When α,α-dibromomethyl ketones are treated with sodium thiolates only the α-monosulfenylated ketones are formed. Evidence is put forward that the reaction mechanism proceeds by an initial nucleophilic substitution of one bromo atom and reduction by single electron transfer (SET) - hydrogen atom abstraction of the second bromo atom.
当用
硫醇
钠处理α,α-二
溴甲基酮时,仅形成α-单亚磺酰基化的酮。提出的证据表明,反应机理是通过一个
溴原子的初始亲核取代并通过单电子转移(
SET)-第二个
溴原子的氢原子抽象而还原而进行的。