Abstract

The hydrogenolysis of Photinia glabrescens proanthocyanidin polymer was investigated. Among the low MW products identified were phloroglucinol, catechin, epicatechin, 1 - (3, 4 - dihydroxyphenyl) - 3 - (2, 4, 6 -trihydroxyphenyl) propan - 2 - ol and the procyanidin dimers B1 and B2. Initial reaction products may be related to the known structure of the polymer. The yield of the ethyl acetate-soluble fraction reached a maximum after about 3 hr of hydrogenation and the major oligomeric fractions had significantly lower MWs than the parent polymer.

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