Hydroxy-Directed Amidation of Carboxylic Acid Esters Using a Tantalum Alkoxide Catalyst
作者:Hiroaki Tsuji、Hisashi Yamamoto
DOI:10.1021/jacs.6b09482
日期:2016.11.2
the chemoselective synthesis of amides by using a metal-catalyzed hydroxy-directed reaction. A hydroxy group located at the β-position of an ester group promoted the activation of a carbonyl group with a tantalum alkoxide catalyst followed by amidation reactions, leading to a wide variety of β-hydroxyamides with excellent chemeselectivity. The chemoselective amidation strategy can be extended to the
我们在此描述了一种通过使用金属催化的羟基定向反应化学选择性合成酰胺的新策略。位于酯基 β 位的羟基促进了羰基在烷氧基钽催化剂下的活化,随后进行了酰胺化反应,从而产生了多种具有优异化学选择性的 β-羟基酰胺。化学选择性酰胺化策略可以扩展到二肽衍生物的催化合成,这在现代有机合成中仍然是具有挑战性的研究课题。