Traceless synthesis of quinazoline-2,4-diones by curtius rearrangement reaction using poly(ethylene glycol) as soluble polymeric support
作者:Yanling Huang、Cuifen Lu、Zuxing Chen、Guichun Yang
DOI:10.1002/jhet.5570440628
日期:2007.11
We have developed an efficient method to synthesize various quinazoline-2,4-diones using poly-(ethylene glycol) as soluble polymeric support. The procedure of this reaction included: formation of acyl azide, efficient Curtius rearrangement, nucleophlic addition with amines to produce ureas, cyclization and concurrent cleavage of the resulted six-membered heterocycle from PEG-support in excellent yields
我们已经开发出一种有效的方法,可以使用聚(乙二醇)作为可溶性聚合物载体来合成各种喹唑啉-2,4-二酮。该反应的程序包括:酰基叠氮化物的形成,有效的库尔修斯重排,与胺的核苷加成以产生脲,环化并同时以优异的产率从PEG-载体上裂解所得的六元杂环。该方法温和且易于操作。