一锅合成使用5-氨基吡唑衍生物1与乙氧基亚甲基丙二腈(EMMN),乙氧基亚甲基氰基乙酸乙酯(EMCA)或乙氧基亚甲基丙二酸二乙酯(DEMM)得到吡唑并-[1,5- a ]嘧啶化合物2,4,8。同样,EMCA与水合肼的一步反应得到(4-乙氧基羰基-5-吡唑基)氨基亚甲基氰基乙酸乙酯3c。另一方面,1-取代的5-氨基吡唑-4-羧酰胺9与EMMN的反应提供了吡唑并[3,4- d ]嘧啶化合物10。
Heterocyclic Synthesis with Nitriles: Synthesis of Pyrazolopyrimidine and Pyrazolopyridine Derivatives
作者:Abdellatif M. Salaheldin、Ana M. F. Oliveira-Campos、Lígia M. Rodrigues
DOI:10.1080/00397910802517814
日期:2009.3.10
Abstract The reaction of N 1-substituted-5-amino-4-cyanopyrazoles with malononitrile and diethylmalonate occurs with formation of 6-substituted pyrazolo[3,4-d]pyrimidines, and pyrazolo[3,4-b]pyridines respectively. The structures of the products and conceivable mechanisms are discussed.
Disclosed herein are novel compounds comprising substituted pyrimidines, pyrazolopyrimtdines, and imidazolopyrimidines, the syntheses thereof, and compositions thereof, including pharmaceutical compositions, comprising the novel pyrimidines, pyrazolopyrimtdines, imidazolpyrimidines and related compounds. Such compounds function to inhibit entry of viruses of the Flaviviridae family, including Hepatitis C virus (HCV), into cells that are susceptible to virus infection. These compounds are useful for the treatment, therapy and/or prophylaxis of viral diseases and infection, including HCV infection.