作者:Zezhou Wang、Shiyue Fang
DOI:10.1002/ejoc.200900819
日期:2009.11
Several simple bismuth(III) salts were screened for the suitability to catalyze the cycloisomerization of enynes. Among them, BiCl3 gave the best results. Under the optimized reaction conditions, eight substrates were studied, and acceptable to excellent isolated yields were obtained. Consistent with data in the literature, electron-deficient alkynes were found to be better substrates for the reaction
筛选了几种简单的铋 (III) 盐是否适合催化烯炔的环异构化。其中,BiCl3 给出了最好的结果。在优化的反应条件下,对8种底物进行了研究,获得了可接受的优良分离产率。与文献中的数据一致,发现缺电子炔比富电子炔是更好的反应底物。由于 BiCl3 容易获得、价格低廉且对环境无害,因此这种软路易斯酸催化的异构化反应有望成为有机化学家制备吡咯烷衍生物的不错选择。 (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)