Reaktion #305606

Reaktionsgleichung

tert-butyl (S)-1-azido-3-((R)-tetrahydro-2H-pyran-3-yl)propan-2-ylcarbamate

LHMDS

MeI

→

tert-butyl (S)-1-azido-3-((R)-tetrahydro-2H-pyran-3-yl)propan-2-yl(methyl)carbamate

Ausbeute 100.0%

Lösungsmittel

THF

THF

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.WAITstand for 12 hr in the refrigerator
2. 2
   SonstigeThe reaction mixture was quenched with saturated aq. NH4Cl
3. 3
   Extraktionextracted with EtOAc (30 mL)
4. 4
   Waschenthe separated organic phase was washed with H2O (2×10 mL), brine
5. 5
   Trocknendried (Na2SO4)
6. 6
   Filtrationfiltered
7. 7
   EinengenThe filtrate was concentrated
8. 8
   Sonstigethe resulting slurry was purified through flash chromatography on silica gel (eluted with gradient system, 0-30% EtOAc in hexane)

Vorschrift

To a solution of tert-butyl (S)-1-azido-3-((R)-tetrahydro-2H-pyran-3-yl)propan-2-ylcarbamate (30 mg, 0.11 mmol) in anhydrous THF (4 mL) at −78° C. was added 1.0 M LHMDS solution in THF (253 μL, 0.25 mmol), then stirred at this temperature for 30 min. To this mixture was added MeI (125 μL, 0.22 mmol), then the temperature was allowed to warm to 0° C., and stand for 12 hr in the refrigerator. The reaction mixture was quenched with saturated aq. NH4Cl, extracted with EtOAc (30 mL), the separated organic phase was washed with H2O (2×10 mL), brine, and dried (Na2SO4), and filtered. The filtrate was concentrated, the resulting slurry was purified through flash chromatography on silica gel (eluted with gradient system, 0-30% EtOAc in hexane) to afford tert-butyl (S)-1-azido-3-((R)-tetrahydro-2H-pyran-3-yl)propan-2-yl(methyl)carbamate 31 mg, yield 100%. MS ESI+ve m/z 321 (M+Na).

Quelle