Production of 5-methyl-N-aryl-2-pyrrolidone and...

Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...

Reexamination Certificate

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Reexamination Certificate

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07129362

ABSTRACT:
This invention relates to a process for producing 5-methyl-N-aryl-2-pyrrolidone, 5-methyl-N-alkyl-2-pyrrolidone, and 5-methyl-N-cycloalkyl-2-pyrrolidone by reductive amination of levulinic acid esters with aryl or alkyl amines utilizing a metal catalyst, which is optionally supported.

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patent: 3337585 (1967-08-01), Swakon et al.
patent: 4590190 (1986-05-01), Saito et al.
patent: 5156666 (1992-10-01), Narayanan et al.
patent: 5302197 (1994-04-01), Wickramanayke et al.
patent: 2003/0034477 (2003-02-01), Minor et al.
patent: WO 03/006597 (2003-01-01), None

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