Patent ID: 9580405
Date: 2017-02-28
CPC Classifications: A01N,C07D

Claim:
1. A process for producing 3-(3-chloro-1H-pyrazol-1-yl)pyridine (5b) said process comprising (a) reacting 3-hydrazinopyridine dihydrochloride with methyl 2-acetamidoacrylate to yield N-(3-oxo-1-(pyridin-3-yl)pyrazolidin-4-yl)acetamide; and (b) chlorinating/eliminating N-(3-oxo-1-(pyridin-3-yl)pyrazolidin-4-yl)acetamide to yield 3-(3-chloro-1H-pyrazol-1-yl)pyridine (5b)