C-terminal activation of N-acylated o-aminobenzoic acids and their derivatives during coupling reactions with amines would often pose a challenge due to the formation of a benzoxazinone intermediate, which may resist reacting with amines. This communication reports a mild approach towards the installation of an amide bond via benzoxazinone ring opening utilizing Schreiner's (thio)urea organocatalyst.
在与胺的偶联反应中,N-酰化
邻氨基苯甲酸及其衍
生物的 C 端活化通常会由于苯并恶嗪酮中间体的形成而面临挑战,该中间体可能会抵制与胺的反应。本研究报告介绍了一种温和的方法,即利用 Schreiner 的(
硫)
脲有机催化剂,通过苯并恶嗪酮开环来安装酰胺键。