Process for the preparation of 3-(3-chloro-1H-pyrazol-1-yl)pyridine
US9371310B2 · kind B2 · utility
19Cited by
35References
9Claims
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Key dates
| Filing date | Mar 24, 2015 |
| Grant date | Jun 21, 2016 |
| Priority date | — |
| Expiry date | Mar 24, 2035 |
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 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.