The gould-jacob type of reaction for the synthesis of novel pyrimidopyrrolopyrimidines: A comparison of classical heating<i>vs</i>solvent free microwave irradiation
作者:Nirmal D. Desai
DOI:10.1002/jhet.5570430530
日期:2006.9
The Gould-Jacob type of reaction for the synthesis of ethyl 4-oxo-8,10-substituted-4,8-dihydropyrimido[1,2-c]pyrrolo[3,2-e]pyrimidine-3-carboxylates 5 has been carried out conventionally by the condensation between 4-aminopyrrolo[2,3-d]pyrimidines 2 and diethyl ethoxymethylenemalonate 3 via acyclic intermediates diethyl N-[5,7-substituted-7H-pyrrolo[2,3-d]pyrimidin-4-yl]aminomethylenemalonates 4 and
对于4-氧代-8,10-二取代的-4,8-二氢嘧啶的合成古尔德-雅各布类型的反应中[1,2 Ç ]吡咯并[3,2- ë ]嘧啶-3-羧酸5已经通过缩合4-氨基吡咯并[2,3-之间常规进行d ]嘧啶2和二乙氧基亚甲基3 经由非环状中间体二乙ñ - [5,7-取代的-7- ħ吡咯并[2,3- d ]嘧啶-4- -基]氨基亚甲基丙二酸酯4,并将所得结果与无溶剂条件下的一步微波辐射进行比较,以合成5。