Synthetic Studies on Naturally Occurring Coumarins. I. A Convenient Synthesis of 5,8-Dimethoxy- and 7,8-Dimethoxycoumarins.
作者:Hisashi ISHII、Kazuhiro KENMOTSU、Werner DOPKE、Takashi HARAYAMA
DOI:10.1248/cpb.40.1770
日期:——
The coumarin isolated from Ariemisia carvifolia WALL was proved synthetically to be 7, 8-dimethoxycoumarin and not 5, 8-dimethoxycoumarin as previously proposed. 3, 4-Dimethoxy- and 3, 6-dimethoxysalicylaldehydes gave the corresponding coumarins in good yield by the method using phosphorane reagent in N, N-diethylaniline under reflux.
从Ariemisia carvifolia WALL中分离出的香豆素经过合成证明为7, 8-二甲氧香豆素,而非之前提出的5, 8-二甲氧香豆素。通过在回流条件下使用在N, N-二乙基苯胺中反应的磷烷试剂,3, 4-二甲氧基和3, 6-二甲氧基香草醛得到了相应的香豆素,产率良好。