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Communication | Regular issue | Vol 19, No. 9, 1982, pp.1585-1586
Published online, 1st January, 1970
DOI: 10.3987/R-1982-09-1585
Stereochemistry of Silychristin, Mild Dehydrogenation of Flavononols

Antonio Zanarotti

*CNR, Centro Studio Sostanze Organiche Naturali, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy

Abstract

3-Hydroxyflavanones can be quantitatively dehydrogenated by air in pyridine to 2,3-dehydro derivatives. The reaction has been performed on silychristin (1) in order to remove the chirality at the flavanonol ring and to allow the assignment of the stereochemistry of the dihydrobenzofuran ring as 2’R,3’S