作者:Fan Yang、Tienan Jin、Ming Bao、Yoshinori Yamamoto
DOI:10.1016/j.tet.2011.08.084
日期:2011.12
An efficient and facile electrophilic iodocyclization for the synthesis of various O-, N-, and S-containing dihaloheterocycles has been developed. A wide range of the substituted propargyl alcohols having –OH, –NTs, and –SAc functional groups reacted with molecular iodine or bromoiodine at ambient temperature to produce the corresponding dihalogenated O-, N-, and S-containing five- and six-membered
已经开发了用于合成各种含O-,N-和S-的二卤代杂环的有效且容易的亲电碘代环化反应。在环境温度下,具有–OH,–NTs和–SAc官能团的广泛取代的炔丙醇与分子碘或溴碘反应生成相应的二卤代O-,N-和S-含有高至高收率的五元和六元杂环;在优化的溶剂条件下,各种在C4位带有–OH,–NTs和–SAc官能团的取代的丁-2-yn-1-one与环境温度下的碘或溴碘反应,得到相应的3,4-二碘和3-溴-4-碘取代的呋喃,吡咯和噻吩,产量高至高。已经研究了将所得的含碘或溴的产物进一步转化为可能用作有机材料中间体的聚芳族化合物。