The intramolecular cyclisation of tethered allyl bromides onto terminal alkynes mediated by metallic indium proceeds smoothly and cleanly in an mixture of THF and water to give unsaturated carbocycles and heterocycles in good yield. The reaction does not proceed efficiently under rigorously anhydrous conditions.
在
金属
铟的介导下,在
四氢呋喃和
水的混合物中,系链烯丙基
溴与末端
炔烃的分子内环化反应可顺利进行,并以良好的收率得到不饱和碳环和杂环。在严格的无
水条件下,反应不能有效进行。