C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
260/295.2, 260/5
C07D 213/61 (2006.01) C07C 121/34 (1980.01)
Patent
CA 1123836
Abstract A novel process for producing 2,3,5-trichloropyridine is described. The process comprises the addition reaction of trichloroacetaldehyde with acrylonitrile in the presence of a catalyst, and the subsequent cyclisation of the intermediately formed 2,4,4-trichloro-4-formylbutyronitrile, with the splitting-off of water, to give 2,3,5-trichloro- pyridine. 2,4,4-Trichloro-4-formylbutyronitrile occurring as an intermediate product in the process according to the invention is a novel compound. It can be produced by the addition reaction of trichloroacetaldehyde with acrylo- nitrile in the presence of a catalyst. 2,3,5-Trichloropyridine can be used as intermediate for the production of herbicidal active substances.
341061
Bellus Daniel
Martin Pierre
Steiner Eginhard
Fetherstonhaugh & Co.
Novartis Ag
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