A convenient synthesis of a simple coumarin.
作者:Hisashi ISHII、Yasuko KANEKO、Hidetoshi MIYAZAKI、Takashi HARAYAMA
DOI:10.1248/cpb.39.3100
日期:——
Reaction of salicylaldehydes (1) with carbethoxymethylenephosphorane in diethylaniline under reflux gave coumarins (3) in excellent vields. Methoxy substituent at C4 on salicylaldehyde (1) facilitated the formation of coumarin from trans-cinnamate (2), which is first prepared by reaction of 1 with Wittng reagent.
水杨醛 (1) 与二乙氧基亚甲基正膦在二
乙基苯胺中回流反应,得到优异产率的
香豆素 (3)。
水杨醛 (1) 上 C4 上的甲氧基取代基促进了反式
肉桂酸酯 (2) 形成
香豆素,该反式
肉桂酸酯首先通过 1 与 Wittng 试剂反应制备。