Patent · US Active

Process for the preparation of 3-(3-chloro-1H-pyrazol-1-yl)pyridine

US9580403B2 · kind B2 · utility

10Cited by

52References

9Claims

0Family size

Assignee

DOW AGROSCIENCES LLC · US

Inventors

Xiaoyong Li · Midland, US
Qiang Yang · Ellicott City, US
Gary Roth · Midland, US
Beth Lorsbach · Indianapolis, US

Key dates

Filing date	Jan 6, 2016
Grant date	Feb 28, 2017
Priority date	—
Expiry date	Jan 6, 2036

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D401/04
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.