Cyclopentenones from 1,2-disiloxycyclobutene via silylated 1-vinylcylopropanols. Application to the synthesis of dihydrojasmone and cis-jasmone
作者:J. Salaün、Y. Almirantis
DOI:10.1016/s0040-4020(01)91969-6
日期:1983.1
An effective synthesis of 2,3-disubstituted 2-cyclopentenones involves C4→C3 ring contraction of the readily available 1,2-disiloxycyclobutene followed by thermal C3→C5 ring enlargement of trimethylsiloxyvinyl-cyclopropanes. To illustrate the convenience of this new approach the total syntheses of 2-methyl-3-p-tolyl-2-cyclopentenone, dihydrojasmone. and cis-jasmone are reported.
2,3-二取代的2-环戊烯酮的有效合成涉及容易获得的1,2-二甲硅烷氧基环丁烯的C 4 →C 3环收缩,然后使三甲基甲硅烷氧基乙烯基-环丙烷的C 3 →C 5环热扩大。为了说明这种新方法的便利性,合成了2-甲基-3-对甲苯基-2-环戊烯酮二氢茉莉酮。与顺-jasmone报告。