PROCESSES FOR THE PREPARATION OF PESTICIDAL COMPOUNDS
申请人:Dow AgroSciences LLC
公开号:US20150112078A1
公开(公告)日:2015-04-23
The present application provides processes for making pesticidal compounds and compounds useful both as pesticides and in the making of pesticidal compounds.
本申请提供了用于制造杀虫化合物的过程,以及既可用作杀虫剂又可用于制造杀虫化合物的化合物。
Processes for the preparation of pesticidal compounds
申请人:Dow AgroSciences LLC
公开号:US09102654B2
公开(公告)日:2015-08-11
The present application provides processes for making pesticidal compounds and compounds useful both as pesticides and in the making of pesticidal compounds.
本申请提供了制备杀虫化合物以及既可用作杀虫剂又可用于制备杀虫剂化合物的过程。
Process for the preparation of 3-(3-chloro-1H-pyrazol-1-yl)pyridine
申请人:Dow AgroSciences LLC
公开号:US10005758B2
公开(公告)日:2018-06-26
3-(3-chloro-1H-pyrazol-1-yl)pyridine is prepared by cyclizing 3-hydrazinopyridine-.dihydrochloride with a dialkyl maleate to provide an alkyl 5-oxo-2-(pyridin-3-yl)pyrazolidine-3-carboxylate, by chlorinating to provide an alkyl 3-chloro-1-(pyridin-3-yl)-4,5-dihydro-1H-pyrazole-5-carboxylate, by oxidizing to provide an alkyl 3-chloro-1-(pyridin-3-yl)-1H-pyrazole-5-carboxylate, by converting the ester to the carboxylic acid by hydrolysis to provide 3-chloro-1-(pyridin-3-yl)-1H-pyrazole-5-carboxylic acid hydrochloride, and by removing the carboxylic acid by a decarboxylation reaction.