Réaction #162128

Équation de réaction

(1R,2S,3S)-3-aminocyclohexane-1,2-diol

2,4-dichloro-5-fluoro-pyrimidine

iPr2NEt

→

compound 31b

(1R,2S,3S)-3-(2-chloro-5-fluoropyrimidin-4-ylamino)cyclohexane-1,2-diol

Solvants

acetonitrile

isopropanol

Conditions de réaction

Traitement

1. 1
   AutreThe reaction mixture was sealed
2. 2
   Concentrationconcentrated to dryness
3. 3
   AutreThe crude was purified via silica gel chromatography (40%-100% EtOAc/Hex)
4. 4
   Autreto afford a racemate, which
5. 5
   Autrewas further purified via chiral HPLC separation

Mode opératoire

The starting racemic diol, 31a, (1R,2S,3S)-3-aminocyclohexane-1,2-diol, was prepared following the procedure described in: Org. Bio. Chem. (2008) 6, 3751 and 3762, Davies, et. al. To a solution of racemic diol 31a (0.66 g, 5.00 mmol) in acetonitrile (5 mL) and isopropanol (5 mL) was added 2,4-dichloro-5-fluoro-pyrimidine (0.84 g, 5.03 mmol) and iPr2NEt (3.25 g, 4.38 mL, 25.20 mmol). The reaction mixture was sealed and heated to 100° C. for 90 minutes and then concentrated to dryness. The crude was purified via silica gel chromatography (40%-100% EtOAc/Hex) to afford a racemate, which was further purified via chiral HPLC separation to give compound 31b (0.26 g) as a white solid.

Source