申请人:——
公开号:US20030220517A1
公开(公告)日:2003-11-27
A novel process affords &ohgr;-ketocarboxylic acid derivatives of the formula (I)
1
in which
R
1
, R
2
, R
3
, and n are as defined in the description
by reaction of compounds of the formula (II)
2
with compounds of the formula (III)
3
or with compounds of the formula (IV)
4
in which
m is as defined in the description
in anhydrous hydrogen fluoride, if appropriate in the presence of boron trifluoride.
Novel &ohgr;-ketocarboxylic acid derivatives of the formula (If)
5
in which
R
1-1
, R
2−1
, R
3−1
and q are as defined in the description.
一种新的工艺通过化合物(II)2的反应与化合物(III)3或化合物(IV)4在无水氢氟酸中(必要时在三氟化硼存在下)制备了式(I)1的&ohgr;-酮羧酸衍生物,其中R1、R2、R3和n如描述中定义。新的&ohgr;-酮羧酸衍生物的化学式为(If)5,其中R1-1、R2-1、R3-1和q如描述中定义。