Treatment of α-bromo and α-iodoketones with aluminum chloride and ethanethiol gave rise to dithioacetals of the corresponding dehalogenated ketones. α-Chloro and α-fluoroketones were also dehalogenated with the same reagent system through in situ hard-soft affinity inversion.
α-
溴代和α-
碘代酮在
三氯化铝和
乙硫醇的作用下,生成了相应的脱卤酮的二
硫缩醛。α-
氯代和α-
氟代酮也通过同样的反应体系,实现了原位软硬亲和性反转,从而实现了脱卤反应。