| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5275216 | Tetrahedron Letters | 2009 | 4 Pages |
Abstract
An unstable intermediate proepitheaflagallin B (2), a precursor of proepitheaflagallin (3), was isolated as an enzymatic oxidation product of (â)-epigallocatechin (1), and the structure of 2 was determined based on spectroscopic data. The structure and its decomposition revealed that the detailed production mechanism of proepitheaflagallin (3) via a bicyclo[3.2.1]octane-type intermediate was related to that of major black tea pigments, theaflavins.
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Physical Sciences and Engineering
Chemistry
Organic Chemistry
![Production mechanism of proepitheaflagallin, a precursor of benzotropolone-type black tea pigment, derived from epigallocatechin via a bicyclo[3.2.1]octane-type intermediate](/preview/png/5275216.png "First Page Preview: Production mechanism of proepitheaflagallin, a precursor of benzotropolone-type black tea pigment, derived from epigallocatechin via a bicyclo[3.2.1]octane-type intermediate")
Authors
Yosuke Matsuo, Takashi Tanaka, Isao Kouno,