Aryl 2-propynyl acetates undergo smooth allylation with allylzinc bromide (generated in situ from allyl bromide and zinc metal) in THF at room temperature under mild conditions to furnish the corresponding 1,5-enynes in good to excellent yields and with high selectivity. Indium metal is also found to accomplish the nucleophilic substitution of aryl 2-propynylic acetates with allyl bromide.
苯基-2-
丙炔基
乙酸酯在温和条件下,在室温下的
四氢呋喃中,可以与烯丙基
锌溴(由烯丙基
溴和
锌金属现场生成)进行平滑的烯丙基化反应,以良好的至极好的产率和高度选择性得到相应的1,5-烯炔。此外,还发现,
铟金属也能够完成苯基-2-
丙炔亚乙酸酯与烯丙基
溴的亲核取代反应。