General approach to substituted naphtho[1,2-b]benzofurans via photochemical 6π-electrocyclization of benzofuranyl containing cinnamonitriles
作者:Boris V. Lichitsky、Turan T. Karibov、Valeriya G. Melekhina、Andrey N. Komogortsev、Artem N. Fakhrutdinov、Mikhail E. Minyaev、Michail M. Krayushkin
DOI:10.1016/j.tet.2021.132207
日期:2021.6
synthesis of naphtho[1,2-b]benzofurans based on photoinduced reaction of acrylonitriles containing 2-arylbenzofuran fragment as part of 1,3,5-hexatriene system. The considered reaction proceeds via initial 6π-electrocyclization followed by [1,9]-H sigmatropic shift and final oxidative aromatization of central benzene ring. It was shown that 5,6-dihydronaphtho[1,2-b]benzofurans are key intermediates of
首次,我们基于包含2-芳基苯并呋喃片段作为1,3,5-己三烯体系一部分的丙烯腈的光诱导反应,阐述了萘[1,2- b ]苯并呋喃的合成方法。所考虑的反应进行经由初始6π-electrocyclization接着[1,9] - ħ σ迁移位移和中心苯环的最终氧化芳构化。结果表明,5,6-二氢萘并[1,2- b ]苯并呋喃是所研究方法的关键中间体。得到的5,6-二氢萘并[1,2的结构b ]苯并呋喃和目标萘并[1,2-之一b ]苯并呋喃通过X射线衍射确认。