Process for the preparation of N-(ortho-alkylphenyl)-imides

Details Process for the preparation of N-(ortho-alkylphenyl)-imides Process for the preparation of N-(ortho-alkylphenyl)-imides

1996-02-05

1997-11-04

Springer, David B.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548544, 548545, 548546, 548548, C07D207452, C07D207456, C07D20740

Patent

active

056841639

ABSTRACT:
A process for the preparation of a N-)ortho-alkylphenyl)-imide of the formula ##STR1## in which R.sup.1 to R.sup.9 is defined in the specification which comprises reacting a cyclic anhydride of the formula ##STR2## wherein R.sup.6 to R.sup.9 are difined in the specification with an amine of the formula ##STR3## optionally in the presence of an acid catalyst and optionally in the presence of a solvent which is immiscible or only slightly miscible with water but can form an azeotrope with water, at a temperature between 100.degree. to 200.degree. C. under conditions so that the water formed during the reaction is removed from the reaction mixture without the addition of a polymerization inhibitor or a dipolar solvent. The final products are used as intermediates to prepare heat-stable plastics as well as intermediates to prepare pharmaceutical and agricultural chemicals.

REFERENCES:
patent: 3890270 (1975-06-01), Minieri
patent: 4904803 (1990-02-01), Fujita et al.
patent: 5136052 (1992-08-01), Van Gysel et al.
Patent Abstracts of Japan, vol. 17, No. 361, abstract of JP 05-051362, (1983).
Chemical Abstracts, vol. 75, abstract No. 118127y, p. 203, abstract of DE 2,100,800, (1971).

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