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Synthesis and metallation of 2-(pyridyl)benzoic acids and ethyl 2-(pyridyl)benzoates: a new route to azafluorenones

✍ Scribed by Anne-Sophie Rebstock; Florence Mongin; François Trécourt; Guy Quéguiner

Book ID: 104205425
Publisher: Elsevier Science
Year: 2003
Tongue: French
Weight: 155 KB
Volume: 59
Category: Article
ISSN: 0040-4020
DOI: 10.1016/s0040-4020(03)00761-0

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✦ Synopsis

The ring deprotonation of 2-(2-and 4-pyridyl)benzoic acids using lithium dialkylamides in THF at rt, and the in situ cyclization afforded 4-and 2-azafluorenones, respectively. 1-Azafluorenone was obtained from ethyl 2-(3-pyridyl)benzoate using a similar protocol.

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