Synthesis of certain triazole compounds
US6657066B1 · kind B1 · utility
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22Claims
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Key dates
| Filing date | Dec 10, 2002 |
| Grant date | Dec 2, 2003 |
| Priority date | — |
| Expiry date | Dec 10, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D487/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Disclosed is a process for forming a 1H-pyrazolo (1,5-b)-[1,2,4]-triazole compound by ring closing a pyrazoloamidine compound comprising reacting the amidine with an oxidizing agent having a reduction potential vs Ag/AgCl that is more positive than −0.16V and less than +1.43V in the presence of a halogen atom. The invention also discloses certain triazole compounds that are successfully made by the conventional process. The process and compounds of the invention provide improved yields and reduce or eliminate unwanted side-reactions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.