Intramolecular Diels–Alder reaction of 1-ethoxycarbonyl-4-alkenylcyclopentadienes
作者:Yuichiro Himeda、Kazuhisa Hiratani、Minoru Hatanaka、Ikuo Ueda
DOI:10.1039/c39920001684
日期:——
4-(But-3-enyl)- and 4-(pent-4-enyl)-1-ethoxycarbonyl-2-ethoxycyclopentadiene, prepared from allylidenetriphenylphosphorane and α-haloketones, underwent a regioselective intramolecular DielsâAlder reaction to give two types of the functionalized tricyclic products depending on the linking carbon-chain length.
4-(But-3-enyl)- 和 4-(pent-4-enyl)-1-ethoxycarbonyl-2-ethoxycyclopentadiene, 由烯丙基三苯基正膦和 α-卤代酮制备,经过区域选择性分子内 DielsâªAlder 反应得到两个官能化三环产物的类型取决于连接碳链的长度。