Torquoselectivity in the electrocyclic conversion of benzocyclobutenes to o-xylylenes
作者:Charles W. Jefford、Gerald Bernardinelli、Ying Wang、David C. Spellmeyer、Andrzej Buda、K. N. Houk
DOI:10.1021/ja00030a005
日期:1992.2
conrotatory electrocyclic opening of benzocyclobutene to o-xylylene was studied by means of ab initio molecular orbital calculations. The theory developed earlier to predict the torquoselectivity of ring opening of J-substituted cyclobutenes was found to be applicable. Experimentally, the ring opening of several 7-substituted benzocyclobutenes, such as the cyano, methoxycarbonyl, and formyl derivatives was
通过从头算分子轨道计算研究了苯并环丁烯向邻二甲苯的旋转电环开环。发现较早开发的用于预测 J-取代环丁烯开环扭矩选择性的理论是适用的。通过实验,研究了几种 7-取代的苯并环丁烯的开环,例如氰基、甲氧基羰基和甲酰基衍生物。得到邻二甲苯,其中氰基或酯基向外旋转,而甲酰基向内旋转