Beteiligte Stoffe
| Rolle | Name | HCID | Einwaage |
|---|
| Edukt | Hydrochloric Acid | HCID 313 | — |
| Edukt | Diethyl Ether | HCID 3283 | — |
| Edukt | Ethyl 3-bromo-4-methylbenzoate | HCID 14945865 | — |
| Edukt | Aluminium lithium hydride | HCID 21226445 | — |
| Lösungsmittel | Tetrahydrofuran | HCID 8028 | — |
| Produkt | (3-Bromo-4-methylphenyl)methanol | HCID 12947381 | 90% |
Reaktionsschritte
Ethyl 3-bromo-4-methylbenzoate was reduced follows: 2 equivalents lithium aluminium hydride (LAH) in THF was cooled to 0° C. Ethyl 3-bromo-4-methylbenzoate in anhydrous THF (10 mL) was added slowly to the cooled solution of LAH over 10 minutes, while stirring. The mixture was stirred at room temperature for 1 hour. The reaction was cooled to 0° C. and poured into ether (100 mL). The mixture was acidified by adding 1N HCl (aqueous) dropwise over 10 minutes. Separate fractions and wash aqueous phase with ether (50 mL). The fractions were combined and dried over magnesium sulfate. Solvent removal left a clear oil. The yield was 90%. 1H NMR (Varian 300 MHz, CDCl3, shifts relative to the solvent peak at 7.24 ppm) δ 7.5 (s, 1H) 7.2 (d, 1H) 7.1 (d, 1H), 4.6 (s, 2H) 2.3 (s, 3H).
Herkunft & Nachweise
| DOI | 10.6084/m9.figshare.5104873.v1 |
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| Patentnummer | US07732444B2 |
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| Quelldatensatz | uspto-grants-2010_06 |
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| ORD ID | ord-03c3dc8dddf7458c8f6b03aa9367ac2d |
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| Quellennotiz | uspto-grants-2010_06 |
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