Approaches to 1<i>H</i>-Cyclopropa[<i>l</i>]phenanthrenes. Eliminations with 1a,9b-Dihydro-1<i>H</i>-cyclopropa[<i>l</i>]phenanthrene Derivatives
作者:Paul Müller、Huong Can Nguyen Thi、Jean Pfyffer
DOI:10.1002/hlca.19860690412
日期:1986.6.18
Base-induced elimination of the sulfonium salt 2i in the presence of furan affords the addition products 7 and 8, derived from 1H-cyclopropa[l]phenanthrene (1) and the isomeric cyclopropene 5a(Scheme 3). Upon oxidation, the selenide 2c yields phenanthrene-9-methanol (9), presumably via1. No evidence for the intermediate 1 is obtained from sulfoxide pyrolysis with 2e, which leads to products formed