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Structure of a new Daphniphyllum alkaloid, Daphnilactone B

✍ Scribed by Kyoku Sasaki; Yoshimasa Hirata

Publisher
Elsevier Science
Year
1972
Tongue
French
Weight
120 KB
Volume
13
Category
Article
ISSN
0040-4039

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✦ Synopsis

Daphnilactone B1 was a major component of the alkaloids, isolated from the fruits of Daphniphyllum macropodum Miquel. This alkaloid has never been isolated from other parts of this plant. The spectral data' of daphnilactone B showed the presence of a secondary methyl group ( 6 l.OOppm, 31-1, d, J=bHz ), a vinyl proton ( 6 5.67, 1H ), and a lactone ring ( vmax 1726cm-1 ). The difficulty in clarifying this structure with chemical methods and the interest in the biogenesis of the daphniphyllum alkaloids stimulated us to the present X-ray crystallographical study. We have established the crystal structure of this compound

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