1
Qiang Yang, Beth Lorsbach, Carl DeAmicis, Ann M Buysse, Ronald Ross Jr, Xiaoyong Li: Process for the preparation of 3-(3-chloro-1H-pyrazol-1-yl)pyridine. Dow ArgoSciences, Carl D Corvin, Barnes & Thornburg, May 12, 2015: US09029556 (17 worldwide citation)

3-(3-Chloro-1H-pyrazol-1-yl)pyridine is prepared by coupling 3-bromopyridine with commercially available 3-aminopyrazole, purifying the 3-(3-amino-1H-pyrazol-1-yl)pyridine by crystallization, and converting the amino group to a chloro group by a Sandmeyer reaction.


2
Xiaoyong Li, Qiang Yang, Gary Roth, Beth Lorsbach: Process for the preparation of 3-(3-chloro-1H-pyrazol-1-yl)pyridine. Dow AgroSciences, Carl D Corvin, Barnes & Thornburg, May 12, 2015: US09029555 (16 worldwide citation)

3-(3-Chloro-1H-pyrazol-1-yl)pyridine is prepared by cyclizing 3-hydrazinopyridine-.dihydrochloride with commercially available 3-ethoxyacrylonitrile to provide 3-(3-amino-1H-pyrazol-1-yl)pyridine, and by converting the amino group to a chloro group by a Sandmeyer reaction.


3
Xiaoyong Li, Qiang Yang, Beth Lorsbach: Process for the preparation of 3-(3-chloro-1H-pyrazol-1-yl)pyridine. Dow AgroSciences, Carl D Corvin, Barnes & Thornburg, October 13, 2015: US09156813 (9 worldwide citation)

This disclosure relates to the field of preparation of 3-(3-chloro-1H-pyrazol-1-yl)pyridine and intermediates therefrom. These intermediates are useful in the preparation of certain pesticides.


4
Xiaoyong Li, Qiang Yang, Gary Roth, Beth Lorsbach: Process for the preparation of 3-(3-chloro-1H-pyrazol-1-yl)pyridine. Dow AgroSciences, Carl D Corvin, Barnes & Thornburg, February 9, 2016: US09255081 (6 worldwide citation)

3-(3-Chloro-1H-pyrazol-1-yl)pyridine is prepared by cyclizing 3-hydrazinopyridine.dihydrochloride with commercially available 3-ethoxyacrylonitrile to provide 3-(3-amino-1H-pyrazol-1-yl)pyridine, and by converting the amino group to a chloro group by a Sandmeyer reaction.


5
Xiaoyong Li, Qiang Yang, Gary Roth, Beth Lorsbach: Process for the preparation of 3-(3-chloro-1H-pyrazol-1-yl)pyridine. Dow AgroSciences, Carl D Corvin, Barnes & Thornburg, February 28, 2017: US09580403 (2 worldwide citation)

3-(3-Chloro-1H-pyrazol-1-yl)pyridine is prepared by cyclizing 3-hydrazinopyridine-dihydrochloride with commercially available 3-ethoxyacrylonitrile to provide 3-(3-amino-1H-pyrazol-1-yl)pyridine, and by converting the amino group to a chloro group by a Sandmeyer reaction.


6
Xiaoyong Li, Qiang Yang, Beth Lorsbach: Process for the preparation of 3-(3-chloro-1H-pyrazol-1-yl)pyridine. Dow AgroSciences, Carl D Corvin, Barnes & Thornburg, August 23, 2016: US09422265 (2 worldwide citation)

This disclosure relates to the field of preparation of 3-(3-chloro-1H-pyrazol-1-yl)pyridine and intermediates therefrom. These intermediates are useful in the preparation of certain pesticides.


7
Qiang Yang, Beth Lorsbach, David E Podhorez: Process for the preparation of 3-(3-chloro-1H-pyrazol-1-yl)pyridine. Dow AgroSciences, Carl D Corvin, Barnes & Thornburg, December 20, 2016: US09522900 (2 worldwide citation)

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 oxid ...


8
Xiaoyong Li, Qiang Yang, Gary Roth, Beth Lorsbach: Process for the preparation of 3-(3-chloro-1h-pyrazol-1-yl)pyridine. Dow Agrosciences, Carl D Corvin, Barnes & Thornburg, July 31, 2018: US10035786

3-(3-Chloro-1H-pyrazol-1-yl)pyridine is prepared by cyclizing 3-hydrazinopyridine.dihydrochloride with commercially available 3-ethoxyacrylonitrile to provide 3-(3-amino-1H-pyrazol-1-yl)pyridine, and by converting the amino group to a chloro group by a Sandmeyer reaction.


9
PROCESS FOR THE PREPARATION OF 3-(3-CHLORO-1H-PYRAZOL-1-YL)PYRIDINE. February 4, 2016: US20160031849-A1

3-(3-Chloro-1H-pyrazol-1-yl)pyridine is prepared by coupling 3-bromopyridine with commercially available 3-aminopyrazole, purifying the 3-(3-amino-1H-pyrazol-1-yl)pyridine by crystallization, and converting the amino group to a chloro group by a Sandmeyer reaction.


10
PROCESS FOR THE PREPARATION OF 3-(3-CHLORO-1H-PYRAZOL-1-YL)PYRIDINE. February 4, 2016: US20160031850-A1

3-(3-Chloro-1H-pyrazol-1-yl)pyridine is prepared by cyclizing 3-hydrazinopyridine-dihydrochloride with acrylonitrile to provide 1-(pyridin-3-yl)-4,5-dihydro-1H-pyrazol-3-amine, by oxidizing to provide 3-(3-amino-1H-pyrazol-1-yl)pyridine, and by converting the amino group to a chloro group by a Sandm ...