Halogen-Mediated Cascade Cyclization Reaction of Aryldiynes to Indeno[1,2-<i>c</i>]chromene Derivatives
作者:Chin-Chau Chen、Man-Yun Wu、Hsing-Yin Chen、Ming-Jung Wu
DOI:10.1021/acs.joc.7b00538
日期:2017.6.16
halogenated indeno[1,2-c]chromene derivatives is described. Treatment of aryldiynes 1 with one equivalent of iodine gave iodinated indeno[1,2-c]chromenes 3 in good chemical yields. When two equivalents of iodine were employed into the reaction mixture, dimer 9 was obtained as the major products. On the other hand, reaction of two equivalents of CuBr2 with compounds 1 gave the brominated indeno[1,2-c]chromenes
描述了芳基二炔的卤素介导的环化反应以产生卤化的茚并[1,2- c ]亚甲基衍生物。用一当量的碘处理芳基二炔1可以得到良好的化学收率的碘化茚并[1,2- c ]苯二酮3。当将两当量的碘用于反应混合物中时,获得二聚体9作为主要产物。在另一方面,溴化亚铜的两个当量的反应2用化合物1,得到溴化茚并[1,2- c ^ ]苯并吡喃4。为了了解取代基如何影响环化途径,对含甲氧基,羧基,氨基和硫化物取代基的分子进行了碘介导的环化反应的DFT计算。