Method for the production of omega lactams and their...

Details Method for the production of omega lactams and their... Method for the production of omega lactams and their...

C - Chemistry, Metallurgy

07

D

260/391, 260/592

C07D 201/02 (2006.01) C07D 201/10 (2006.01)

Patent

CA 1038869

ABSTRACT A method for the preparation of omega lactams is disclosed, more particularly epsilon caprolactam or a precursor thereof (such as cyclohexanone oxime), using as the starting material a cyclomethylene ketene, with the simultaneous formation of side products such as cyclohexanecarboxylic acid, wherein an adduct is pre- liminarly formed between cyclomethylene ketene and sulphur dioxide. The adduct is then reacted with a nitorsating agent so as to obtain, under the appropriate reaction conditions, the expected lactam, more specifical- ly epsilon caprolactam.

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