Pyrimidines, Part<b>XXXI</b>. Synthesis, reactions and properties of 6-acyl-1,3-dimethylpyrrolo[2,3-<i>d</i>]pyrimidine-2,4-diones
作者:Zuhair S. Salih、Peter Stegmüller、Wolfgang Pfleiderer
DOI:10.1002/jhet.5570250536
日期:1988.9
Acylations of 1,3-dimethyl- (1) and 1,3,7-trimethylpyrrolo[2,3-d]pyrimidine-2,4-dione (2) with anhydrides in the presence of trifluoroacetic acid proceed well to give in good yields the corresponding 7-acyl derivatives 3–11. The 6-trichloroacetyl derivatives 5 and 6 are sensitive towards nucleophiles, which displace the trichloromethyl group easily by formation of the corresponding 6-carboxylic acid
在三氟乙酸的存在下,用酸酐对1,3-二甲基-(1)和1,3,7-三甲基吡咯并[2,3- d ]嘧啶-2,4-二酮(2)进行酰化反应,得到良好的收率。产生相应的7-酰基衍生物3-11。6-三氯乙酰基衍生物5和6对亲核试剂敏感,亲核试剂通过形成相应的6-羧酸衍生物12-23容易取代三氯甲基。新合成的化合物已通过元素分析,紫外和1 H nmr光谱以及p K a的测定进行了表征。