The isolation of a bicyclo[3.2.1] intermediate during formation of benzotropolones, a common nucleus found in black tea pigments: Theaflavins

Synlett

Volumn , Issue 17, 2005, Pages 2661-2663

  Yanase, Emiko ^a   Sawaki, Kaori ^a   Nakatsuka, Shin Ichi ^a  

^a GIFU UNIVERSITY   (Japan)

Author keywords

Benzotropolones; Bicyclic compounds; Oxidations; Quinones; Theaflavins

Indexed keywords

4 METHYL 4 QUINONE; 5 METHYLPYROGALLOL; BENZOTROPOLONE DERIVATIVE; BICYCLO COMPOUND; DICHLOROMETHANE; FLAVONOID; PHENOL DERIVATIVE; QUINONE DERIVATIVE; THEAFLAVIN DERIVATIVE; TROPOLONE DERIVATIVE; UNCLASSIFIED DRUG; WATER;

ARTICLE; CHEMICAL REACTION; CHEMICAL STRUCTURE; DECARBOXYLATION; DRUG ISOLATION; OXIDATION; RING OPENING; SYNTHESIS;

EID: 27444447426     PISSN: 09365214     EISSN: None     Source Type: Journal    
DOI: 10.1055/s-2005-917094     Document Type: Article

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26. We consider that this condensation reaction is not a Diels-Alder-type coupling but ionic coupling of o-quinone with phenol. The details will be reported in the future.