Regioselective and stereoselective radical additions of arenethiols to various ynamides have been developed. Mixing ynamides and arenethiols in the presence of a catalytic amount of triethylborane affords the corresponding adducts, (Z)-1-amino-2-thio-1-alkenes, in excellent yields with high selectivities. The products can be reduced by means of trifluoroacetic acid and triethylsilane to yield 1-amino-2-thioalkanes.
研究人员开发出了壬
硫醇与各种亚
酰胺的区域选择性和立体选择性自由基加成。在一定量的三乙基
硼烷催化下,将炔
硫醇与炔
酰胺混合,可以得到相应的加合物--(Z)-1-
氨基-2-
硫代-1-
烯,产量极高,选择性极强。这些产物可通过
三氟乙酸和三乙基
硅烷还原生成 1-
氨基-2-
硫代
烷烃。