A protocol for the microwave-assisted Friedländer synthesis of quinoline derivatives under solvent-free conditions has been developed. According to this modified method, quinoline derivatives were synthesized by condensation of 2-aminobenzophenone with the corresponding carbonyl compounds in the presence of phosphomolybdic acid for 8 min in a 320 W microwave with yields ranging from 61% to 90%. The fluorescence properties of the synthesized compounds were studied, and all compounds showed good fluorescence properties. The substituted groups and the concentrations of quinolines and solvents had significant effects on the compounds’ fluorescence properties. This method provides a convenient way to obtain quinolines, and is beneficial to the application of these compounds.

中文翻译：

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微波辅助无溶剂合成喹啉衍生物及其荧光性质

已经开发了在无溶剂条件下微波辅助弗里德兰德合成喹啉衍生物的方案。根据这种改进的方法，在磷钼酸存在下，在320 W微波中，将2-氨基二苯甲酮与相应的羰基化合物缩合8分钟，合成喹啉衍生物，产率为61％至90％。研究了合成化合物的荧光性质，所有化合物均显示出良好的荧光性质。取代基以及喹啉和溶剂的浓度对化合物的荧光性质有重要影响。该方法提供了一种获得喹啉的简便方法，并且对这些化合物的应用是有益的。