Stereoselective synthesis of flavonoids.
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Hendrik van Rensburg; Pieter S. van Heerden; Barend C.B. Bezuidenhoudt; Daneel F
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Article
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1997
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Elsevier Science
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French
β 561 KB
Epoxidation of a series of poly-oxygenated chalcones with H202 in the presence of poly-ctaminoacids yielded chiral aromatic oxygenated oxiranes in moderate to high optical yields. Lewis acid-catalysed phenylmethanethiol ringopening of the epoxide functionality and subsequent formation of the pyranon