHC 配体支持的空气稳定 Co III –NHC 配合物 ( 1a – d ) 的合成和表征,该配合物具有可变的三唑 N-取代基,因此结构可调。据观察,这些络合物是非常有效的催化剂,可在环境条件下(1 bar CO 2压力和室温)产生不同的N-甲酰化胺,重要的是,发现配合物的催化活性可以通过三唑N-取代基进行合理调节,这可能是由于电化学分析支持的一些电子调制,而不是比埋藏体积百分比计算表明的任何显着的空间变化。值得注意的是,原位生成了相应的 Co III –NHC 配合物也发现同样有效。值得一提的是,据我们所知,这是第一篇关于使用均相 Co 配合物对亲核性较低的芳香伯胺进行有效 N-甲酰化的报道。此外,对照实验表明该方案通过钴氢化物和甲氧基硅烷中间体的形成进行。
N-Heterocyclic carbene supported zinc catalysed <i>N</i>-formylation of diverse N–H functionalities with carbon dioxide under ambient conditions
作者:Sangita Sahoo、Subarna Manna、Arnab Rit
DOI:10.1039/d3cy00401e
日期:——
A heteroditopic NHC ligand supported Zn-catalysed RT N-formylation of diverse N–H moieties with CO2 (1 bar) using PhSiH3 was developed, which offers excellent functional group tolerance, chemoselectivity, and synthons for biologically relevant compounds.