PREPARATION OF ISOCOUMARIN DERIVATIVES AND INTERMEDIATES FOR THE SYNTHESIS THEREOF
申请人:Mercian Corporation
公开号:EP1364947A1
公开(公告)日:2003-11-26
A method of preparing optically active isocoumarin-3-yl-acetic acid derivatives represented by Formula (I):
wherein a specific isocoumarin-ketene derivative is subjected to an addition reaction with an optically active alcohol, and then the ester thus obtained is subjected to a hydrolysis reaction. An intermediate for synthesis used therein. A method of preparing isocoumarin-3-yl-acetic acid derivatives represented by Formula (III):
wherein a specific isocoumarin derivative is subjected to an addition reaction with carbon monoxide and oxygen in the presence of a transition metal catalyst. An intermediate for synthesis used therein.
Preparation of isocoumarin derivatives and intermediates for the synthesis thereof
申请人:——
公开号:US20040102639A1
公开(公告)日:2004-05-27
A method of preparing optically active isocoumarin-3-yl-acetic acid derivatives represented by Formula (I):
1
wherein a specific isocoumarin-ketene derivative is subjected to an addition reaction with an optically active alcohol, and then the ester thus obtained is subjected to a hydrolysis reaction. An intermediate for synthesis used therein. A method of preparing isocoumarin-3-yl-acetic acid derivatives represented by Formula (III):
2
wherein a specific isocoumarin derivative is subjected to an addition reaction with carbon monoxide and oxygen in the presence of a transition metal catalyst. An intermediate for synthesis used therein.