The Ring Closure of Cyclopenta-1, 3-dien-5-yl-carbene to Benzvalene. A mechanistic study of an unusual carbene reaction
作者:Ulrich Burger、G�rard Gandillon、Jiri Mareda
DOI:10.1002/hlca.19810640323
日期:1981.4.29
to show that the classic intramolecular cyclopropanation is completely suppressed by the linear cheletropic ringclosure. MINDO/3 predicts the key carbene to have a bisected conformation in its singlet ground state. This ideally fulfills the stereoelectronic conditions for a carbene reaction of least motion. The influence of the methyl substituent upon that process is discussed.