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US 2016/0244427 A1Published application
Process for the preparation of 3-(3-chloro-1h-pyrazol-1-yl)pyridine
AssigneeDow AgroSciences LLC
InventorsQiang YANG, Beth LORSBACH, Carl DeAMICIS, Ann BUYSSE, Ronald ROSS, JR., Xiaoyong LI
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Abstract
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.
Claims17
1-4. (canceled)
A process for preparing 3-(3-chloro-1H-pyrazol-1-yl)pyridine (5b)
- comprising
- a) treating 3-bromopyridine with 3-aminopyrazole with 3-aminopyrazole in the presence of copper chloride and a base.
Dependencies are inferred from the claim text.