反应详情

In 50 mL of chloroform was dissolved 2.75 g of N-tert-butoxycarbonyl-trans-4-(5-ethoxycarbonyl-2-methylthiopyrimidin-4-yloxy)cyclohexylamine (a compound of Reference Example 9-49 prior to deprotection (hydrochloric acid-dioxane treatment)), 1.73 g of 75%-m-chloroperbenzoic acid was added to the solution, and the mixture was stirred at room temperature for 30 minutes. Then, 1.14 g of dimethylamine hydrochloride and 2.79 mL of triethylamine were added thereto and the mixture was further stirred for 5 hours. An aqueous saturated sodium hydrogencarbonate solution was added to the reaction mixture, and the mixture was stirred. Then, the chloroform layer was collected by separation, dried over anhydrous sodium sulfate and the solvent was removed under reduced pressure. The residue was purified by silica gel flash chromatography (solvent: hexane-chloroform (50:50 to 100:0)) to obtain 2.74 g of N-tert-butoxycarbonyl-trans-4-[5-ethoxycarbonyl-2-(dimethylamino)-pyrimidin- 4-yloxy]cyclohexylamine.

1. stirringthe mixture was further stirred for 5 hours
2. stirringthe mixture was stirred
3. customThen, the chloroform layer was collected by separation
4. dry with materialdried over anhydrous sodium sulfate
5. customthe solvent was removed under reduced pressure
6. customThe residue was purified by silica gel flash chromatography (solvent: hexane-chloroform (50:50 to 100:0))