已经实现了通过K 2 CO 3促进卤代炔烃的氢硫醇化来温和有效地制备(Z)-β-卤代烯基硫化物,在高浓度下生产(Z)-β-溴和(Z)-β-氯代乙烯基硫化物。产生具有优异的区域和立体选择性的产物。该方法涵盖了多种底物,包括芳基和烷基卤代炔烃。有意义的是,它允许轻松访问立体定义的(Z)或(E)三取代的烯烃,其特征在于β-卤代烯基硫醚的卤化碳和碳硫键具有迭代交叉偶联。
An efficient synthesis of trisubstituted alkenes including 1,2-heterodisubstituted alkenes has been described. Reactions of thiols and amines with 1,1-dibromo-1-alkenes in the presence of TBAF·3H2O afford (Z)-2-bromovinyl sulfides and (Z)-2-bromovinyl amines regio- and stereoselectively. The reaction proceeds under catalyst-free conditions with high efficiency. The coupling reactions of the obtained