Method for production of maleimides

Details Method for production of maleimides Method for production of maleimides

1989-02-14

1990-12-25

Springer, David B.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548549, C07D207448

Patent

active

049804839

ABSTRACT:
A method for the production of a maleimide, which comprises effecting a former-stage reaction by adding maleic anhydride and a primary amine in amounts such that the molar ratio of said maleic anhydride to said primary amine is less than 1 under application of heat to a water-insoluble or water-immisible inert organic solvent containing an acid catalyst and subsequently carrying out a latter-stage reaction by adding to the reaction system maleic anhydride in an amount such that the molar ratio of the total amount of maleic anhydride to be added to said reaction system to the total amount of said primary amine added to said reaction system exceeds 1.

REFERENCES:
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patent: 4171302 (1979-10-01), Abblard et al.
patent: 4229351 (1980-10-01), Kiefer et al.
patent: 4500719 (1985-02-01), Oga et al.
patent: 4605700 (1986-08-01), Lo-Khuc
patent: 4623734 (1986-11-01), Kita et al.
patent: 4786738 (1988-11-01), Kita et al.

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