Syntheses of 8-aminoimidazo[4′,5′:5,6]pyrido[2,3-<i>d</i>]pyrimiciines: Linear tricyclic analogs of adenine
作者:Philip A. Harris、William Pendergast
DOI:10.1002/jhet.5570330218
日期:1996.3
The syntheses of 8-aminoimidazo[4′,5′:5,6]pyrido[2,3-d]pyrimidines (7), stretched-out versions of the naturally occuring nucleoside base adenine, are reported. Their preparation involves conversion of purine into 5-arninoimidazo[4,5-b]pyrimidine-6-carbonitrile (1) by reaction with malononitrile, followed by construction of the pyrimidine ring in two steps via the ethoxymethylene derivative 3. 8-Azapurine
据报道,天然存在的核苷碱基腺嘌呤的伸展型8-氨基咪唑并[4',5':5,6]吡啶[2,3- d ]嘧啶(7)的合成。它们的制备涉及嘌呤转化为5- arninoimidazo [4,5- b ]嘧啶-6-甲腈(1)通过与丙二腈反应,接着进行施工在两个步骤中的嘧啶环的通过的乙氧基亚甲基衍生物3。可以以类似方式将8-氮杂嘌呤转化为8-氨基-1,2,3-三唑并[4',5':5,6]吡啶并[2,3- d ]嘧啶8。