反应详情

To a solution of methyl 2-(2-{[N-tert-butoxycarbonyl-N-(2-hydroxyethyl)amino]methyl}phenyl)-3-cyclohexyl-1H-indole-6-carboxylate (424 mg, 0.830 mmol) and triethylamine (0.14 ml, 1.0 mmol) in chloroform (5.0 ml) was added dropwise methanesulfonyl chloride (0.07 ml, 0.90 mmol) under ice-cooling, and the mixture was stirred at room temperature for 1 hr. 1N Hydrochloric acid was added to the reaction mixture, and the mixture was extracted with chloroform. The organic layer was washed with saturated brine and dried over anhydrous sodium sulfate. After filtration, the solvent was evaporated under reduced pressure to give methyl 2-(2-{[N-tert-butoxycarbonyl-N-(2-methanesulfonyloxyethyl)amino]methyl}phenyl)-3-cyclohexyl-1H-indole-6-carboxylate as a crude product. The obtained crude product was used for Step 5 without purification.

1. temperaturecooling
2. extractionthe mixture was extracted with chloroform
3. washThe organic layer was washed with saturated brine
4. dry with materialdried over anhydrous sodium sulfate
5. filtrationAfter filtration
6. customthe solvent was evaporated under reduced pressure