Tetrahedron Letters p. 2059 - 2062 (1990)
Update date:2022-08-05
Topics:
Steynberg, Petrus J.
Burger, Johann F.W.
Bezuidenhoudt, Barend C.B.
Steynberg, Jan P.
Dyk, Martha S. Van
Ferreira, Daneel
The functionalized 2,3-trans-8,9-trans-9,10-cis-3,4,9,10-tetrahydro-2H,8H-pyrano<2,3-h>chromenes 4 and 6 represent the first naturally occurring condensed tannins with (2S,3R)-2,3-trans-(-)-catechin 'terminal' moieties; the structure of 4 is unequivocally confirmed by synthesis.
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