A convenientsynthesis of 4-amino-7-(dialkylamino)pyrido[2,3-d]pyrimidines via cyclization of functionalized pyridines is reported. The preparation of the starting pyridinesfrom 3-amino-3-(dialkylaraino)propene-nitriles and ethoxymethylenemalononitrile is described.
据报道,通过官能化吡啶的环化,可以方便地合成4-氨基-7-(二烷基氨基)吡啶并[2,3- d ]嘧啶。描述了由3-氨基-3-(二烷基芳基)丙烯腈和乙氧基亚甲基丙二腈制备起始吡啶的方法。