申请人:IMPERIAL CHEMICAL INDUSTRIES PLC
公开号:EP0065354A1
公开(公告)日:1982-11-24
Halohydrins of the formula:
wherein R and R1, which may be the same or different, are hydrogen or alkyl; X, Y and Z are each independently hydrogen, fluorine or chlorine and A is chlorine or bromine, are prepared by reacting a tertiary alcohol of the formula
or a substituted alkene of the formula
with chlorine, bromine, hypochlorous acid or hypobromous acid in an aqueous medium. Preferably the aqueous medium is a mixture of water and an amide solvent selected from dimethyl formamide, diethyl formamide and dimethyl acetamide and the reaction is carried out in the presence of hydrogen peroxide.
The halohydrins are useful intermediates for fungicides.
式中的 R 和 R1(可以相同或不同)是氢或烷基;X、Y 和 Z 各自独立地是氢、氟或氯,A 是氯或溴。 水介质最好是水和选自二甲基甲酰胺、二乙基甲酰胺和二甲基乙酰胺的酰胺溶剂的混合物,反应在过氧化氢存在下进行。 卤化烃是杀真菌剂的有用中间体。