β-芳基或苯乙烯基 α、β-不饱和羧酸与过硫酸氢钾 (Ox-one)、氯化钠或溴化钠在乙腈 /水中反应 ,进行脱羧并卤代得到相应的保持原有构型的卤代烯烃 ,15例收率 40 %～ 97%。同样条件下碘代脱羧收率很低或不反应芳基或苯乙烯基α、β-不饱和酸的卤代脱羧@贺宝元 The reaction of β-aryl or styryl α, β-unsaturated carboxylic acids with ox-one, sodium chloride or sodium bromide in acetonitrile / water, decarboxylation and halogenation gives the corresponding retentive With the structure of halogenated olefins, 15 cases yield 40% ~ 97%. Under the same conditions iodine decarboxylation yield is very low or does not respond aryl or styrene α, β-unsaturated acid halogen decarboxylation He Bao yuan