申请人:Bristol-Myers Company
公开号:US04112230A1
公开(公告)日:1978-09-05
There is described the stereoselective total synthesis of novel .DELTA..sup.2,3 -1,4-morpholine-2-carboxylic acids possessing a fused .beta.-lactam ring in the 1,6-position and carrying a substituent cis to carbon 5 in the 7-position of the fused ring system represented by the general formula ##STR1## wherein Z is halo, hydroxyl, etherified hydroxyl or hydroxyl esterified with a carboxylic acid residue or a sulfonic acid residue and X is amino, azido or acylamino. Also included in the invention are compounds of formula I in which the carboxyl group at the 2-position is protected as by an easily cleavable ester group and salts of both the free acids and carboxyl-protected compounds of formula I. The compounds of formula I are potent antibacterial agents or are of use as intermediates in the preparation of such antibacterial agents.
本文描述了一种立体选择性的全合成方法,用于合成具有融合β-内酰胺环在1,6-位置上和携带一个位于融合环系中碳5的顺式取代基的新型Δ2,3-1,4-吗啉-2-羧酸,其通式表示为##STR1##其中Z是卤素,羟基,醚化羟基或羟基酯化为羧酸残基或磺酸残基,X是氨基,叠氮基或酰胺基。本发明还包括通式I中羧基位于2-位置的化合物,其被易于解离的酯基所保护,以及通式I中自由酸和羧基保护化合物的盐。通式I的化合物是强效抗菌剂,或者用于制备此类抗菌剂的中间体。