Process for the stereospecific synthesis of optically pure
申请人:Sanofi, S.A. and Institut National de la Sante et de la Recherche
公开号:US04978759A1
公开(公告)日:1990-12-18
The process described makes it possible to obtain optically pure 4-amino-3-hydroxycarboxylic acids by means of a series of stereoselective steps. The starting material is an alpha-amino acid in the L or D configuration, with which Meldrum's acid is reacted. The resulting pyrrolone derivative is reduced prior to opening of the pyrrolidine ring. The invention also relates to the new products obtained by the said process and to the pyrrolone derivatives obtained as intermediates.