作者:Péter Mátyus、Géza Szilágyi、Endre Kasztreiner、György Rabloczky、Pál Sohár
DOI:10.1002/jhet.5570250552
日期:1988.9
On reacting the 3-aminopyridazines 1a,d,e with dimethyl acetylenedicarboxylate (DMAD), the pyrimido[1,2-b]pyridazin-2-(2H)-ones 2e-g, whereas starting from 1f, the 4(4H)-ones 5a and 3b,d were prepared. In the 2(2H)-one series, the reactions of 2b with various amino compounds resulted in various types of products. The reaction of N-methylaminopyridazines 1g,h with DMAD led to the endo-N-substituted
3-氨基哒嗪1a,d,e与乙炔二甲酸二甲酯(DMAD)反应后,嘧啶并[1,2 - b ]哒嗪-2-(2 H)-ones 2e-g,而从1f开始,4(4制备了H 5 -one 5a和3b,d。在2(2 H)-one系列中,2b与各种氨基化合物的反应生成各种类型的产物。N-甲基氨基哒嗪1g,h与DMAD的反应生成了N-取代的内衍生物8a,b,而1h用乙氧基亚甲基丙二酸二乙酯(DEM)制得外-N-取代的化合物1k。化合物的组成已通过光谱和化学证据证明。