HuagongsheHuagongshe Chemistry Print Report · For research reference only
Ethylene Glycol → Piperazine, 1-methyl-4-phenyl-
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Ethylene Glycol | HCID 174 | — |
| Reactant | Iodobenzene | HCID 11575 | — |
| Reactant | 1-Methylpiperazine | HCID 53167 | — |
| Reactant | Potassium Phosphate, Tribasic | HCID 62657 | — |
| Catalyst | Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI) | HCID 24350 | — |
| Solvent | Isopropanol | HCID 3776 | — |
| Solvent | Ethyl acetate hexane | HCID 21226206 | — |
| Product | Piperazine, 1-methyl-4-phenyl- | HCID 200991 | 71% |
Reaction Steps
The general procedure under argon was followed using copper(I) iodide (10 mg, 0.05 mmol), K3PO4 (425 mg, 2.00 mmol), N-(methyl)piperazine (166 μL, 1.50 mmol), iodobenzene (112 μL, 1.00 mmol), ethylene glycol (111 μL, 2.00 mmol) and 2-propanol (1.0 mL). Column chromatography using a solvent mixture (hexane/ethyl acetate=20/1, Rf=0.1) afforded N-phenyl-N′-(methyl)piperazine (125 mg, 71% isolated yield) as colorless liquid. The spectral data (1H NMR) matched with the literature references and GC analysis indicated >95% purity.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US06867298B2 |
| Source dataset | uspto-grants-2005_03 |
| ORD ID | ord-e8359b70141e4fbf8af165140ed14a9c |
| Source note | uspto-grants-2005_03 |