Method for production of maleimides

Details Method for production of maleimides Method for production of maleimides

1988-12-23

1989-07-25

Brust, Joseph Paul

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

546167, 546281, 548546, 548547, 548549, C07D20740

Patent

active

048515477

ABSTRACT:
A method for the production of a maleimide by dehydration and ring-closure of maleinamic acid obtained by the reaction of maleic anhydride with an amine, which method is characterized by effecting ring-closure imidation of said maleinamic acid by heating said maleinamic acid in a water-insoluble or water-immiscible inert organic non-polar solvent in the presence of a catalyst of an amine salt produced from the amine and an acid, a mixture of the amine salt and the acid, or a supported catalyst on a solid carrier the catalyst or the acid.

REFERENCES:
patent: 2444536 (1948-07-01), Searle
patent: 3018292 (1962-01-01), Sauers et al.
patent: 3431276 (1969-03-01), Nield
patent: 3960887 (1976-06-01), Renard
patent: 4171302 (1979-10-01), Abblard et al.
patent: 4229351 (1980-10-01), Kiefer et al.
patent: 4623734 (1986-11-01), Kita et al.

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