Synthesis of 8-substituted xanthines via 5,6-diaminouracils: an efficient route to A2A adenosine receptor antagonists
作者:Ma Dong、Mikhail Sitkovsky、Amy E. Kallmerten、Graham B. Jones
DOI:10.1016/j.tetlet.2008.05.071
日期:2008.7
A one-pot route to 8-substituted xanthines has been developed from 5,6-diaminouracils and carboxaldehydes. The process, promoted by (bromodimethyl)sulfonium bromide, is mild and efficient and eliminates the need for external oxidants. Yields are good and the process is applicable to a range of substrates including a family of A2A adenosine receptor antagonists. Preparation of a new analog of the antagonist
由5,6-二氨基尿嘧啶和羧醛开发了一种一锅法制备8-取代的黄嘌呤的方法。由(溴二甲基)溴化promote促进的该方法温和有效,并且不需要外部氧化剂。收率良好,并且该方法适用于多种底物,包括A 2A腺苷受体拮抗剂家族。介绍了拮抗剂KW-6002的新类似物的制备,并证明了芳基取代产物的原位溴化。