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Synthesis of 2-Substituted-6,7-dimethoxy- and 6,7,8-Trimethoxy-3-hydroxyquinolin-4(1H)-ones

✍ Scribed by Hradil, Pavel; Vaněček, Jan; Hlaváč, Jan; Ševčík, Juraj

Book ID: 125461510
Publisher: UOCHB
Year: 1999
Tongue: English
Weight: 115 KB
Volume: 64
Category: Article
ISSN: 0010-0765
DOI: 10.1135/cccc19990257

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## Abstract Die Bromwasserstoff‐Eliminierung mit Kalium‐tert.‐butanolat aus 6‐Brom‐2.3.4‐trimethoxy‐8.9‐dihydro‐7__H__‐benzocyclohepten (**3b**) führt zum Cycloallen **5**, das mit 1.3‐Diphenyl‐benzo‐[__c__]furan (**6**) das Addukt **8** ergibt. In Abwesenheit von Abfängern dimerisiert **5**; die K