Reaktion #84702

Reaktionsgleichung

ethyl 3-(tert-butoxycarbonylamino)-4-hydroxycyclohexanecarboxylate

triethylamine

methanesulfonyl chloride

→

title compound

Ausbeute 97.7%

ethyl 3-(tert-butoxycarbonylamino)-4-(methylsulfonyloxy)cyclohexanecarboxylate

Ausbeute 97.7%

Lösungsmittel

dichloromethane

Reaktionsbedingungen

Aufarbeitung

1. 1
   WaschenThe solution was washed with water (100 mL×3) and brine
2. 2
   Trocknendried over anhydrous sodium sulfate
3. 3
   Filtrationfiltered
4. 4
   Einengenconcentrated

Vorschrift

To a solution of Racemate-ethyl 3-(tert-butoxycarbonylamino)-4-hydroxycyclohexanecarboxylate (12.0 g, 42 mmol) and triethylamine (12.7 g, 126 mmol) in dichloromethane (150 mL) was added methanesulfonyl chloride (9.5 g, 84 mmol) dropwise at 0° C., and the mixture was stirred at 0° C. for 3 hours. The solution was washed with water (100 mL×3) and brine, dried over anhydrous sodium sulfate, filtered and concentrated to afford the title compound (15 g, crude) as a yellow oil. MS (ES+) C15H27NO7S requires: 365, found: 266 [M+H−100]+.

Quelle