申请人:Boehringer Ingelheim (Canada) Ltd.
公开号:US05925762A1
公开(公告)日:1999-07-20
##STR1## A very mild and efficient approach for the synthesis of ureas is described. Phenyl carbamates were used as intermediates for the preparation of N,N'- substituted ureas. The carbamates were treated with an approximate stoichiometric amount of amine in dimethyl sulfoxide at ambient temperature, generating the ureas in high yield. The reaction was simple, safe, fast, inexpensive, and amenable to large scale production of the product.
描述了一种用于合成脲的非常温和高效的方法。苯基氨基甲酸酯被用作合成N,N'-取代脲的中间体。在二甲基亚砜中,将氨基甲酸酯与近似的摩尔量胺在室温下处理,可以高产率地生成脲。这种反应简单、安全、快速、廉价,并且适用于产品的大规模生产。