作者:Madhukar N. Jachak、Chanda D. Tantak、Raghunath B. Toche、Naresh S. Badgujar
DOI:10.1007/s00706-004-0192-8
日期:2004.12
4-aryl-5-cyano-3-substituted pyrimidines (in acid) or to 4-amino-5-benzoylpyrimidines (in base) in 60–70% yields. The amine pyrimidine derivatives were further converted to substituted uracils by hydrolysis with isopentyl nitrite in DMF . Alkylation of uracils furnished 1,3-dimethyluracil derivatives with DMS in alkali. All new compounds were characterised by spectral and analytical methods.
在单锅反应中,在尿素存在的情况下,通过 Ar COCH 2 CN和HC(O Et )3的 Knoevenagel 缩合反应, 合成了一系列脲基丙烯腈 。这些脲基丙烯腈被环化成4-芳基-5-氰基-3-取代的嘧啶(在酸中)或4-氨基-5-苯甲酰基嘧啶(在碱中),产率为60-70%。胺嘧啶衍生物通过在 DMF中 与亚硝酸异戊酯水解进一步转化为取代的尿嘧啶 。尿嘧啶在碱性条件下用 DMS 烷基化提供1,3-二甲基尿嘧啶衍生物 。所有新化合物都通过光谱和分析方法进行了表征。