An efficient, catalyst-free, and one-pot three-component procedure for the synthesis of novel and nitrogen rich dihydropyrido[2,3-d]pyrimidines and dihydro-1H-pyrazolo[3,4-b]pyridines bearing a quinoline pharmacophore fragment is provided. Reactions proceeded in DMF under microwave irradiation of three-component mixtures of formyl-quinoline derivatives, primary heterocyclic amines and cyclic 1,3-diketones. Interestingly, when conventional heating at reflux was used for the starting 5-amino-1-phenylpyrazole, the corresponding aromatized pyrazolopyridines were obtained as the main products. Single crystal X-ray analysis confirmed unequivocally the structure of both the dihydro- and aromatized products.

中文翻译：

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微波辅助合成取代基喹啉的二氢吡啶并嘧啶和二氢吡唑并吡啶杂合物

一种高效，无催化剂，一锅三组分的合成新型和富氮二氢吡啶并[2,3- d ]嘧啶和带有喹啉的二氢-1H-吡唑并[3,4- b ]吡啶的方法提供了药效团片段。在微波辐射下，甲酰喹啉衍生物，伯杂环胺和环状1,3-二酮的三组分混合物在DMF中进行反应。有趣的是，当将常规的回流加热用于起始的5-氨基-1-苯基吡唑时，获得了相应的芳香化吡唑并吡啶作为主要产物。单晶X射线分析清楚地证实了二氢和芳香化产品的结构。