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Yoshito Kishi (1937-2023)
Yoshito Kishi (1937-2023)
Professor. Yoshito Kishi,
a member of the Honorary Editorial Associates of HETEROCYCLES,
has passed away on January 9, 2023 at the age of 85.
I deeply express my regret over his death.
Kunio Ogasawara
Editor
January 13, 2023
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Communication | Regular issue | Vol 19, No. 9, 1982, pp.1585-1586
Published online, 1st January, 1970■ Stereochemistry of Silychristin, Mild Dehydrogenation of Flavononols
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
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