Process for the preparation of fluorene-9-carboxylic acid

Details Process for the preparation of fluorene-9-carboxylic acid Process for the preparation of fluorene-9-carboxylic acid

1983-11-16

1986-01-14

Trousof, Natalie

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

Organic compounds

Carboxylic acids and salts thereof

560 8, 562423, C07C 5109, C07C 5115, C07C 69753

Patent

active

045647003

ABSTRACT:
An improved process for the preparation of fluorene-9-carboxylic acid comprising reacting fluorene and a dialkyl carbonate with alkyls of 1 to 5 carbon atoms in the presence of a member of the group consisting of alkali metal hydrides or potassium alcoholate of an aliphatic alcohol of 1 to 5 carbon atoms, neutralizing the mixture and saponifying the resulting fluorene-9-carboxylic acid ester to obtain fluorene-9-carboxylic acid in good yields.

REFERENCES:
patent: 2367632 (1945-01-01), Wallingford et al.
patent: 2376837 (1945-05-01), Wallingford et al.
patent: 3264308 (1966-08-01), van der Stelt
patent: 3369044 (1968-02-01), Leonard et al.
patent: 3598564 (1971-08-01), Jacobi et al.
patent: 3636080 (1972-01-01), Brossi et al.
patent: 3692826 (1972-09-01), Patmore et al.
patent: 3718690 (1973-02-01), Bushick et al.
The Chemistry of Carboxylic Acids and Esters, 1969, pp. 165-170, 173, Interscience Publishers, New York, Patai, ed.

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