发明授权
US3994883A Penicillin and cephalosporin intermediates 失效
青霉素和头孢菌素中间体

Penicillin and cephalosporin intermediates
摘要:
Novel penicillin and cephalosporin intermediates for the synthesis of 6-APA or 7-aminocephem compounds involving formation of a 6 or 7 phosphite amido compound and the conversion of such compound to a desired 6-APA or 7-aminocephem compound.
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