Alkynyl vinyl sulfides are prepared in good yield by reaction of lithium  acetylides with the unsaturated sulfenamides 4 which in turn are easily  synthesized by addition of phthalimidosulfenyl chloride to alkynes. In all cases  the reaction occurs without effecting the stereochemistry of the double bond.
                                    通过乙酰化
锂与不饱和亚磺酰胺 4 的反应,可以制备出产率很高的炔基
乙烯基硫化物。在所有情况下,反应的发生都不会影响双键的立体
化学。