Hydrochloric Acid → HCID 86731288, compound

Participants

Reaction Conditions

Reaction Steps

To 2-(3-chloro-4-(cyclopropylmethoxy)phenyl)-6,7-dihydro-4H-spiro[1,3-benzoxazole-5,2′-[1,3]dioxolane] (12.5 g) in a mixed solvent of THF (60 mL)-methanol (30 mL)-water (30 mL) was added 6 M hydrochloric acid (34.5 mL), and the mixture was stirred at 70° C. for 1 hr. The reaction mixture was neutralized with saturated aqueous sodium hydrogen carbonate solution, and the mixture was extracted with ethyl acetate. To the organic layer was added sodium tetrahydroborate (1.31 g), and the mixture was stirred at room temperature for 20 min. To the reaction mixture was added saturated aqueous ammonium chloride solution, and the mixture was extracted with ethyl acetate. The organic layer was dried over anhydrous magnesium sulfate, and the solvent was evaporated under reduced pressure. The obtained residue was purified by silica gel column chromatography (hexane/ethyl acetate) to give the title compound (5.63 g).

Provenance & Evidence