Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate
2006-04-18
2006-04-18
Saeed, Kamal A. (Department: 1626)
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
C549S266000
Reexamination Certificate
active
07030249
ABSTRACT:
This invention relates to a process for producing 5-methyl-N-alkyl-2-pyrrolidone by a) reacting α-angelica lactone with alkyl amines and b) hydrogenating the products of step (a) in the presence of a metal catalyst, which is optionally supported.
REFERENCES:
patent: 2809203 (1957-10-01), Leonard
patent: 3235582 (1966-02-01), Shilling
C. Wedler et al, Synthesis of 5-Methyl- and 5-Methylenepyrrolidin-2-ones by Reaction of α-Angelica Lactone with Methylamine, Journal für Praktische Chemie, vol. 332, No. 4, 1990, pp. 557-562 (XP008039370).
Paitoon Rashatasakhon et al., The Reaction of Cyclic Carbinol Amides with Triflic Anhydride as a Method to Prepare α-Trifluoromethyl-Sulfonamido Furans, Organic Letters, vol. 5, No. 2, 2003 pp. 189-191 (XP002307750).
Deitch Gerald E.
E. I. uPont de Nemours and Company
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