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Synthesis of 4-substituted cycloheptatrienones by oxidative-cheletropic elimination of nitrosobenzene from 6-substituted 8-phenyl-8-azabicyclo[3.2.1]octa-3,6-dien-1-ones

โœ Scribed by Roberts, Victoria A.; Garst, Michael E.


Book ID
127037305
Publisher
American Chemical Society
Year
1985
Tongue
English
Weight
312 KB
Volume
50
Category
Article
ISSN
0022-3263

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## Abstract Condensation of 2โ€hydroxyacetophenone with benzaldehyde in the presence of 70% perchloric acid in ethyl orthoformate gave the corresponding 4โ€ethoxyflavylium perchlorate, which was treated with aqueous ammonia or methylamine solution to afford 1,6,7,8โ€substituted 2โ€(3โ€ฒ,4โ€ฒโ€substitutedโ€ph