Water → HCID 58293392, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of the residue (95.0 g) obtained in (7) in tetrahydrofuran (300 ml) was added benzylamine (34 ml) at room temperature, and the mixture was stirred for 2 hours. The mixture was cooled to 0° C. Then, thereto was added sodium triacetoxyborohydride (83.3 g), and the mixture was stirred at room temperature for 1.5 hours. To the reaction mixture was added water (300 ml), and the mixture was extracted with n-hexane/ethyl acetate (1/3, 600 ml). The separated organic layer was washed with water (300 ml) and saturated aqueous sodium chloride solution (200 ml), and then extracted with 5% aqueous citric acid solution (300 ml, 200 ml) twice and 10% aqueous citric acid solution (250 ml×3) 3 times. The combined aqueous layer was basified by 4M aqueous sodium hydroxide solution to pH 10 and extracted with chloroform (300 ml). The organic layer was washed with saturated aqueous sodium chloride solution (200 ml), dried over anhydrous magnesium sulfate and concentrated under reduced pressure to give the titled compound (46.9 g).

Provenance & Evidence