HuagongsheHuagongshe Chemistry Print Report · For research reference only
3-Fluorobenzoic Acid → 4-(3-Fluoro-benzoyl)-piperazine-1-carboxylic acid tert-butyl ester
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | 3-Fluorobenzoic Acid | HCID 9968 | — |
| Reactant | 1-Hydroxybenzotriazole | HCID 75771 | — |
| Reactant | Diisopropylethylamine | HCID 81531 | — |
| Reactant | tert-Butyl piperazine-1-carboxylate | HCID 143452 | — |
| Reactant | 1,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochloride | HCID 2723939 | — |
| Solvent | Water | HCID 962 | — |
| Solvent | Dimethylformamide | HCID 6228 | — |
| Product | 4-(3-Fluoro-benzoyl)-piperazine-1-carboxylic acid tert-butyl ester | HCID 57875809 | 107.5% |
Reaction Steps
HOBt (290 mg, 2.14 mmol), DIEA (461 mg, 3.5 mmol), EDCI.HCl (410 mg, 2.14 mmol) followed by piperazine-1-carboxylic acid tert-butyl ester (398 mg, 2.14 mmol) were added to a stirred solution of 3-fluorobenzoic acid (250 mg, 1.78 mmol) in DMF (3 mL). The reaction mixture was stirred overnight and then diluted with cold water. The product was extracted with ethyl acetate and the organic layer was washed with brine solution, dried over Na2SO4, and concentrated under reduced pressure to afford 590 mg (92%) of 4-(3-fluoro-benzoyl)-piperazine-1-carboxylic acid tert-butyl ester.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US08039463B2 |
| Source dataset | uspto-grants-2011_10 |
| ORD ID | ord-68db923e4e6b4683a2dfaab4c13215a0 |
| Source note | uspto-grants-2011_10 |