Process for the manufacture of N-phenylmaleimide

Details Process for the manufacture of N-phenylmaleimide Process for the manufacture of N-phenylmaleimide

1991-05-29

1992-08-04

Springer, David B.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548548, 203 14, 203 58, C07D207448, C07D20116

Patent

active

051360527

ABSTRACT:
A process for the manufacture of N-phenylmaleimide which comprises reacting maleic anhydride with aniline in a single step at elevated temperature in the presence of a water-immiscible organic solvent capable of forming an azeotrope with water and of p-toluenesulfonic acis as catalyst. According to the invention, N-phenylmaleimide recovery comprises the successive steps of:

REFERENCES:
patent: 4111879 (1978-09-01), Mori et al.
Patent Abstracts of Japan, vol. 9, No. 260 (C-309) (1983), Abstract of JP 60-112758.
Patent Abstracts of Japan, vol. 9, No. 260 (C-309) (1983) Abstract of JP 60-112759.
Patent Abstracts of Japan, vol. 11, No. 262 (C-442) (1987) Abstract of JP 62-63561.

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