Synthesis of ethyl alpha-cyanocinnamates catalyzed by KF-Al2O3 under ultrasound irradiation.
Knoevenagel condensation of ethyl cyanoacetate with aromatic aldehyde catalyzed by KF-Al2O3 in ethanol results ethyl alpha-cyanocinnamates in 97-99% yield under ultrasound irradiation.
Wang
Shu-Xiang
SX
Department of Chemistry, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, China.
Li
Ji-Tai
JT
Yang
Wen-Zhi
WZ
Li
Tong-Shuang
TS