A 6-aminopenicillanic acid ester of the general formula I wherein R represents a methyl group or a phenyl group, or its acid addition salts.
The aminopenicillanic acid ester or its acid addition salts is prepared by reacting 6-aminopenicillanic acid or its salts at the carboxyl group with a compound of general formula III wherein R is as defined above and X represents a halogen atom, or by reacting 6-protected aminopenicillanic acid or its salt at the carboxyl group with the compound of general formula III and then converting the protected amino group of the reaction product to an amino group.
The present invention also provides the use of the aminopenicillanic acid ester of general formula I for the production of an Ampicillin ester of general formula II wherein R represents a methyl group or a phenyl group, or its acid addition salt.
通式 I 的
6-氨基青霉烷酸酯(其中 R 代表甲基或苯基)或其酸加成盐。
本发明的
氨基青霉烷酸酯或其酸加成盐是通过以下方法制备的:将
6-氨基青霉烷酸或其羧基上的盐与通式 III 的化合物反应(其中 R 如上定义,X 代表卤素原子),或将 6-保护
氨基青霉烷酸或其羧基上的盐与通式 III 的化合物反应,然后将反应产物的保护
氨基基团转化为
氨基基团。
本发明还提供了使用通式 I 的
氨基青霉烷酸酯生产通式 II 的
氨苄西林酯(其中 R 代表甲基或苯基)或其酸加成盐的方法。