Carboxylation reaction of a highly functionalized vinylic anion: a case of unexpected stability and reactivity
摘要:
Attempts to prepare JNJ 26273364, a highly functionalized pyrazole-based CCK1 receptor antagonist, using a carboxylation reaction led to a series of unexpected results. This work demonstrated the unique reactivity and stability of the highly functionalized Z-alkene functionality present around the pyrazole. (C) 2009 Elsevier Ltd. All rights reserved.
Alpha,beta-unsaturated esters and acids by stereoselective dehydration
申请人:Deng Xiaohu
公开号:US20060004195A1
公开(公告)日:2006-01-05
There are provided by the present invention certain pyrazole based CCK-1 receptor modulators which have the general formula:
wherein Ar is an aromatic or heteroaromatic group, X is a hydrocarbon linker, Y is a bond or hydrocarbon linker and R
1
, R
2
, R
3
, R
4
and R
5
are certain organic substituents, methods for making the same, and stereoselective dehydration methods for generally making α,β-unsaturated esters, acids and their derivatives.