Reaktion #428043

Reaktionsgleichung

Acetic anhydride

3-methylbutane-1,3-diol

→

3-Hydroxy-3-methylbutyl acetate

Lösungsmittel

methylene chloride

methylene chloride

Reaktionsbedingungen

Aufarbeitung

1. 1
   Waschenthe solution was washed with 10% aqueous ammonium chloride (2×20 mL), 5% sodium carbonate (2×20 mL) and brine (1×20 mL)
2. 2
   Trocknendried over sodium sulfate
3. 3
   Sonstigeevaporated to dryness
4. 4
   Sonstigeto yield a clear, yellow liquid

Vorschrift

A solution of 16 mL 3-methylbutane-1,3-diol in 10 mL methylene chloride with a catalytic amount of 4-dimethylpyridine was cooled to 0° C. Acetic anhydride (4.084 g, 40 mmol) was then added drop wise and the solution was stirred for 5 hours. An additional 10 mL of methylene chloride was added and the solution was washed with 10% aqueous ammonium chloride (2×20 mL), 5% sodium carbonate (2×20 mL) and brine (1×20 mL), dried over sodium sulfate and evaporated to dryness to yield a clear, yellow liquid. (2.402 g) 1H NMR (400 MHz, CDCl3): δ 1.24 (s, 6H), 1.56 (b, 1H), 1.80-1.83 (t, J=6.8, 2H), 2.02 (s, 3H), 4.22 (t, J=6.9, 2H).

Quelle