A rhodium-catalyzed carbonylative transformation of alkyl halides under low pressure of CO has been developed. This robust catalyst system allows using phenols as the carbonylative coupling partner and, meanwhile, exhibits high functional group tolerance and good chemoselectivity. Substrates even with a large steric hindrance group or multiple reaction sites can be selectively converted into the desired
Carbostyril compounds, compositions containing same and processes for preparing same
申请人:OTSUKA PHARMACEUTICAL CO., LTD.
公开号:EP0187322A1
公开(公告)日:1986-07-16
A carbostyril compound of the formula (I):
wherein
R1 and R2 are as defined or its pharmaceutically acceptable salt, composition containing the compound and processes for preparing the same are disclosed.
The compound is useful as a cardiotonic agent.