专利名称：Process for preparing 2-exo-methylenepenam derivatives
发明人：Sigeru Torii,Hideo Tanaka,Masatoshi
Taniguchi,Michio Sasaoka,TakashiShiroi,Yutaka Kameyama
申请号：US07/848939申请日：19920310公开号：US05196530A公开日：19930323
摘要：The present invention provides a process for preparing a 2-exo-methylenepenam derivative represented by the formula (2), the process being
characterized by reacting an allenyl &bgr;-lactum compound represented by the formula(1) with a metallic reducing agent, in which R. sup.1, R.sup.2, R.sup.3 and X are defined inthe specification. ##STR1##
申请人：OTSUKA KAGAKU KABUSHIKI KAISHA
代理机构：Armstrong, Westerman, Hattori, McLeland & Naughton
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