Sodium Bicarbonate → HCID 90052141, compound

Participants

Reaction Steps

To a solution of (9H-fluoren-9-yl)methyl (2-amino-4-methoxy-2-(2-methoxyethyl)butyl)carbamate (G23, 186 mg) and 4-pentynal (42 mg) in methylene chloride (5 mL), sodium triacetoxyborohydride (247 mg) and acetic acid (26 μL) were added at room temperature, and the mixture was stirred at the same temperature for 3 hours. To the reaction mixture, ethyl acetate and saturated aqueous sodium hydrogencarbonate were added. The organic layer was separated, washed with saturated aqueous sodium chloride, and then dried over anhydrous sodium sulfate, and the solvent was evaporated under reduced pressure. The obtained residue was purified by silica gel column chromatography (eluent, 60 to 0% hexane in ethyl acetate) to obtain (9H-fluoren-9-yl)methyl (4-methoxy-2-(2-methoxyethyl)-2-((4-pentyn-1-yl)amino)butyl)carbamate (G24, 102 mg).

Provenance & Evidence