Process for preparation of N-substituted maleimides

Details Process for preparation of N-substituted maleimides Process for preparation of N-substituted maleimides

1990-04-18

1992-02-11

Springer, David B.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D207444

Patent

active

050877054

ABSTRACT:
N-substituted maleimide represented by formula (2): ##STR1## is produced from N-substituted maleamic acid monoester represented by formula (1): ##STR2## in the presence of an acid catalyst by elmination of an alcohol from the monoester. The above N-substituted maleamic acid monoester represented by formula (1) is produced by esterification of N-substituted maleamic acid represented by formula (3): ##STR3## with an alcohol R.sup.2 -OH in the represence of an acid catalyst.

REFERENCES:
patent: 2444536 (1948-07-01), Searle
patent: 4171302 (1979-10-01), Abblard et al.
Chemische Berichte, Helferich et al., vol. 100, 1967, pp. 421-424.
Tsutomu Oishi et al., "Syntheses and Thermostabilities of N-Substituted Maleimide Copolymers. III. N-Isopropylmaleimide, N-sec-Butylmaleimide and N-tert-Butylmaleimide".
Technology Reports of the Yamaguchi University, vol. 4, No. 2, Dec. 1988, 152-159.

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