Process for the preparation of N-substituted lactams

Details Process for the preparation of N-substituted lactams Process for the preparation of N-substituted lactams

1992-07-24

1994-08-16

Springer, David B.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548427, 548472, 548952, 546101, 546154, 546290, 540451, 540470, 540485, 540476, C07D21522, C07D21364, C07D20104, C07D207267

Patent

active

053388615

ABSTRACT:
Substituted lactams of the formula ##STR1## can be prepared from lactam N-carboxylates or lactim O-carboxylates of the formulae ##STR2## by thermal or mixed thermal and catalysed CO.sub.2 elimination at 80.degree.-450.degree. C. Lactams substituted on the N atom by aliphatic groups such as those produced herein are useful as industrial aprotic solvents.

REFERENCES:
CA86(22):161290k, "Vehicle compositon containing 1-substituted azacyloheptan . . . ", Chem. Abstr. 16 Feb. 1987 p. 18.
CA99(3):.+-.8122v, "Plant pest control", Chem. Abstr. 16 Feb. 1987, p. 10.
CA81(18):106237v, "N-Alkyllactams", Chem. Abstr. 16 Feb. 1987, p. 21.
H. Glaser, Stickstoff-verbindungen II, 1957, pp. 948-952.
Klaus Wehner, "Entwicklung eines technischen Verfahrens zur Herstellung von N-Methyl-.epsilon.-caprolactam," Apr. 1981, p. 196.

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