Chemical studies on Sophora tomentosa: the isolation of a new class of isoflavonoid.
- 1 January 1990
- journal article
- research article
- Published by Pharmaceutical Society of Japan in CHEMICAL & PHARMACEUTICAL BULLETIN
- Vol. 38 (10) , 2756-2759
- https://doi.org/10.1248/cpb.38.2756
Abstract
Two new pterocarpans, sophoracarpans A and B, were isolated from Sophora tomentosa L. (Leguminosae) in addition to three known isoflavonoids, wighteone (erythrinin B), sophoraisoflavanone A and l-maackiain. The structures of sophoracarpans A and B were elucidated as 6.beta.,9-dimethoxy-3-hydroxypterocarpan and 3-hydroxy-6.beta.-methoxy-8,9-methylenedioxypterocarpan, respectively, on the spectroscopic basis. The configuration at C-6, C-6a, and C-11a of both compounds were determined by a series of nuclear magnetic resonance irradiation experiments. The isoflavone wighteone, known as an antifungal phytoalexin in several genera of leguminous plants, was also found to occur in the genus Sophora.Keywords
This publication has 1 reference indexed in Scilit:
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