Preparation of substituted and disubstituted-pyridine-2,3-dicarboxylate
申请人:American Cyanamid Company
公开号:US04723011A1
公开(公告)日:1988-02-02
Pyridine-2,3-dicarboxylates of Formula I ##STR1## are prepared by reacting an alpha halo-beta keto ester of formula II ##STR2## with an alpha, beta-unsaturated aldehyde or ketone of formula III ##STR3## in the presence of a minimum of 2 molar equivalents of ammonium salt.
Process for the preparation of o-carboxypyridyl- and o-carboxyquinolylimidazolinones
申请人:AMERICAN CYANAMID COMPANY
公开号:EP0388620A1
公开(公告)日:1990-09-26
The present invention provides an improved process for the preparation of o-carboxypyridyl- and o-carboxyquinolylimidazolinones from their 2-methyl-o-carboxylate pyridine and quinoline precursors.
本发明提供了一种从 2-甲基-邻羧基吡啶和喹啉前体制备邻羧基吡啶和邻羧基喹啉咪唑啉酮的改进工艺。
OHTA, KAZUKO;IWAOKA, JUNKO;KAMIJO, YUKO;OKADA, MIDORI;NOMURA, YUJIRO, NIPPON-KAGAKU KAJSI,(1989) N, S. 1593-1600