Reaktion #450919

Reaktionsgleichung

valinol

triethylamine

benzyl chloroformate

→

N-benzyloxycarbonyl-valinol

Ausbeute 95.6%

Lösungsmittel

methylene chloride

methylene chloride

Reaktionsbedingungen

Aufarbeitung

1. 1
   Waschenwashed with 1N HCl (2X), brine
2. 2
   Trocknendried with anhydrous magnesium sulfate
3. 3
   FiltrationThe resulting mixture was filtered
4. 4
   Sonstigeevaporated

Vorschrift

To a stirred solution of valinol (13.96 g, 0.14 mol) and triethylamine (18.87 mL, 0.14 mol) in 250 mL of dry methylene chloride cooled to 0° C. under a nitrogen atmosphere was added 19.3 mL (0.14 mol) of benzyl chloroformate dropwise over 20 min. After warming to RT overnight, the mixture was diluted with methylene chloride (100 mL) and washed with 1N HCl (2X), brine and dried with anhydrous magnesium sulfate. The resulting mixture was filtered and evaporated to give 30.70 g (95.6%) of N-benzyloxycarbonyl-valinol as a white solid: Rf =0.27 (silica gel; 1:1 hexane:ethyl acetate). Used without further purification.

Quelle