首页>
外国专利>
foerfarande foer framstaellning av 2,3,5 - triklorpyridin 2,4,4 - triklor - 4 - formyl - butyronitril som ny foerening och dess framstaellning foerfarande foer
foerfarande foer framstaellning av 2,3,5 - triklorpyridin 2,4,4 - triklor - 4 - formyl - butyronitril som ny foerening och dess framstaellning foerfarande foer
展开▼
机译：新化合物2,3,5-三氯吡啶2,4,4-三氯-4-甲酰基-丁腈的制备方法及其制备工艺研究。
展开▼
页面导航
摘要
著录项
相似文献
摘要
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 cyclization of the intermediately formed 2,4,4-trichloro-4-formylbutyronitrile, with the splitting-off of water, to give 2,3,5-trichloropyridine. 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 acrylonitrile in the presence of a catalyst. 2,3,5-Trichloropyridine can be used as intermediate for the production of herbicidal active substances.
展开▼
