A ONE-STEP SYNTHESIS OF PURINE DERIVATIVES BY THE REACTION OF PHENYLAZOMALONAMIDAMIDINE WITH ARYL ALDEHYDES
作者:Fumio Yoneda、Ryosuke Koga、Masatsugu Higuchi
DOI:10.1246/cl.1982.365
日期:1982.3.5
Treatment of phenylazomalonamidamidine (I) with aryl aldehydes yielded the corresponding 2,8-diarylhypoxanthines (II) in a single step. The reaction under milder conditions formed the intermediary monoarylidene derivatives (III) of I, from which the corresponding 6-amino-2-aryl-5-phenylazopyrimidine-4(3H)-ones (IV) were obtained by the oxidative cyclization with diethyl azodicarboxylate. Treatment
用芳基醛处理苯基偶氮丙二脒脒 (I),一步生成相应的 2,8-二芳基次黄嘌呤 (II)。在较温和的条件下反应形成 I 的中间单亚芳基衍生物 (III),从中通过与偶氮二羧酸二乙酯氧化环化得到相应的 6-氨基-2-芳基-5-苯基偶氮嘧啶-4(3H)-酮 (IV) . 用第二芳基醛处理 IV 得到不对称的 2,8-二芳基次黄嘌呤。