Reaktion #162121

Reaktionsgleichung

(3S)-3-[(2-chloro-5-fluoro-pyrimidin-4-yl)amino]cyclohexanol

Dess-Martin reagent

→

29b

Ausbeute 93.0%

(S)-3-(2-chloro-5-fluoropyrimidin-4-ylamino)cyclohexanone

Ausbeute 93.0%

Lösungsmittel

CH2Cl2

DCM

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigereaction
2. 2
   FiltrationThe reaction mixture was filtered through a pad of celite
3. 3
   Waschenthe resulting filtrate was washed with 200 mL of aqueous saturated NaHCO3 solution and 200 mL brine
4. 4
   TrocknenThe organic phase was dried with MgSO4
5. 5
   Filtrationfiltered
6. 6
   Sonstigethe solvent was removed under reduced pressure
7. 7
   SonstigeThe product was purified by silica gel chromatography (50% EtOAc/hexanes)

Vorschrift

To 700 ml DCM solution of 7.9 g (32.16 mmol) (3S)-3-[(2-chloro-5-fluoro-pyrimidin-4-yl)amino]cyclohexanol, 29a, (7.90 g, 32.16 mmol) in CH2Cl2 (700 mL) was added Dess-Martin reagent (17.73 g, 41.81 mmol). The reaction mixture was stirred at room temperature for 20 hours until TLC chromatography indicated reaction was complete. The reaction mixture was filtered through a pad of celite, and the resulting filtrate was washed with 200 mL of aqueous saturated NaHCO3 solution and 200 mL brine. The organic phase was dried with MgSO4, filtered and the solvent was removed under reduced pressure. The product was purified by silica gel chromatography (50% EtOAc/hexanes) to afford 7.3 g of the desired product, 29b (93% yield).

Quelle