Process for the preparation of dimethylmaleic anhydride

Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...

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C07D30760

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046440690

ABSTRACT:
The reaction of maleic acid, fumaric acid and/or maleic anhydride in the presence of N-acylated heterocyclic amidines and at elevated temperature affords dimethylmaleic anhydride in good yield. Catalytic amounts of the amidine employed are sufficient for said reaction.

REFERENCES:
patent: 3818050 (1974-06-01), Baumann et al.
patent: 3833619 (1974-09-01), Baumann et al.
patent: 4480106 (1984-10-01), Breitenstein et al.
M. E. Baumann et al, Helv. Chim Acta 61, 2751 (1978).

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