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2005
Other natural products
U 0800
Synthesis of Modified Proanthocyanidins: Easy and General Introduction of
Hydroxy Group at C-6 of Catechin; Efficient Synthesis of Elephantorrhizol. —
25- 209 aTwo
procedures are presented for the regioselective introduction of a hydroxy group at
the C-6 position of catechin derivatives of type (I). Dimethyldioxirane or m-CPBA are
employed as oxidants. The obtained hydroxylated derivatives (II) can be used as starting compounds for consecutive reactions forming (IV) or (VII). — (BOYER, F.-D.;
ES-SAFI, N.-E.; BEAUHAIRE, J.; LE GUERNEVE, C.; DUCROT*, P.-H.; Bioorg.
Med. Chem. Lett. 15 (2005) 3, 563-566; Unite Phytopharm. Mediateurs Chim., INRA,
F-78026 Versailles, Fr.; Eng.) — M. Bohle
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