Process for the synthesis of citraconimides

Details Process for the synthesis of citraconimides Process for the synthesis of citraconimides

1992-01-16

1994-07-12

Springer, David B.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548521, C07D20744, C07D40302, C07D40306

Patent

active

053290224

ABSTRACT:
The present invention relates to an improved synthesis method for the making of citraconimides wherein a citraconic anhydride is reacted with 0.5 to 2.0 equivalents of at least one amine salt. This process may be carried out in a solvent and generally leads to excellent yields of the citraconimides with high selectivity and easy purification. The present inventional so relates to a process for the production of citraconic anhydride from itaconic anhydride with an amine or phosphine catalyst and in a cosolvent.

REFERENCES:
patent: 2444536 (1948-07-01), Searle
patent: 2966498 (1960-12-01), Humphrey
patent: 4130564 (1978-12-01), Haug et al.
Journal of Polymer Science: Polymer Chemistry Ed. vol. 16, No. 1, pp. 137-153 (1978) John Wiley & Sons, Inc.
Journal of Polymer Science: Polymer Chemistry Ed. vol. 19, No. 2, pp. 451-475 (1981) John Wiley & Sons, Inc.
Journal of Polymer Science: Polymer Chemistry Ed. vol. 20, pp. 233-239 (1982) John Wiley & Sons, Inc.
J. Org. Chem., vol. 47, 1572-1574 (1982) American Chemical Society.
Cram and Hammond 2nd Ed. (1964) McGraw Hill, New York, N.Y. p. 362.

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