Process for the preparation of p-hydroxy-benzyl- nitriles

Details Process for the preparation of p-hydroxy-benzyl- nitriles Process for the preparation of p-hydroxy-benzyl- nitriles

C - Chemistry, Metallurgy

07

C

260/559.5, 260/6

C07C 91/30 (1985.01) C07C 121/75 (1985.01)

Patent

CA 1187902

ABSTRACT OF THE DISCLOSURE A process is provided for the preparation of p-hydroxy-benzyl- nitriles starting from the corresponding p-hydroxy-benzaldehyde, first reducing the p-hydroxy-benzaldehyde to the p-hydroxy-benzyl amine, a primary amine, with hydrogen in the presence of aqueous ammonia, preferably with the addition of small amounts of lower alkyl alcohol, and Raney nickel catalyst a' low pressure; and then converting the amine to the p-hydroxy-benzyl-nitrile by reaction with sodium cyanide at elevated temperature; the first stage, the reduction, is applicable also to o- and m-hydroxy benzaldehydes.

423548

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