W. Ohmura, S. Ohara, K. Hashida, M. Aoyama, S. Doi
Hydrothermolysis of Flavonoids in
Relation to Steaming of Japanese Larch Wood
Summary
Four flavonoid compounds, ((+)-taxifolin, (+)-aromadendrin, quercetin and (?)-naringenin), from
Japanese larch (Larix leptolepis) wood were heated at 170 ?C for 60 min at pH=3.46 (hydrothermolysis
treatment). Alphitonin, four taxifolin steric isomers and quercetin were recovered from
the treatment of (+)-taxifolin, and maesopsin, four aromadendrin steric isomers and kaempferol
from (+)-aromadendrin. The reaction products from (?)-naringenin were found to be a mixture
with (+)-naringenin. Quercetin was not changed by the treatment. Possible pathways for the formation
of these products are discussed.
Holzforschung, Walter de Gruyter
Print ISSN: 0018-3830
Volume: 56, 08/2002
Pages: 493 - 497
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