Improved process for the preparation of dihydro-1H-pyrrolizine-3,5-(2H,6H)-dione
申请人:WARNER-LAMBERT COMPANY
公开号:EP0238088B1
公开(公告)日:1990-10-31
US4663464A
申请人:——
公开号:US4663464A
公开(公告)日:1987-05-05
Volhard, Justus Liebigs Annalen der Chemie, 1889, vol. 253, p. 232
作者:Volhard
DOI:——
日期:——
Process for the preparation of dihydro-1H-pyrrolizine-3,5-(2H,6H)-dione
申请人:Warner-Lambert Company
公开号:US04663464A1
公开(公告)日:1987-05-05
Dihydro-1H-pyrrolizine-3,5-(2H,6H)-dione is produced in higher overall yield in a process which comprises catalytically hydrogenating a lower alkyl ester of 4-(hydroxyimino)heptanedioic acid in the presence of a tri-(lower alkyl)amine, followed by cyclization of the product thus produced in the presence of a cyclizing agent such as acetic anhydride.