Sodium Chloride → HCID 10387945, compound

Participants

Reaction Steps

After 1.33 g of 2-carboxy-6,11-dihydro-N-(2,6-diisopropylphenyl)dibenz[b,e]oxepin-11-carboxamide (Compound 25) obtained in Example 25 was dissolved in 10 ml of tetrahydrofuran, 1.0 ml of triethylamine and 0.39 g of ethyl chloroformate were added to the solution under ice cooling. The mixture was stirred at room temperature for 12 hours. Then 0.57 g of sodium borohydride was slowly added to the reaction mixture under ice cooling. After stirring at room temperature for 6 hours, saturated aqueous sodium chloride solution was added and the mixture was extracted with ethyl acetate. After drying over anhydrous magnesium sulfate, the organic layer was concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography [eluent: hexane-ethyl acetate (2:1)]. The crude crystal was recrystallized from ethyl acetate-hexane to obtain 1.08 g of Compound 26 as white needles.

Provenance & Evidence