A Simple Approach to the Synthesis of Fluoren-9-Ones

A Simple Approach to the Synthesis of Fluoren-9-Ones

Cyclohexene-l-Carboxylic acid (I) undergoes reaction with various aromatic substrates (2a-i) in presence of Polyphosphoric acid (PPA) at 100[ddot]c to give cis-1,2,3,4,4a,9a - hexahydrofluoren-9-ones (3a-i) in good yield. Dehydrogenation of (3a-i) with selenium powder afforded corresponding fluoren-...

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Veröffentlicht in:Synthetic communications 1995-06, Vol.25 (11), p.1751-1760
Hauptverfasser: Ramana, M. M. V., Potnis, Prashant V.
Format: Artikel
Sprache:eng
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Zusammenfassung:Cyclohexene-l-Carboxylic acid (I) undergoes reaction with various aromatic substrates (2a-i) in presence of Polyphosphoric acid (PPA) at 100[ddot]c to give cis-1,2,3,4,4a,9a - hexahydrofluoren-9-ones (3a-i) in good yield. Dehydrogenation of (3a-i) with selenium powder afforded corresponding fluoren-9-ones (4a-i) in high yield.
ISSN:0039-7911
1532-2432
DOI:10.1080/00397919508015860