Efficient synthesis of 2- and 3-substituted indenes from 2-bromobenzyl bromide through an enolate alkylation/Cr(II)/Ni(II)-mediated carbonyl addition sequence
作者:Ronald L. Halterman、Chengian Zhu
DOI:10.1016/s0040-4039(99)01541-5
日期:1999.10
efficient new synthesis of 2- and 3-substituted indenes has been developed based on the nickel-catalyzed chromium(II)-promoted addition of aryl bromides to a tethered ketone carbonyl. Several tethered bromoaryl ketones were prepared through enolate alkylation of acyclic or cyclic ketones with 2-bromobenzyl bromide. Nozaki-Takai-Hiyama-Kishi closure of the resulting bromoaryl ketones followed by acid promoted
基于镍催化的铬(II)促进的芳基溴化物向束缚的酮羰基的加成反应,已开发出一种有效的新合成2-和3-取代的茚基的方法。通过用2-溴苄基溴对无环或环状酮进行烯丙基化烷基化反应,制得了几种束缚的溴代芳基酮。所得到的溴芳基酮的Nozaki-Takai-Hiyama-Kishi封闭,然后酸促进的脱水作用,使三步顺序的总收率得到取代的茚满,收率范围为29%至58%。