申请人:Rhone-Poulenc Industries
公开号:US04369315A1
公开(公告)日:1983-01-18
New oxacephalosporins of the general formula ##STR1## in which R.sub.1 is a protective radical and (a) R.sub.4 is a substituted 2-(2-aminothiazol-4-yl)-acetyl radical of which the amine group is protected, or an .alpha.-carboxyarylacetyl radical, and R" is hydrogen or methoxy in the 7.alpha.-position, or alternatively (b) R.sub.4 is a protective radical and R" is hydrogen or methoxy in the 7.alpha.-position or hydrogen in the 7.beta.-position, in the form of a bicyclooct-2-ene or bicyclooct-3-ene or a 3-oxoethylidenebicyclooctane, are useful as intermediates for the preparation of pharmaceutically active oxacephalosporins.
新的氧头孢菌素通用式为##STR1##,其中R.sub.1是保护基,(a) R.sub.4是一种取代的2-(2-氨基噻唑-4-基)-乙酰基基团,其胺基受到保护,或者是一种α-羧基芳基乙酰基基团,而R"在7α-位上是氢或甲氧基,或者(b) R.sub.4是保护基,而R"在7α-位上是氢或甲氧基,或在7β-位上是氢,以双环辛-2-烯或双环辛-3-烯或3-氧乙基亚双环辛烷的形式存在,可作为制备具有药物活性的氧头孢菌素的中间体。