申请人:IMPERIAL CHEMICAL INDUSTRIES PLC
公开号:EP0244143A2
公开(公告)日:1987-11-04
Compounds of the formulae:
wherein R¹, R², R³ and R⁴ have a wide range of values are described as useful intermediates in the preparation of pharmaceuticals, etc, in particular in the preparation of optically active β-hydroxy α-substituted carboxylic acids. Processes for their preparation are described.
式中的化合物
其中 R¹、R²、R³ 和 R⁴ 的值范围很广,是制备药物等,特别是制备光学活性 β-羟基 α-取代羧酸的有用中间体。本文介绍了其制备工艺。