HuagongsheHuagongshe Chemistry Print Report · For research reference only
Heptane → 3-(tert-Butyl)-1-(p-tolyl)-1H-pyrazol-5-amine hydrochloride
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Heptane | HCID 8900 | — |
| Reactant | 4-Methylphenylhydrazine monohydrochloride | HCID 12504 | — |
| Reactant | Pentanenitrile, 4,4-dimethyl-3-oxo- | HCID 108871 | — |
| Solvent | Methanol | HCID 887 | — |
| Product | 3-(tert-Butyl)-1-(p-tolyl)-1H-pyrazol-5-amine hydrochloride | HCID 11991200 | — |
Reaction Steps
A solution of pivaloylacetonitrile (750 g, 6.0 mol) and p-tolylhydrazine hydrochloride (660 g, 4.2 mol) in methanol (2.8 L) was refluxed for 3 h. Heptane was added, and methanol was removed by distillation. The product was crystallized from the solution, collected by filtration and dried in vacuum oven to constant weight. Yield: 1.05 kg, 94%. 1H NMR δ(CDCl3) 7.50 (d, 2H), 7.30 (d, 2H), 5.60 (s, 1H), 2.45 (s, 3H), 1.40 (s, 9H). MS (CI) m/z 229 (M++H).
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US06774233B2 |
| Source dataset | uspto-grants-2004_08 |
| ORD ID | ord-b541a6108df14fec971894d49d2c7ed3 |
| Source note | uspto-grants-2004_08 |