Strategy To Prepare 3-Bromo- and 3-Chloropyrazoles
作者:Richard J. Fox、Michael A. Schmidt、Martin D. Eastgate
DOI:10.1021/acs.joc.7b03282
日期:2018.3.2
A general strategy to prepare substituted 3-bromo- and 3-chloropyrazoles is described. The three-step method involves condensation of crotonates or β-chloro carboxylic acids with hydrazines, followed by halogenation and oxidation. Several condensation and oxidation protocols were developed to enable preparation of a wide variety of 3-halopyrazoles with good to excellent yields and regiocontrol.
Di(hetero)arylcyclohexane derivatives, their preparation, their use and pharmaceutical compositions comprising them
申请人:BOHME Thomas
公开号:US20100204206A1
公开(公告)日:2010-08-12
Di(hetero)arylcyclohexane derivatives, their preparation, their use and pharmaceutical compositions comprising them
The present invention relates to di(hetero)arylcyclohexane derivatives of the formula I,
in which Ar
1
, Ar
2
, R
1
and R
2
have the meanings indicated in the claims. The compounds of the formula I are valuable pharmaceutical active compounds which inhibit ATP-sensitive potassium channels in the heart muscle and are suitable, for example, for the treatment of disorders of the cardiovascular system such as arrhythmias or a decreased contractility of the heart, such as can occur, for example, in coronary heart disease, cardiac insufficiency or cardiomyopathies. In particular, they are suitable for the prevention of sudden cardiac death. The invention furthermore relates to processes and intermediates for the preparation of the compounds of the formula I, their use and pharmaceutical compositions comprising them.