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Lignanoids and Diterpenoids from Callicarpa furfuraceae

✍ Scribed by Yong Shao; Li-Hong Hu; Keng-Yeow Sim; Swee-Hock Goh

Publisher
John Wiley and Sons
Year
2006
Tongue
German
Weight
103 KB
Volume
89
Category
Article
ISSN
0018-019X

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✦ Synopsis

The three new lignanoids 1 -3 and the five new phyllocladane diterpenoids 7 -11 were isolated from the leaves of Callicarpa furfuraceae, together with two known lignanoids, lariciresinol (4) and (+)-sesamin (5), and five known diterpenoids, 17-norphyllocladane-3,16-dion (6), calliterpenone (12), calliterpenone 17-acetate ( 13), (3b,16a)-phyllocladane-3,16,17-triol ( 14), and (3b,16a)-phyllocladane-3,16,17-triol 17-acetate (15). Their structures were established by spectral-data interpretation.

Compound 2 was also obtained as white amorphous powder. The HR-EI-MS (m/z 386.1006) established its molecular formula as C 20 H 18 O 8 , containing one O-atom more than 1. Only ten signals were observed in its 13 C-NMR spectrum (Table 1) indicating that 2 has a symmetric structure. Comparison of the NMR data with those of compound 1 established the structure of 2 as sesamin-2,2'-diol.

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