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 cascade reaction 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.
据报道,在 DBU 存在下,涉及 2-烯基苯胺、醛和氰基乙酸乙酯的三组分级联反应合成了高度取代的 1,2,3,4-四氢喹啉。该反应通过氰基乙酸乙酯与醛的 Knoevenagel 缩合进行,然后与 2-烯基苯胺进行氮杂-迈克尔-迈克尔加成,制备四氢喹啉支架。