申请人:Rhone-Poulenc Industries
公开号:US04307230A1
公开(公告)日:1981-12-22
Novel 3-vinyl-cephalosporins of the formula ##STR1## in which n is 0 or 1, R.sub.1 is hydrogen, a radical of the formula ##STR2## [in which R.sub.4 is hydrogen or a protective radical and R.sub.5 is hydrogen, alkyl, vinyl or cyanomethyl or is a protective radical], or a protective radical, and R.sub.2 is hydrogen, a protective radical or an enzymatically removable radical, or R.sub.1 is hydrogen or an acyl radical which may carry various substituents and R.sub.2 is hydrogen or a protective radical, and R.sub.3 is a radical of the general formula R'.sub.3 --SO.sub.2 --O-- or R".sub.3 --CO--O--, in which R'.sub.3 is alkyl, trifluoromethyl, trichloromethyl or phenyl which is substituted by a halogen atom or by an alkyl or nitro radical, and R".sub.3 is defined like R'.sub.3 or represents methyl which is substituted by acyl or alkoxycarbonyl, or represents ethyl or propyl substituted in the 2-position by acyl or alkoxycarbonyl. These compounds are useful as intermediates for the preparation of antibiotic 3-thiovinyl-cephalosporins.
新型3-乙烯基头孢菌素化合物,其通式为##STR1##,其中n为0或1,R1为氢、通式##STR2##的基团[其中R4为氢或保护基团,R5为氢、烷基、乙烯基或氰甲基或为保护基团],或为保护基团,R2为氢、保护基团或酶可去除的基团,或者R1为氢或可能带有各种取代基的酰基基团,R2为氢或保护基团,R3为一般通式R'3--SO2--O--或R''3--CO--O--的基团,其中R'3为烷基、三氟甲基、三氯甲基或被卤素原子或烷基、硝基取代的苯基,R''3定义同R'3或代表被酰基或烷氧羰基取代的甲基,或代表在2位被酰基或烷氧羰基取代的乙基或丙基。这些化合物作为制备抗生素3-硫代乙烯基头孢菌素的中间体具有应用价值。