申请人:Rhone-Poulenc Industries
公开号:US04622393A1
公开(公告)日:1986-11-11
New 3-vinylcephalosporins of the general formula (I), ##STR1## in which n=0 or 1, R.sub.1 is a radical of the general formula (II), ##STR2## in which R.sub.4 is hydrogen or a protective radical and R.sub.5 represents a radical of the general formula (IIa) ##STR3## in which R.sup.a.sub.5 and R.sup.b.sub.5 are hydrogen or alkyl or together form an alkylene radical and R.sup.c.sub.5 is hydrogen or a protective radical, R.sub.2 is hydrogen, a protective radical or a radical which can easily be removed by an enzymatic method, and R.sub.3 is a halogen atom or a radical R'.sub.3 SO.sub.2 O-- or R".sub.3 CO--O--, in which radicals R'.sub.3 and R".sub.3 are substituted or unsubstituted alkyl or phenyl radicals, or alternatively R.sub.1 is a hydrogen atom or a radical of the general formula (II) in which R.sub.4 is defined as above and R.sub.5 is hydrogen, alkyl, vinyl, cyanomethyl or a protective radical, and R.sub.2 is defined as above, or R.sub.1 is hydrogen or a variously substituted acyl radical and R.sub.2 is hydrogen or a protective radical, and R.sub.3 is a halogen atom. These new products are useful as intermediates for the preparation of antibiotic cephalosporins.
通用式(I)的新3-乙烯头霉素,其中n=0或1,R.sub.1是通用式(II)的基团,其中R.sub.4是氢或保护基团,R.sub.5代表通用式(IIa)的基团,其中R.sup.a.sub.5和R.sup.b.sub.5是氢或烷基,或者一起形成烷基基团,R.sup.c.sub.5是氢或保护基团,R.sub.2是氢,保护基团或通过酶法容易去除的基团,R.sub.3是卤原子或基团R'.sub.3 SO.sub.2 O--或R".sub.3 CO--O--,其中基团R'.sub.3和R".sub.3是取代或未取代的烷基或苯基基团,或者R.sub.1是氢原子或通用式(II)的基团,其中R.sub.4如上定义,R.sub.5是氢、烷基、乙烯基、氰甲基或保护基团,R.sub.2如上定义,或者R.sub.1是氢或各种取代的酰基基团,R.sub.2是氢或保护基团,R.sub.3是卤原子。这些新产品可用作制备抗生素头孢菌素的中间体。