Process for the preparation of 3-haloalkylpyrazoles
US9359304B2 · kind B2 · utility
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Key dates
| Filing date | Aug 3, 2011 |
| Grant date | Jun 7, 2016 |
| Priority date | — |
| Expiry date | Aug 3, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D409/12
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention provides a process for the preparation of a compound of formula (I) wherein R1 is C1-C4 haloalkyl; R2 is optionally substituted alkyl, optionally substituted aryl or optionally substituted heteroaryl; and R3 is methyl or ethyl; comprising reacting a compound of formula (IV) wherein R1, R2 and R3 are as defined for the compound of formula I; with an alkylating agent in the presence of an amide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.