反应详情

To a suspension of benzyl[(trans-4-{[(3-chloropyrazin-2-yl)methyl]carbamoyl}cyclohexyl)methyl]carbamate (0.100 g, 0.220 mmol) in EtOAc (0.9 mL) and DMF (0.068 mL) at 0° C. was added slowly POCl3 (0.082 mL, 0.88 mmol). After stirring at rt for an hour, the mixture was cooled to 0° C. and solid NaHCO3 was added. After a further 10 min at 0° C. and 20 min at rt, the mixture was re-cooled to 0° C. and water (20 mL) was added. The reaction mixture was extracted with EtOAc (3×20 mL) and the extracts washed with water (2×30 mL) and brine (30 mL) and then dried over Na2SO4 and concentrated in vacuo to afford 0.096 g of the title compound. 1H NMR (400 MHz, CDCl3): δ 1.15-1.19 (m, 2H), 1.76-1.87 (m, 3H), 1.93-2.00 (m, 2H), 2.04-2.08 (m, 2H), 3.07 (m, 1H), 3.15 (t, J=6.4 Hz, 2H), 4.84 (br, 1H), 5.09 (s, 2H), 7.31-7.40 (m, 6H), 7.61 (d, J=4.8 Hz, 1H), 7.79 (s, 1H). MS (ES+): m/z 399.26 [MH+].

1. temperaturethe mixture was cooled to 0° C.
2. temperature20 min at rt, the mixture was re-cooled to 0° C.
3. extractionThe reaction mixture was extracted with EtOAc (3×20 mL)
4. washthe extracts washed with water (2×30 mL) and brine (30 mL)
5. dry with materialdried over Na2SO4
6. concentrationconcentrated in vacuo