Catalytic preparation of cyanoalkyl lactams

Details Catalytic preparation of cyanoalkyl lactams Catalytic preparation of cyanoalkyl lactams

C - Chemistry, Metallurgy

07

D

260/391.1, 260/2

C07D 223/10 (2006.01) C07D 227/087 (2006.01)

Patent

CA 1320956

173PUS03671 ABSTRACT OF THE DISCLOSURE This invention relates to an improved process for the preparation of cyanoalkyl lactams by the reaction of an unsaturated nitrile with a lactam, said cyanoalkyl lactam of the formula Image wherein R is H, or methyl, R1 is H, methyl or ethyl and n is a number ranging from 2-11 and wherein each of the methylene groups may carry a lower alkyl substituent as shown. The improvement comprises: reacting said lactam with an alpha-beta unsaturated nitrile having from 3-6 carbon atoms in the presence of a catalytic amount of a diazabicycloalkene of the formula Image wherein R, R1 and n have the above meaning. Typically, acrylonitrile is reacted with .epsilon.-caprolactam in the presence of diazabicycloundecene.

602873

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