One-pot synthesis of pyrido[2,3-<i>d</i>]pyrimidines via efficient three-component reaction in aqueous media
作者:Daqing Shi、Shunjun Ji、Lihui Niu、Jingwen Shi、Xiangshan Wang
DOI:10.1002/jhet.5570440517
日期:2007.9
A short and facile synthesis of pyrido[2,3-d]pyrimidinederivatives was accomplished in good yields via the three-component reaction of aldehydes, alkyl nitriles and aminopyrimidines in water in the presence of triethylbenzylammonium chloride (TEBAC). The structures of these compounds were characterized by elemental analysis, IR and 1H NMR spectra and further confirmed by single crystal X-ray diffraction
在三乙基苄基氯化铵(TEBAC)存在下,通过醛,烷基腈和氨基嘧啶的三组分反应,可以快速,简便地合成吡啶并[2,3- d ]嘧啶衍生物。这些化合物的结构通过元素分析,IR和1 H NMR光谱进行表征,并通过单晶X射线衍射分析进一步证实。
An efficient one pot three component synthesis of fused pyridines via electrochemical approach
作者:Abhishek Upadhyay、Laxmi Kant Sharma、Vinay K. Singh、Rana Krishna Pal Singh
DOI:10.1016/j.tetlet.2016.10.111
日期:2016.12
A convenient and economical method is developed for the synthesis of pyrido[2,3-d]pyrimidine derivatives by electrochemically induced condensation of various aromatic aldehydes, dimedone or malononitrile and 6-amino uracil. The reaction is carried out in an undivided cell, at a constant current in the presence of NaBr as supporting electrolyte and ethanol as solvent.
通过化学诱导各种芳族醛,二甲酮或丙二腈和6-氨基尿嘧啶的缩合反应,开发了一种方便经济的合成吡啶并[2,3- d ]嘧啶衍生物的方法。该反应在不分隔的电池中,在NaBr作为支持电解质和乙醇作为溶剂的存在下,以恒定电流进行。
Synthesis of fused pyridines in the presence of thiamine hydrochloride as an efficient and reusable catalyst in aqueous conditions
作者:I. R. Siddiqui、Pragati Rai、Rahila、Anushree Srivastava、Arjita Srivastava、Anjali Srivastava
DOI:10.1039/c3nj00711a
日期:——
Efficient and straightforward synthesis of fused pyridine derivatives was achieved from electron-rich amino heterocycles and Knoevenagel products derived from aldehyde and malononitrile under aqueous media at 90 °C in the presence of thiamine hydrochloride as a reusable, green catalyst. The strategy in this protocol involves addition on an activated olefinic bond formed in situ by Knoevenagel condensation