tert-Butanol → tert-Butyl (4-methylphenyl)acetate

HRID 1066761

Reaktionsgleichung

Reaktionsgleichung von HRID 1066761
[CH3:1][C:2]1[CH:7]=[CH:6][C:5]([CH2:8][C:9]([OH:11])=[O:10])=[CH:4][CH:3]=1.[C:12](O)([CH3:15])([CH3:14])[CH3:13].C(N(C1C=CN=CC=1)CC)C.C1(N=C=NC2CCCCC2)CCCCC1>ClCCl>[CH3:1][C:2]1[CH:3]=[CH:4][C:5]([CH2:8][C:9]([O:11][C:12]([CH3:15])([CH3:14])[CH3:13])=[O:10])=[CH:6][CH:7]=1

Komponenten

6

Edukt 4

HCID 6386tert-ButanolHCID 10868DicyclohexylcarbodiimideHCID 248474p-Tolylacetic acidHCID 117687514-Diethylaminopyridine

Produkt 1

HCID 12362014tert-Butyl (4-methylphenyl)acetate

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel2×

Reaktionsbedingungen

Temperatur
25 °C

Versuchsvorschrift

450 g (3 mol) of 4-methylphenyl-acetic acid (Aldrich), 1.13 l (12 mol) of tert-butanol and 90 g (0.74 mol) of 4-(N,N-diethylamino)pyridine are dissolved in 2 l of dichloromethane. After addition of 680 g (3.3 mol of dicyclohexylcarbodiimide, dissolved in 400 ml of dichloromethane, the mixture is stirred at 25° C. for 20 h, the precipitated urea is filtered off with suction and washed with 200 ml of dichloromethane, and the organic phase is washed twice each with 500 ml of 2 M hydrochloric acid and water. The organic phase is concentrated and distilled.

Aufarbeitung

  1. filtrationthe precipitated urea is filtered off with suction
  2. washwashed with 200 ml of dichloromethane
  3. washthe organic phase is washed twice each with 500 ml of 2 M hydrochloric acid and water
  4. concentrationThe organic phase is concentrated
  5. distillationdistilled

Quellen und Nachweise

ORD-Eintrag
ord-b21a3f78409b4b97a18674c91ff231f6
Quelldatensatz
uspto-grants-2001_06
Patentnummer
US06245775B1

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