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The solvent-free synthesis of 1,4-dihydropyridines under ultrasound irradiation without catalyst
Shu-Xiang Wang1, Zhi-Yan Li, Jin-Chao Zhang
1Laboratory of Chemical Biology, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, PR China. wsx@mail.hbu.edu.cn
Ultrasonics Sonochemistry
|April 9, 2008
Abstract:
The condensation of aldehydes, ethyl acetoacetate and ammonium acetate result 1,4-dihydropyridines in 82-99% yields under ultrasound irradiation without solvent and catalyst at room temperature. Compared with conventional methods, the main advantages of the present procedure are milder conditions, shorter reaction time and higher yields.
