Esters as Acylating Reagent in a Friedel−Crafts Reaction: Indium Tribromide Catalyzed Acylation of Arenes Using Dimethylchlorosilane
作者:Yoshihiro Nishimoto、Srinivasarao Arulananda Babu、Makoto Yasuda、Akio Baba
DOI:10.1021/jo801914x
日期:2008.12.5
The Friedel-Crafts acylation of arenes with esters by dimethylchlorosilane and 10 mol % of indium tribromide has been achieved. The key intermediate RCOOSi(Cl)Me(2) is generated from alkoxy esters with the evolution of the corresponding alkanes. The scope of the alkoxy ester moiety was wide: tert-butyl, benzyl, allyl, and isopropyl esters were successful. In addition, we demonstrated the direct synthesis
已经通过二甲基氯硅烷和10mol%的三溴化铟实现了芳烃与酯的弗瑞德-克来福特酰化。关键中间体RCOOSi(Cl)Me(2)由烷氧基酯生成,并伴随有相应的烷烃生成。烷氧基酯部分的范围很广:叔丁基酯,苄基酯,烯丙基酯和异丙酯是成功的。此外,我们证明了由酯10直接合成丹参戊醇的茚满酮中间体11。