反应详情

To a suspension of tert-butyl (3-(aminomethyl)-1,5-dimethoxypentan-3-yl)carbamate (G21, 275 mg) and sodium hydrogencarbonate (400 mg) in 1,4-dioxane (4 mL) and water (4 mL), 9-fluorenylmethyl succinimidyl carbonate (261 mg) was added under ice cooling, and the mixture was stirred at the same temperature for 2 hours, and then stirred at room temperature for 1 hour. To the reaction mixture, ethyl acetate and saturated aqueous sodium chloride were added. The organic layer was separated, and dried over anhydrous sodium sulfate, and the solvent was evaporated under reduced pressure. The obtained residue was purified by silica gel column chromatography (eluent, 100 to 30% hexane in ethyl acetate) to obtain (9H-fluoren-9-yl)methyl tert-butyl (4-methoxy-2-(2-methoxyethyl)butane-1,2-diyl)dicarbamate (G22, 269 mg).

1. additionwas added under ice cooling
2. stirringstirred at room temperature for 1 hour
3. customThe organic layer was separated
4. dry with materialdried over anhydrous sodium sulfate
5. customthe solvent was evaporated under reduced pressure
6. customThe obtained residue was purified by silica gel column chromatography (eluent, 100 to 30% hexane in ethyl acetate)