Process for making fluorenones

Details Process for making fluorenones Process for making fluorenones

1995-02-07

1996-08-13

Reamer, James H.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

C07C 4536

Patent

active

055457606

ABSTRACT:
A process for the oxidation of a fluorene compound to a corresponding fluorenone compound comprises treating the fluorene compound with an oxidizing gas in the presence of a solid alkali metal or alkaline earth metal oxide or hydroxide or a concentrated aqueous solution thereof in a reaction mixture in a non-aqueous heterocylic nitrogenous solvent, wherein the reaction mixture is free of a phase transfer agent, for a time sufficient and at a temperature sufficient to convert the fluorene compound to the fluorenone compound.

REFERENCES:
patent: 3875237 (1975-04-01), Niznik
patent: 4009151 (1977-02-01), Pearson et al.
patent: 4218400 (1980-08-01), Finger
patent: 4297514 (1981-10-01), Ma
Kinoshita et al., "Liquid Phase Air Oxidation of Fluorene, Part 1. Effects of Alkali and Pyridine," Nippon Kagaku Zasshi, vol. 80 (1959), pp. 206-208 (translation attached).
Sprinzak, "Reactions of Active Methylene Compounds in Pyridine Solution. I. The Ionic Autoxidation of Fluorene and its Derivatives," J. Am. Chem. Soc., vol. 80 (1958), pp. 5449-5455.

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