Synthesis of highly substituted tetrahydroquinolines using ethyl cyanoacetate <i>via</i> aza-Michael–Michael addition
作者:Arunan Palanimuthu、Chinpiao Chen、Gene-Hsian Lee
DOI:10.1039/d0ra01264e
日期:——
three-component cascadereaction involving 2-alkenyl aniline, aldehydes, and ethyl cyanoacetate in the presence of DBU to synthesize highly substituted 1,2,3,4-tetrahydroquinolines is reported. The reaction proceeded through the Knoevenagel condensation of ethyl cyanoacetate with aldehydes followed by the aza-Michael–Michael addition with 2-alkenyl anilines to prepare the tetrahydroquinoline scaffolds.