Regioselective β-Csp<sup>3</sup>-Arylation of β-Alanine: An Approach for the Exclusive Synthesis of Diverse β-Aryl-β-amino Acids
作者:Sushobhan Chowdhury、Roopal Vaishnav、Namita Panwar、Wahajul Haq
DOI:10.1021/acs.joc.8b02887
日期:2019.3.1
An approach for the synthesis of a variety of new β-aryl-β-amino acids has been developed via a palladium-catalyzed auxiliary-directed regioselective Csp3-H arylation of the unactivated β-methylene bond of β-alanine. The use of 8-aminoquinoline amide as an auxiliary efficiently directs the desired regioselective β-Csp3-H functionalization. The developed protocol enables the easy and straightforward
通过钯催化未活化的β-丙氨酸的β-亚甲基键的辅助定向的区域选择性Csp 3 -H芳基化,已经开发了用于合成多种新的β-芳基-β-氨基酸的方法。作为辅助使用8-氨基喹啉酰胺的有效引导所需区域选择性β-CSP 3 -H官能化。从廉价且易于获得的β-丙氨酸前体开始,开发的方案能够轻松,直接地获得几种可用于肽工程的高价值β-芳基-β-氨基酸,且产率中等至优异。