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。