2-Substituted-6-substituted-1-carbadethiapen-2-em-3-carboxylic acids, processes for preparing them, antibiotic pharmaceutical compositions containing same and process for preparing intermediates
申请人:Merck & Co., Inc.
公开号:EP0017992A1
公开(公告)日:1980-10-29
Disclosed is a process for the total synthesis of 1-carbapenem antibiotics (I) from L-aspartic acid via intermediates II und III:
wherein R is hydrogen, a pharmaceutically acceptable ester moiety or salt cation, or a readily removable blocking group; R6 and R7 are, inter alia, independently selected from the group consisting of hydrogen, alkyl, alkenyl, aryl and aralkyl; Rl' is hydrogen or a protecting group; and Ra, Rb and Rc are independently selected from alkyl, aryl and aralkyl.
本发明公开了一种由 L-天冬氨酸通过中间体 II 和 III 全合成 1-碳青霉烯类抗生素 (I) 的工艺:
其中,R 是氢、药学上可接受的酯基或盐阳离子或易于去除的封端基;R6 和 R7 除其他外,独立地选自氢、烷基、烯基、芳基和芳烷基组成的组;Rl'是氢或保护基;Ra、Rb 和 Rc 独立地选自烷基、芳基和芳烷基。