The intramolecular reaction of acetophenone <i>N</i>-tosylhydrazone and vinyl: Brønsted acid-promoted cationic cyclization toward polysubstituted indenes
作者:Zhixin Wang、Yang Li、Fan Chen、Peng-Cheng Qian、Jiang Cheng
DOI:10.1039/d0cc07966a
日期:——
TsNHNH2, a Brønsted acid-promoted intramolecular cyclization of o-(1-arylvinyl) acetophenone derivatives was developed, leading to polysubstituted indenes with complexity and diversity in moderate to excellent yields. In sharp contrast with either the radical or carbene involved cyclization of aldehydic N-tosylhydrazone with vinyl, a cationic cyclization pathway was involved, where N-tosylhydrazone served
在存在TsNHNH 2的情况下,开发了布朗斯台德酸促进的邻-(1-芳基乙烯基)苯乙酮衍生物的分子内环化反应,导致多取代的茚并酮具有复杂性和多样性,产率中等至优异。与自由基或卡宾涉及醛基N-甲苯磺酰hydr与乙烯基的环化形成鲜明对比,涉及阳离子环化途径,其中N-甲苯磺酰zone在该转化过程中用作亲电试剂和烷基化试剂。