A high-yielding, expeditious, and multicomponent synthesis of urea and carbamate derivatives by using triphenylphosphine/trichloroisocyanuric acid system
作者:Sara S. E. Ghodsinia、Batool Akhlaghinia
DOI:10.1080/10426507.2015.1085038
日期:2016.1.2
GRAPHICAL ABSTRACT Abstract An efficient method for the synthesis of urea and carbamate derivatives from amines and alcohols is described by using triphenylphosphine (PPh3)/trichloroisocyanuric acid system. The protocol allows for the preparation of symmetrical, unsymmetrical di, tri-, and tetra-substituted ureas and carbamates and is tolerant of a wide range of functional groups. To optimize the reaction
图形摘要摘要描述了使用三苯基膦(PPh3)/三氯异氰尿酸系统从胺和醇合成脲和氨基甲酸酯衍生物的有效方法。该协议允许制备对称、不对称的二、三和四取代脲和氨基甲酸酯,并且可以容忍广泛的官能团。为了优化反应条件,研究了温度、胺和醇的浓度、溶剂和反应时间等实验变量。在优化的条件下获得了令人满意的产量。本方法在实验上简单、温和,是现有方法的一种有价值的替代方法。