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 electrocyclicopening of benzocyclobutene to o-xylylene was studied by means of ab initio molecular orbital calculations. The theory developed earlier to predict the torquoselectivity of ringopening of J-substituted cyclobutenes was found to be applicable. Experimentally, the ringopening of several 7-substituted benzocyclobutenes, such as the cyano, methoxycarbonyl, and formyl derivatives was