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Une Synthèse Aisée De Diméthyl-6",6" Pyrannoisoflavones Angulaires by C. Vilain; J. Jadot is a Chemistry article available to read on EtoBox.
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## Abstract 3‐hydroxyisovaleraldehyde dimethyl acetal(I) is condensed in the presence of pyridine with 2,4‐dihydroxy phenyl benzyl ketones (IIa, b, c, d) to give 2,2‐dimethyl‐6‐phenylacetyl‐5‐hydroxychromenes (IIIa, b, c, d); these intermediates are directly converted into the corresponding angular 6", 6"‐dimethylpyranoisoflavones (IVa, b, c, d) by condensation with ethylorthoformate in the presence of pyridine and piperidine. Compounds IV b and IV d are respectively identical with the natural products Calopogonium Isoflavone A and B wich we have described earlier.
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- Author
- C. Vilain; J. Jadot
- Publisher
- Wiley (John Wiley & Sons); John Wiley & Sons Ltd.; Wiley (ISSN 0037-9646)
- Published
- 2010
- Language
- EN
- Field
- Chemistry (Physical Sciences)