Method for the production of N-vinyl-2-pyrrolidone by vinylation

Details Method for the production of N-vinyl-2-pyrrolidone by vinylation Method for the production of N-vinyl-2-pyrrolidone by vinylation

1996-01-22

1997-09-09

Haley, Jacqueline

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548552, C07D207263

Patent

active

056658893

ABSTRACT:
The present invention relates to a method for the production of N-vinyl-2-pyrrolidone with high selectivity. The method is characterized in subjecting 2-pyrrolidone and acetylene to vinylation by using hydroxy end-capped ether oligomers having a molecular weight less than 1000 or linear diols having at least 4 carbon atoms as co-catalysts under the catalyzation of alkali metal salts. At a vinylation temperature of 100.degree.-200 .degree. C., a reaction pressure of 7.5-30 atm and a reaction time period of 3-20 hours, N-vinyl-2-pyrrolidones are obtained with yields above 90%.

REFERENCES:
patent: 4410726 (1983-10-01), Parthasarathy et al.
patent: 4873336 (1989-10-01), Liu et al.
patent: 5461159 (1995-10-01), Huckestein et al.

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