4-Nitrophenethyl alcohol → 2-(4-Nitrophenyl)ethyl 3,5-bis-(1,1-dimethylethyl)-4-hydroxybenzoate

HRID 393852Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 393852
[C:1]([C:5]1[CH:6]=[C:7]([CH:11]=[C:12]([C:15]([CH3:18])([CH3:17])[CH3:16])[C:13]=1[OH:14])[C:8]([OH:10])=[O:9])([CH3:4])([CH3:3])[CH3:2].[N+:19]([C:22]1[CH:27]=[CH:26][C:25]([CH2:28][CH2:29]O)=[CH:24][CH:23]=1)([O-:21])=[O:20].C1(N=C=NC2CCCCC2)CCCCC1>C1COCC1>[CH3:2][C:1]([C:5]1[CH:6]=[C:7]([CH:11]=[C:12]([C:15]([CH3:18])([CH3:17])[CH3:16])[C:13]=1[OH:14])[C:8]([O:10][CH2:29][CH2:28][C:25]1[CH:24]=[CH:23][C:22]([N+:19]([O-:21])=[O:20])=[CH:27][CH:26]=1)=[O:9])([CH3:4])[CH3:3]

Komponenten

5

Edukt 3

HCID 74944-Nitrophenethyl alcoholHCID 10868DicyclohexylcarbodiimideHCID 150073,5-Di-tert-butyl-4-hydroxybenzoic acid

Produkt 1

HCID 219185762-(4-Nitrophenyl)ethyl 3,5-bis-(1,1-dimethylethyl)-4-hydroxybenzoate

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel

Reaktionsbedingungen

Temperatur
20 °C

Versuchsvorschrift

In a 250 ml flask containing 80 ml of THF, under an argon atmosphere, 2.45 g (9.8 mmoles) of 3,5-di-tert-butyl-4-hydroxybenzoic acid, 1.8 g (10.8 mmoles) of 4-nitrobenzene-ethanol and 2.2 g (10.8 mmoles) of dicyclohexylcarbodiimide are introduced successively, under agitation. The reaction medium is agitated for 15 hours at 20° C. and the precipitate which appears is filtered out. The filtrate is washed with 2×30 ml of a saturated NaCl solution, the organic phase is dried over magnesium sulphate, filtered and concentrated under vacuum. The residue is then crystallized using di-isopropyl ether. The solid is recovered by filtration and 2.4 g (62%) of white crystals are obtained after drying. Melting point: 123.5-124.5° C.

Aufarbeitung

  1. filtrationthe precipitate which appears is filtered out
  2. washThe filtrate is washed with 2×30 ml of a saturated NaCl solution
  3. dry with materialthe organic phase is dried over magnesium sulphate
  4. filtrationfiltered
  5. concentrationconcentrated under vacuum
  6. customThe residue is then crystallized
  7. filtrationThe solid is recovered by filtration and 2.4 g (62%) of white crystals
  8. customare obtained
  9. customafter drying

Quellen und Nachweise

ORD-Eintrag
ord-cfa1d991af5944b4a54f674e2b81f544
Quelldatensatz
uspto-grants-2004_10
Patentnummer
US06809088B2

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