A mild and efficient method for the synthesis of 3-methyl-1,4- diphenyl-7,8-dihydro-1H-furo[3,4-e]pyrazolo[3,4-b]pyridin-5(4H)-one derivatives via one-pot, four-component reaction of aromatic aldehydes, tetronic acid, 3-aminobut-2-enenitrile, and phenylhydrazine is described using Alum as catalyst. The features of this procedure are mild reaction conditions, excellent yields, short reaction time, and operational simplicity.
描述了一种温和且高效的方法,利用铝土矿作为催化剂,通过四组分的一个锅中反应合成3-甲基-1,4
-二苯基-7,8-二氢-1H-
呋喃[3,4-e]
吡唑[3,4-b]
吡啶-5(4H)-酮衍
生物,反应底物包括芳香醛、
四氢呋喃酸、3-
氨基丁-2-烯腈和苯
肼。该过程的特点是反应条件温和、产率优秀、反应时间短以及操作简单。