Enantioselective phase-transfer catalyzed alkylation of 1-methyl-7-methoxy-2-tetralone: an effective route to dezocine
作者:Ruipeng Li、Zhenren Liu、Liang Chen、Jing Pan、Weicheng Zhou
DOI:10.3762/bjoc.14.119
日期:——
In order to prepare asymmetrically (R)-(+)-1-(5-bromopentyl)-1-methyl-7-methoxy-2-tetralone (3a), a key intermediate of dezocine, 17 cinchona alkaloid-derived catalysts were prepared and screened for the enantioselective alkylation of 1-methyl-7-methoxy-2-tetralone with 1,5-dibromopentane, and the best catalyst (C7) was identified. In addition, optimizations of the alkylation were carried out so that
为了不对称地制备(R)-(+)-1-(5-溴戊基)-1-甲基-7-甲氧基-2-四氢萘酮(3a),制备了地佐辛的关键中间体17金鸡纳生物碱衍生催化剂并用1,5-二溴戊烷筛选1-甲基-7-甲氧基-2-四氢萘酮的对映选择性烷基化反应,并确定了最佳催化剂(C7)。另外,对烷基化进行了优化,使得该方法变得实用和有效。