Catechin Dimer

Catechin 이합체

A 6', 8a-bonded catechin dimer was synthesized by action of phenoloxidase on 2mol (+)-catechins. The same dimer and other two dimers which are also 6', 8a-bonded were isolated from the fresh cortex of Quercus robur. The 4, 8a-bonded and the etherified 4, 8a-bonded dimers were isolated from it. It was discussed about the meaning of the enzymatically produced 6', 8a-bonded dimers in plant cell. The isolated dimers are as following: 1. 6', 8a-bonded dimers: (+)-catechin-(+)-catechin-6', 8a-dimer(IX), (+)-catechin-(+)-gallocatechin-6', 8a-dimar (XIII), (+)-gallocatechin-(+)-catechin-6', 8a-dimer(XIV). 2. 4, 8a-bonded dimers: (+)-catechin-(+)-catechin-4, 8a-dimer(X), (-)-epicatechin-(+)-catechin-4, 8a-dimer (XI), (+) -galloatechin-(+)-catechin-4, 8a-dimer (XII). 3. 4,8a-bonded dimers with ether linkage: etherified(+)-catechin-(+)-catechin-4, 8a-dimer (XV), etherifid (+)-catechin-(+)-gallocatechin-4, 8a-dimer (XVI), etherified (+)-gallocatechin-(+)-catechin-4, 6a-dimer (XVII).