发现环状1,3-二酮,二甲基甲酰胺二甲基乙缩醛(DMFDMA)和2-(1 H-苯并[ d ]咪唑-2-基)乙腈的一锅反应是高度选择性的过程,可导致4-氧代-1 ,2,3,4-四氢苯并[4,5]咪唑[1,2 - a ]喹啉-6-基氰化物。在室温下或在微波加热下使用水作为溶剂的优化反应条件可实现高收率的目标产物,无需进一步纯化。
Rapid microwave-assisted solution phase synthesis of substituted 2-pyridone libraries
作者:Nikolay Yu. Gorobets、Behrooz H. Yousefi、Ferdinand Belaj、C.Oliver Kappe
DOI:10.1016/j.tet.2004.05.100
日期:2004.9
2-Pyridone and 2-quinolone analogues are well-known biologically active heterocyclic scaffolds. Libraries of 3,5,6-substituted 2-pyridone derivatives are generated by rapid microwave assisted solution phase methods using a one-pot, two-step protocol. The three-component condensation of CH-acidic carbonyl compounds, NN-dimethylformamide dimethylacetal and methylene active nitriles, leads to 2-pyridones and fused analogues in moderate to good overall yields and high purities. The proposed mechanism of this novel multicomponent reaction, structure elucidation of products and intermediates are discussed. (C) 2004 Elsevier Ltd. All rights reserved.