作者:Qing-An Chen、Wei-Song Zhang、Yan-Cheng Hu
DOI:10.1055/s-0040-1707172
日期:2020.10
basic industrial feedstock isoprene is an ideal alternative precursor. However, given that electronically unbiased isoprene might undergo six possible addition modes in the coupling reactions, it is difficult to control the selectivity. This article summarizes the strategies we have developed to achieve regioselective C–H functionalizations of isoprene under transition-metal and acid catalysis. 1 Introduction
五碳二甲基烯丙基单元,如异戊二烯和反异戊二烯,广泛分布于天然吲哚生物碱和萜类化合物中。在传统方法中,这些有价值的基序通常来自带有离去基团的底物,但这些过程伴随着化学计量副产物的产生。从经济和环境的角度来看,基本工业原料异戊二烯是理想的替代前体。然而,考虑到电子无偏异戊二烯在偶联反应中可能经历六种可能的加成模式,很难控制选择性。本文总结了我们为在过渡金属和酸催化下实现异戊二烯的区域选择性 C-H 功能化而开发的策略。