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Class Information
Number: 548/553
Name: Organic compounds -- part of the class 532-570 series > Organic compounds (class 532, subclass 1) > Heterocyclic carbon compounds containing a hetero ring having chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) or nitrogen as the only ring hetero atoms (class 540, subclass 1) > Hetero ring is five-membered consisting of one nitrogen and four carbons (e.g., halopyrrolidines, etc.) > Chalcogen attached directly to the five-membered hetero ring by nonionic bonding (e.g., 3-pyrrolidinols, etc.) > Chalcogen bonded directly to a ring carbon of the five-membered hetero ring which is adjacent to the ring nitrogen (e.g., 2-pyrrolidones, etc.) > Processes of forming 2-pyrrolidone which is unsubstituted or alkyl or alkenyl substituted only > Directly from a cyano containing compound (e.g., from succinonitrile, etc.)
Description: Processes wherein the 2-pyrrolidone compound is prepared directly from a compound which contains the cyano group, -C-N.

Patents under this class:

Patent Number Title Of Patent Date Issued
7612216 Production of N-(methyl aryl)-2-lactam, N-(methyl cycloalkyl)-2-lactam and N-alkyl-2-lactam by reductive amination of lactones with aryl and alkyl cyano compounds Nov. 3, 2009
7458490 Article carrier assembly with removable stowable cross-rails and latching mechanism therefor Dec. 2, 2008
6906201 Production of N-(methyl aryl)-2-lactam, N-(methyl cycloalkyl)-2-lactam and N-alkyl-2-lactam by reductive amination of lactones with aryl and alkyl cyano compounds Jun. 14, 2005
6841520 Production of 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 with cyano compou Jan. 11, 2005
6100396 Method for purifying lactams Aug. 8, 2000
5739324 Preparation of caprolactam Apr. 14, 1998
5646277 Preparation of caoprolactam Jul. 8, 1997
5536723 S-nitroso derivatives of hydrazinoacetic acids, 1-[(acylthio and (mercapto)-1-oxoalkyl]-1,2,34-Tetrahydroquinoline-2-carboxylic acids and alanyl prolines and isoquinolines Jul. 16, 1996
5498734 Preparation and use of (2-butene-1,4-diyl)magnesium complexes in organic synthesis Mar. 12, 1996
5200527 Process for the production of 2-azabicyclo [2.2.1] hept-5-en-3-one Apr. 6, 1993
5136051 Preparation of 2-pyrrolidinones Aug. 4, 1992
4943633 Catalytic preparation of cyanoalkyl lactams Jul. 24, 1990
4886813 Proline derivatives Dec. 12, 1989
4874752 Benzoquinone derivatives and production thereof Oct. 17, 1989
4808573 Carboxyalkyl dipeptides and anti-hypertensive use thereof Feb. 28, 1989
4628085 Use of silica catalyst for selective production of lactams Dec. 9, 1986
4625023 Selective conversion of aliphatic and aromatic aminonitriles and/or dinitriles into lactams Nov. 25, 1986
4325872 Process for the preparation of a 2-pyrrolidone Apr. 20, 1982
4279820 Process for preparing 2-pyrrolidones Jul. 21, 1981
4250093 Process for the preparation of laotams Feb. 10, 1981
4216151 Process for the recovery of 2-pyrrolidone Aug. 5, 1980
4193925 Process for preparing 2-pyrrolidone Mar. 18, 1980
4183866 Method for preparing 3-cyanopropanol and 2-pyrrolidone Jan. 15, 1980
4181662 2-Pyrrolidone production Jan. 1, 1980
4152331 Process for the preparation of N-substituted 2-pyrrolidones May. 1, 1979
4123438 Process for preparing 2-pyrrolidones Oct. 31, 1978
4042599 Process for producing 2-pyrrolidone Aug. 16, 1977
4036836 Process for producing 2-pyrrolidone Jul. 19, 1977
4012418 Process for the preparation of pyrrolidone-2 Mar. 15, 1977
3966763 Process for producing 2-pyrrolidone Jun. 29, 1976

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