New prenylated isoflavones and a prenylated dihydroflavonol from Millettia pachycarpa |
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| Authors: | Ashok K Singhal Ram P Sharma Gopalakrishna Thyagarajan Werner Herz Serengolam V Govindan |
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| Institution: | 1. Department of Organic Chemistry, Regional Research Laboratory, Jorhat—785006, Assam, India;2. Department of Chemistry, The Florida State University, Tallahassee, FL 32306, U.S.A. |
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| Abstract: | Extraction of Millettia pachycarpa Benth. gave 5,7,4′-trihydroxy-6,8-diprenylisoflavone (1a), 5,7,4′-trihydroxy-6,3′-diprenylisoflavone (2a), 5,7,3′,4′-tetrahydroxy-6,8-diprenylisoflavone (3a) and (2R, 3R)-5,4′-dihydroxy-8-prenyl-6″,6″-dimethylpyrano2″,3″: 7,6]-dihydroflavonol (4a) whose structures were established by chemical transformations and spectroscopic means. Pectolinarigenin and salvigenin were isolated from Buddleia macrostachya Benth. |
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| Keywords: | Leguminosae Lotodoideae prenylated isoflavones prenylated dihydroflavonols Buddleiaceae pectolinarigenin salvigenin |
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