HuagongsheHuagongshe Chemistry Print Report · For research reference only
4-Hydrazino-2-methylpyridine hydrobromide → 5-(3-Bromo-5-trifluoromethoxyphenyl)-1-(2-methylpyridin-4-yl)-1H-pyrazole-3-carboxylic acid
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | 4-Hydrazino-2-methylpyridine hydrobromide | HCID 50999449 | — |
| Reactant | 5-(3-Chloro-5-fluorophenyl)-1-(pyridin-2-yl)-1H-pyrazole-3-carboxylic acid | HCID 89602575 | — |
| Reactant | Lithium 1-(3-bromo-5-trifluoromethoxy phenyl)-4-ethoxy-3,4-dioxobut-1-en-1-olate | HCID 131734661 | — |
| Product | 5-(3-Bromo-5-trifluoromethoxyphenyl)-1-(2-methylpyridin-4-yl)-1H-pyrazole-3-carboxylic acid | HCID 89609932 | — |
Reaction Steps
500 mg (1.03 mmol) of the compound of Example 5A is reacted analogously to the synthesis of the compound of Example 20A with 315 mg (1.54 mmol) of 2-methylpyridin-4-yl-hydrazine hydrobromide. After hydrolysis, 182 mg (40% of theory) of the title compound is obtained.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US09296720B2 |
| Source dataset | uspto-grants-2016_03 |
| ORD ID | ord-2a2d2f57eb3a48f2a8b1e8f7d7a721de |
| Source note | uspto-grants-2016_03 |