Deconjugative α-Alkylation of Cyclohexenecarboxaldehydes: An Access to Diverse Terpenoids
作者:Rachid Chahboun、José Manuel Botubol-Ares、María Jesús Durán-Peña、Fermín Jiménez、Ramón Alvarez-Manzaneda、Enrique Alvarez-Manzaneda
DOI:10.1021/acs.joc.1c00560
日期:2021.7.2
A general and efficient method for the deconjugative α-alkylation of α,β-unsaturated aldehydes promoted by a synergistic effect between tBuOK and NaH, which considerably increases the reaction rate under mild conditions, is reported. The β,γ-unsaturated aldehyde, resulting from the α-alkylation, is transformed in high yield into the corresponding allyl acetate via a lead(IV) acetate-mediated oxidative
报道了一种通过t BuOK 和 NaH之间的协同作用促进 α,β-不饱和醛的去共轭 α-烷基化的通用且有效的方法,该方法在温和条件下显着提高了反应速率。由 α-烷基化产生的 β,γ-不饱和醛通过乙酸铅 (IV) 介导的氧化断裂以高产率转化为相应的乙酸烯丙酯。该策略可用于构建多种烷基或芳基萜类化合物的碳骨架。