Regioselective α-Alkylation of Silyl Enolates using a Mild Catalyst- ZnCl<sub>2</sub>Doped on Acidic Alumina
作者:G. L. Kad、Vasundhara Singh、Anupam Khurana、Sangeeta Chaudhary、Jasvinder Singh
DOI:10.1080/00397919908085973
日期:1999.10
Abstract ZnCl2 doped acidic alumina used as a solid support acts as a better Lewis acid in the SNl reaction of trimethyl silyl enol ethers with 30, allylic and benzylic halides to yield exclusively the substituted product in excellent yields. This method has been employed for the synthesis of monocyclic sesquitepene hydrocarbon, (±)-β-bisabolene and a monoterpene, 2,6-dimethyl-7-octen-4-one.
摘要 ZnCl2 掺杂的酸性氧化铝用作固体载体,在三甲基甲硅烷基烯醇醚与 30、烯丙基和苄基卤化物的 SNl 反应中充当更好的路易斯酸,以优异的产率专门产生取代产物。该方法已被用于合成单环倍半萜烃、(±)-β-红没药烯和单萜、2,6-二甲基-7-辛烯-4-one。