| abstract |
The present invention distills the water released with the reaction at a pressure of 0.02 to 1.5 bar at a temperature of 100 to 160 ° C. in the presence of tertiary amine bases of the formulas (3), (4) and (5), followed by The present invention relates to a process for preparing nitrile of formula (1) consisting of reacting an aldehyde of formula (2) with hydroxylaminosulfate while removing the nitrile thus obtained in a conventional manner.n n n n n n n n In the formula, X is CH or N, R 1 and R 2 are each independently hydrogen, chloro, bromo, C 1 -C 6 alkyl, C1-C 6 alkoxy, C 1 -C 6 alkylamino, CN each other , Phenyl, phenoxy, dimethylamino, piperidyl, morpholinyl or pyrrolidyl, or R 1 and R 2 are fused together to form a benzene ring, and R 3 and R 4 are each independently hydrogen, Methyl or ethyl, R 5 is branched C 3 -C 5 alkyl or phenyl, and R 6 and R 7 are methyl or ethyl. |