l-Proline promoted cross-coupling of vinyl bromide with thiols catalyzed by CuBr in ionic liquid
作者:Yunfa Zheng、Xingfen Du、Weiliang Bao
DOI:10.1016/j.tetlet.2005.11.164
日期:2006.2
the coupling of vinyl bromides with thiols using the copper(I) bromide as catalyst and l-proline as ligand was reported. The best yields were obtained in the ionic liquid [Bmim]BF4 with the retention of stereochemistry. This protocol is palladium-free, tolerates both aromatic and aliphatic thiols, possesses good selectivity between alcohol and thiol, and does not require the use of expensive or air-sensitive
报道了一种以溴化铜(I)为催化剂,以l-脯氨酸为配体,通过使溴化乙烯与硫醇偶合来合成硫化乙烯的方法。在离子液体[Bmim] BF 4中获得了最佳收率,并且保留了立体化学。该方案不含钯,可耐受芳族和脂族硫醇,在醇和硫醇之间具有良好的选择性,并且不需要使用昂贵或对空气敏感的添加剂。