Synthesis of C-C-bridged bis-isoflavones |
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| Authors: | al-Maharik N I Kaltia S A Mutikainen I Wähälä K |
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| Institution: | Department of Chemistry, University of Helsinki, Finland. |
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| Abstract: | Unique C-C-bridged bis-isoflavones 5, 8, and 9 were obtained by reaction of 2-bromomethyl-7,4'-dimethoxyisoflavone 4 with ethyl cyanoacetate anion or tetraethylammonium cyanide or by Pd-catalyzed ethoxycarbonylation, respectively. The phenolic carboxylic acid 7 is available from 5 in two steps. |
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