The reaction of o-hydroxybenzaldehydes with methyl 3-aminocrotonate in acetic acid at room temperature yields methyl 2,4-dimethyl-5-oxo-5H-[1]benzopyrano[3, 4-c]pyridine-1-carboxylates, in 22-42% yield.
o-羟基
苯甲醛与甲基3-
氨基克罗顿酸酯在室温下于
醋酸中反应,产物为甲基2,4-二甲基-5-氧代-5H-[1]苯并
吡喃[3, 4-c]
吡啶-1-
羧酸酯,产率为22-42%。