Compositions: coating or plastic – Coating or plastic compositions – Marking
Reexamination Certificate
2006-03-21
2006-03-21
Saeed, Kamal A. (Department: 1626)
Compositions: coating or plastic
Coating or plastic compositions
Marking
C548S552000
Reexamination Certificate
active
07014697
ABSTRACT:
This invention relates to a process for producing 5-methyl-N-(methyl aryl)-2-pyrrolidone, 5-methyl-N-(methyl cycloalkyl)-2-pyrrolidone and 5-methyl-N-alkyl-2-pyrrolidone by reductive amination of levulinic acid esters with aryl or alkyl cyano compounds utilizing a metal catalyst, which is optionally supported.
REFERENCES:
patent: 3235562 (1966-02-01), Shilling et al.
patent: 3337585 (1967-08-01), Swakon et al.
patent: 6841520 (2005-01-01), Manzer
Deitch Gerald E.
E.I. du Pont de Nemours and Company
Saeed Kamal A.
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