反应详情

(RS)-1-[2-(5,6-Difluoro-1H-benzoimidazol-2-ylmethyl)-piperidin-1-yl]-1-[5-(4-fluoro-phenyl)-2-methyl-thiazol-4-yl]-methanone, E35 (400 mg, 0.85 mmol) was slowly added to an ice-cooled slurry of NaH (68 mg, 60% dispersion on mineral oil, 1.7 mmol) in DMF (10 ml). After 0.5 h iodomethane (0.90 mmol) was added. The reaction mixture was stirred at room temperature, under argon for 16 h. 2N HCl (9 drops) then water (100 ml) were added. The aqueous phase was extracted with EtOAc (2×) and the combined organics washed with brine, dried (Na2SO4) and the solvent removed in vacuo. The residue was chromatographed (silica gel, 50-100% pentane-ethyl acetate). Residual DMF was removed by dissolving in ethyl acetate/diethyl ether and washing with water (2×). Drying (Na2SO4) and removal of the solvent in vacuo afforded the title compound as a pale yellow solid (142 mg, 34%).

1. extractionThe aqueous phase was extracted with EtOAc (2×)
2. washthe combined organics washed with brine
3. dry with materialdried (Na2SO4)
4. customthe solvent removed in vacuo
5. customThe residue was chromatographed (silica gel, 50-100% pentane-ethyl acetate)
6. customResidual DMF was removed
7. dissolutionby dissolving in ethyl acetate/diethyl ether
8. washwashing with water (2×)
9. customDrying
10. custom(Na2SO4) and removal of the solvent in vacuo