反应详情

To a solution of 1-(1-hydroxypropan-2-yl)-2-methyl-4-(trifluoromethyl)-1H-indole-5-carbonitrile (Example 7) (0.110 g, 0.390 mmol) and Et3N (0.068 mL, 0.487 mmol) in CH2Cl2 (4 mL) was added methanesulfonyl chloride (0.038 mL, 0.487 mmol) dropwise. After stirring at rt for 2 h, the reaction mixture was concentrated to dryness. The residue was partitioned between EtOAc (30 mL) and 0.2N HCl (15 mL). The organic phase was washed with water and brine, dried over Na2SO4, filtered and concentrated. The residue was chromatographed over silica gel using a 25-60% EtOAc-hexane gradient to give 2-(5-cyano-2-methyl-4-(trifluoromethyl)-1H-indol-1-yl)propyl methanesulfonate (0.145 g, 97% yield) as a colorless oil: MS (ESI): m/z 361 (MH+).

1. concentrationthe reaction mixture was concentrated to dryness
2. customThe residue was partitioned between EtOAc (30 mL) and 0.2N HCl (15 mL)
3. washThe organic phase was washed with water and brine
4. dry with materialdried over Na2SO4
5. filtrationfiltered
6. concentrationconcentrated
7. customThe residue was chromatographed over silica gel using a 25-60% EtOAc-hexane gradient