In Tandem Enantioselective Intramolecular Heck‐Matsuda Reactions directly from Anilines
作者:Tomaz Henrique Duarte Chorro、Edson Leonardo Scarpa de Souza、Otto Daolio Köster、Ellen Christine Polo、Rafaela Costa Carmona、Vitor Hugo Menezes da Silva、João Marcos Batista Junior、Carlos Roque Duarte Correia
DOI:10.1002/adsc.202201313
日期:2023.1.24
yields up to 91% and enantiomeric ratios up to 97:3, including quaternary stereocenters. The in-tandem processes from anilines were compared to conventional Heck-Matsuda reactions using pre-synthesized aryldiazonium salts. With few exceptions, the reactions starting directly from the anilines afforded better overall yields and enantioselectivity, demonstrating the efficiency of the method.
开发了一种新的对映体选择性分子内策略,用于在类似串联的重氮化/Heck-Matsuda 工艺中直接从苯胺合成对映体富集的桥联苯并呋喃、不饱和螺苯并呋喃、2,3-二氢苯并呋喃和 2,3-二氢吲哚乙酸酯支架。该过程结合了原位苯胺的重氮化,然后是分子内 Heck-Matsuda 反应,因此跳过了可能不稳定或难以合成的芳基重氮盐的分离和纯化。该序列的实用性和稳健性通过合成 30 个复杂基序以高达 91% 的产率和高达 97:3 的对映体比率(包括四元立体中心)得到证明。将苯胺的串联过程与使用预合成芳基重氮盐的传统 Heck-Matsuda 反应进行了比较。除了少数例外,直接从苯胺开始的反应提供了更好的总产率和对映选择性,证明了该方法的效率。