TCT-mediated click chemistry for the synthesis of nitrogen-containing functionalities: conversion of carboxylic acids to carbamides, carbamates, carbamothioates, amides and amines
作者:Riyaz Ahmed、Ria Gupta、Zaheen Akhter、Mukesh Kumar、Parvinder Pal Singh
DOI:10.1039/d2ob00324d
日期:——
s-trichlorotriazine (TCT, also known as cyanuric chloride) mediated one-pot general method for the conversion of carboxylic acids into ubiquitous functionalities such as carbamides, carbamates, carbamothioates, amides, and amines. The TCT-mediated activation of acids followed by azidation and heating led to the isocyanate formation via Curtius rearrangement which involves click chemistry in the presence of nucleophiles
在这里,我们报告了一种s-三氯三嗪(TCT,也称为三聚氯氰)介导的一锅通用方法,用于将羧酸转化为普遍存在的官能团,例如尿酰胺、氨基甲酸酯、氨基甲酸酯、酰胺和胺。TCT 介导的酸活化,然后是叠氮化和加热导致异氰酸酯通过Curtius 重排,涉及在亲核试剂存在下的点击化学并提供偶联产物。相对于起始材料,TCT 的使用量≤40 mol%;然而,它的大量可用性和低成本为其在功能分子合成中的适用性提供了独特的机会。优化的条件也已成功地用于克级合成和天然产物和药物(如鬼臼毒素、丁香酚、薯蓣皂苷元、香叶醇和氟伏沙明)的后期功能化。