反应详情

Cs2CO3 (2.34 g, 7.18 mmol) was added to a solution of (tetrahydro-2H-pyran-4-yl)methyl methanesulfonate (1.05 g, 5.41 mmol) and Intermediate I (1.13 g, 4.23 mmol) in anhydrous DMF (11 mL) and the reaction mixture was heated at +70° C. under Ar for 22 hrs. Aqueous NH4Cl (25%) was added and the reaction mixture was extracted with MTBE twice. Combined organic layers were washed with brine, concentrated under reduced pressure. Purification by flash chromatography (25%-100% EtOAc-hexanes gradient) gave (R)-tert-butyl (3-hydroxy-3-(3-((tetrahydro-2H-pyran-4-yl)methoxy)phenyl)propyl)carbamate as a colorless oil. Yield (0.47 g, 30%); 1H NMR (400 MHz, DMSO-d6) δ 7.18 (t, J=8.0 Hz, 1H), 6.85-6.84 (m, 2H), 6.76-6.74 (m, 2H), 5.15 (d, J=4.4 Hz, 1H), 4.49 (q, J=4.4 Hz, 1H), 3.88-3.84 (m, 2H), 3.79 (d, J=6.4 Hz, 2H), 2.94 (q, J=6.4 Hz, 2H), 1.70-1.62 (m, 4H), 1.38-1.26 (m, 11H).

1. temperaturethe reaction mixture was heated at +70° C. under Ar for 22 hrs
2. extractionthe reaction mixture was extracted with MTBE twice
3. washCombined organic layers were washed with brine
4. concentrationconcentrated under reduced pressure
5. customPurification by flash chromatography (25%-100% EtOAc-hexanes gradient)