A variety of epoxides underwent facile cleavage by thiols under the catalysis of 1-methyl-3-butylimidazolium bromide, [bmIm]Br, to produce the corresponding β-hydroxy sulfides with high regio- and stereo-selectivity. On the other hand, a specially designed basic ionic liquid, [bmIm]OH, efficiently catalyzes the thiolysis of α,β-epoxy ketones providing β-keto sulfides through simultaneous retro-aldol cleavages. The reactions are clean, high yielding, and do not require any organic solvent. The catalyst is also recycled.
在 1-甲基-3-丁基溴化咪唑鎓([bmIm]Br)的催化下,多种环氧化物很容易被硫醇裂解,从而以高区域和立体选择性生成相应的 β-羟基硫化物。另一方面,一种特殊设计的碱性离子液体 [bmIm]OH 可高效催化 α,β-环氧酮的硫解反应,通过同时发生的逆醛裂解提供 β-酮硫化物。该反应清洁、产率高,且不需要任何有机溶剂。催化剂也可回收利用。