Process for preparing N-alkyl-lactams

Details Process for preparing N-alkyl-lactams Process for preparing N-alkyl-lactams

1975-03-28

1976-08-17

Trousof, Natalie

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2602393A, C07D20114

Patent

active

039753778

ABSTRACT:
A process for preparing pure N-alkyl-lactams obtained by the reaction, in an organic solvent medium of, the corresponding lactamate of an alkali metal and an alkyl halide. This process consists of treating a reactive mixture of N-alkyl-lactam containing the corresponding cyclo-alkylene imine as an impurity with a current of carbon dioxide, until the cyclo-alkylene imine precipitates completely in the form of an insoluble carbonate, and then separating it from the precipitate.

REFERENCES:
ruzicka, "Helv. Chim. Acta.", vol. 4, pp. 472-482 (1921).
Marvel et al., "J. Org. Chem.", vol. 22, pp. 1065-1067 (1957).
Moriarty et al., "J. Org. Chem.", vol. 29, pp. 2748-2750 (1964).
Ciaperoni et al., Chim. Ind. (Milan), vol. 50, pp. 772-773 (1968).
Novikov et al., IZV. Vyssh. Vohed. Zazed., Khim. Khim. Tekhnol. (1973), vol. 16, No. 2, pp. 304-305.
Abstracted in Chemical Abstracts, vol. 78 (1973), Item 159395.

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