09024031 is referenced by 16 patents and cites 172 patents.

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.

Title
-pyrazol-1-yl)pyridine
Process for the preparation of 3-(3-chloro-1
Application Number
14/517344
Publication Number
9024031 (B1)
Application Date
October 17, 2014
Publication Date
May 5, 2015
Inventor
David E Podhorez
Midland
MI, US
Beth Lorsbach
Indianapolis
IN, US
Qiang Yang
Zionsville
IN, US
Agent
Barnes & Thornburg
Carl D Corvin
Assignee
Dow AgroSciences
IN, US
IPC
C07D 401/04
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