HFIP as Protonation Reagent and Solvent for Regioselective Alkylation of Indoles with All-Carbon Centers
作者:Heng Song、Hu Zhou、Yang Shen、Hao Wang、Hua Song、Xingwei Cai、Chen Xu
DOI:10.1021/acs.joc.1c02412
日期:2022.1.21
(HFIP) as the protonation reagent and solvent. The catalytic reactions are operationally simple and green compared with previous reports utilizing elaborated olefins and catalysts. This protocol allows for alkylation of a variety of substituted indoles with diverse of styrene type alkenes in excellent yields and with high selectivity. Application of this protocol to the synthesis of drug was pursued and
C(sp 2 )–C(sp 3 )在 C3 位具有全碳中心的吲哚的区域选择性和化学选择性构建,一种多功能的生物活性结构单元) 通过使用六氟异丙醇 (HFIP) 作为质子化试剂和溶剂来实现与烯烃的形成。与使用精制烯烃和催化剂的先前报道相比,催化反应操作简单且绿色。该协议允许以优异的产率和高选择性对各种取代的吲哚与各种苯乙烯型烯烃进行烷基化。该协议在药物合成中的应用得到了追求,与现有技术相比,产量有所提高。催化动力学和氘标记实验表明,速率决定步骤涉及通过 HFIP 将烯烃质子化以产生碳正离子,然后与吲哚衍生物进行亲电加成。