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
在呋喃的存在下碱诱导的elimination盐2i的消除得到加成产物7和8,其衍生自1 H-环丙烷[ 1 ]菲(1)和异构体环丙烯5a (方案3)。氧化时,硒化物2c大概通过1生成菲9-甲醇(9)。从亚砜热解2e并没有获得中间体1的证据,亚砜导致2e通过自由基途径形成产物(方案5)。还原消除二砜3b将2g单砜还原一半,然后将其完全还原成环丙烷2和9-甲基菲(15),但没有中间体1的证据。