Process for preparing penicillanic acid 1,1-dioxide derivatives and certain intermediates useful therein
申请人:PFIZER INC.
公开号:EP0061315A1
公开(公告)日:1982-09-29
A process for the preparation of penicillanic acid 1,1-dioxide derivatives of the formula:-
wherein X is Cl, Br, I or OSO2R1 where R1 is C1-C6 alkyl or C6H4R2 where R2 is H, Cl, Br, l, NO2, C1-C3 alkyl or C1-C3 alkoxy, by reducing a compound of the formula
wherein X is as defined for formula (I), n is zero, 1 or 2; Y and Z are each Cl, Br or l, orY is H and Z is selected from Cl, Br, l, C≡N- (isocyano) and SCN- (isothiocyanato), or
Y is SeC6H4R2 is as defined for formula (I), and Z is Cl or Br; with a specified reducing agent, followed by oxidation of a compound (VI) in which n is 0 or 1.
The compounds (I) are intermediates for the production of valuable antibiotics. Also included are certain novel intermediates particularly those of the formula :-
wherein X is Cl, Br, I or OSO2R1 where R' is C1-C6 alkyl or C6HaR2 where R2 is H, Cl, Br, l, NO2, C1-C3 alkyl or C1-C3 alkoxy; n is zero, 1 or2; Y1 is H and Z1 is C≡N- or SCN-, or Y1 is SeC6H4R2 and Z1 is Cl or Br, and R2 is H, Cl, Br, l, NO2, C1-C3 alkyl or C1-C3 alkoxy.
一种制备青霉烷酸 1,1-二氧化物衍生物的工艺,其式为
式中 X 为 Cl、Br、I 或 OSO2R1(其中 R1 为 C1-C6 烷基)或 C6H4R2(其中 R2 为 H、Cl、Br、l、NO2、C1-C3 烷基或 C1-C3 烷氧基),通过还原式化合物
其中 X 如式 (I) 所定义,n 为 0、1 或 2;Y 和 Z 分别为 Cl、Br 或 l,或 Y 为 H,Z 选自 Cl、Br、l、C≡N-(异氰酸基)和 SCN-(异硫氰酸基),或
Y 是 SeC6H4R2,如式(I)所定义,Z 是 Cl 或 Br;用指定的还原剂,然后氧化其中 n 为 0 或 1 的化合物(VI)。
化合物(I)是生产有价值抗生素的中间体。此外,还包括某些新型中间体,特别是式如下的中间体
其中 X 是 Cl、Br、I 或 OSO2R1,其中 R' 是 C1-C6 烷基或 C6HaR2,其中 R2 是 H、Cl、Br、l、NO2、C1-C3 烷基或 C1-C3 烷氧基;n 是 0、1 或 2;Y1 是 H,Z1 是 C≡N- 或 SCN-,或 Y1 是 SeC6H4R2,Z1 是 Cl 或 Br,R2 是 H、Cl、Br、l、NO2、C1-C3 烷基或 C1-C3 烷氧基。