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.
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.
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.