申请人:Pavey John
公开号:US20090036675A1
公开(公告)日:2009-02-05
There is provided a process for the preparation of a compound of formula I, (I), or a pharmaceutically acceptable derivative thereof, wherein A, B, G, R
1
, R
2
, R
3
, R
4
and R
41
to R
46
have meanings given in the description, which process comprises the dehydrative cyclisation of a compound of formula II, (II).
提供了一种制备I式化合物(I)或其药学上可接受的衍生物的方法,其中A、B、G、R1、R2、R3、R4和R41到R46具有所述描述中给出的含义,该方法包括化合物II(II)的脱水环化。