HuagongsheHuagongshe Chemistry Print Report · For research reference only
Pyridine → 3,5-Dimethyl-1-(3-nitrophenyl)-1H-pyrazole-4-carboxylic acid ethyl ester
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Pyridine | HCID 1049 | — |
| Reactant | Ethyl 2-acetylacetoacetate | HCID 79063 | — |
| Reactant | 3-Nitrophenylhydrazinium(1+) chloride | HCID 5464285 | — |
| Solvent | Ethanol | HCID 702 | — |
| Product | 3,5-Dimethyl-1-(3-nitrophenyl)-1H-pyrazole-4-carboxylic acid ethyl ester | HCID 656969 | — |
Reaction Steps
Similar to Example 1, m-nitrophenylhydrazine hydrochloride (10 mmol, 1.9 g) and 2-acetyl-3-oxo-butyric acid ethyl ester (10 mmol, 1.7 g) were mixed in a 50% solution of pyridine in ethanol. A precipitate was formed in the-reaction medium, and was collected by filtration. Analysis confirmed synthesis of the named product, m.p., 107.7° C.-109.2° C.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US06569885B1 |
| Source dataset | uspto-grants-2003_05 |
| ORD ID | ord-8f08129c4657462f81b6119311e69ad5 |
| Source note | uspto-grants-2003_05 |