Prodelphinidin polymers: definition of structural units
Abstract
The two basic structural units of condensed prodelphinidin polymers have been defined by generation of the C-4 carbocations, corresponding in stereochemistry to (+)-gallocatechin (1) and (–)-epigallocatechin (2), and trapping them as their phloroglucinol adducts (4) and (7). Two naturally occurring dimeric prodelphinidins with stereochemistry based on that of gallocatechin have also been isolated.