Process for the preparation of antibacterial 7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene derivatives
申请人:HOECHST AKTIENGESELLSCHAFT
公开号:EP0257419A1
公开(公告)日:1988-03-02
Compounds la
with
R = H, protecting group
R1 = H, alkyl
R2 = H, protecting group or salts thereof are prepared by
(1) producing compound Ib
with
Z = -NHR3, -NR3R3, -NR1R 3, -R4, OH
R3 = protecting group
R4 = carboxyl activating group or-COZ being -CN by
(A) heating ll
(B) reacting IV
with III
y being a leaving group
(C) cyclising Va, Vb or Vc
(L1 = Cl, Br)
(D) cyclising VIa, Vlb, Vlc, Vld
X=O,S
R5 = Cl, Br
R6 = Cu(II), P(II) or Hg(II)
(E) cyclising Villa or Vlllb
L being a leaving group and (2) removing protecting groups, reacting COZ groups with ammonia or methylamine or converting COZ or CN groups into CONHR1,
(3) converting a compound la into another compound Ia. These penem compounds have antibacterial properties.
化合物 la
与
R = H、保护基
R1 = H、烷基
保护基团 R2 = H 的化合物或其盐的制备方法如下
(1) 生成化合物 Ib
与
z = -nhr3、-nr3r3、-nr1r 3、-r4、oh
R3 = 保护基
R4 = 羧基活化基团或-COZ 被-CN 通过
(A) 加热 ll
(B) 将 IV
与 III
y 为离去基团
(C) 环化 Va、Vb 或 Vc
(L1 = Cl、Br)
(D) 环化 VIa、Vlb、Vlc、Vld
X=O,S
R5 = Cl、Br
R6 = 铜(II)、铅(II)或汞(II)
(E) Villa 循环或 Vlllb 循环
L为离去基团,(2)去除保护基团,使COZ基团与氨或甲胺反应,或将COZ或CN基团转化为CONHR1、
(3) 将一种化合物 la 转化为另一种化合物 Ia。这些五价铬化合物具有抗菌特性。