- queteniminopenicilirato derivatives devoid of Therapeutic activity, only useful as Intermediates in the preparation of Derivatives of penicillinProcedures to prepare for and to obtain derivatives 6 Alpha metoxipenicilina therefrom

摘要

A class of ketenimine intermediates are prepared from 6-acylaminopenicillins having an alpha -carboxy substituent in the side-chain, and are useful in the preparation of 6 alpha -methoxy- alpha -carboxy penicillins.