Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Having -c- – wherein x is chalcogen – bonded directly to...
Reexamination Certificate
2005-02-15
2005-02-15
Powers, Fiona T. (Department: 1626)
Drug, bio-affecting and body treating compositions
Designated organic active ingredient containing
Having -c-, wherein x is chalcogen, bonded directly to...
C106S031490, C106S031760, C252S068000, C504S138000, C504S283000, C548S543000, C548S554000
Reexamination Certificate
active
06855731
ABSTRACT:
This invention relates to a process for producing 5-methyl-N-aryl-2-pyrrolidone, 5-methyl-N-cycloalkyl-2-pyrrolidone, and 5-methyl-N-alkyl-2-pyrrolidone by reductive amination of levulinic acid esters with nitro compounds utilizing a metal catalyst, which is optionally supported.
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E. I. du Pont de Nemours and Company
Powers Fiona T.
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