Tetrahedron Letters p. 2643 - 2646 (1990)
Update date:2022-07-29
Topics:
Van Dyk, Martha S.
Steynberg, Jan P.
Steynberg, Petrus J.
Ferreira, Daneel
The flavan-3-ols (+)-catechin and (-)-epicatechin were selectively transformed to their 3′,4′-di-O-methyl- and 5,7-di-Omethyl-ethers respectively via benzyl carbonates. Such a regioselectivity is facilitated by marked differences in the pKa values of the
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