Preparation of N-substituted maleimides by use of tin catalysts

Details Preparation of N-substituted maleimides by use of tin catalysts Preparation of N-substituted maleimides by use of tin catalysts

1990-06-11

1991-11-26

Springer, David B.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548521, C07D20742, C07D40306, C07D40310, C07D40312

Patent

active

050683578

ABSTRACT:
A process for the preparation of N-substituted maleimides by conducting heat-dehydration and dehydrating imidization of N-substituted maleamic acids under azeotropic distillation of generated water in a solvent mixture containing a solvent capable of forming water azeotrope and an organic aproptic polar solvent, in the presence as catalyst of metallic tin, tin oxide, a tin salt of a maleamic acid or a tin compound which forms a thin salt of the N-substituted maleamic acid in the reaction system.

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