Synthetic Studies on Naturally Occurring Coumarins. II. Synthesis of 6,7-Dimethoxy- and 7,8-Dimethoxy-5-((E)-3-oxo-1-butenyl)coumarins.
作者:Hisashi ISHII、Tsutomu ISHIKAWA、Hisaya WADA、Hidetoshi MIYAZAKI、Yasuko KANEKO、Takashi HARAYAMA
DOI:10.1248/cpb.40.2614
日期:——
In connection with studies on the structure elucidation of the so-called Reisch's coumarin isolated from Toddalia asiatica, syntheses of two coumarins (4 and 5) were accomplished via the routes shown in Charts 2 and 3, respectively. Melting points and NMR data of the synthesized coumarins (4 and 5) and of related coumarins (5-methoxysuberenon, toddalenone, and Reisch's coumarin) are given in Table I, suggesting that so-called Reisch's coumarin might be 4.
关于从亚洲假黄檗(Toddalia asiatica)中分离出的所谓Reisch香豆素的结构鉴定研究,通过图表2和图表3所示的路线分别完成了两种香豆素(4和5)的合成。表I给出了合成的香豆素(4和5)以及相关香豆素(5-甲氧基苏贝瑞酮、托达来酮和Reisch香豆素)的熔点和核磁共振数据,这表明所谓的Reisch香豆素可能是化合物4。