Hydrochloric Acid → (2S,3R,4R,5S,6R)-2-[4-chloro-3-(spiro[3,4-dihydro-1,4-benzoxazine-2,1'-cyclopropane]-6-ylmethyl)phenyl]-6-(hydroxymethyl)tetrahydropyran-3,4,5-triol

Participants

Reaction Steps

To a solution of (2S,3R,4R,5S,6R)-2-[3-[(4-benzylspiro[3H-1,4-benzoxazine-2,1′-cyclopropane]-6-yl)methyl]-4-chloro-phenyl]-6-(hydroxymethyl)tetrahydropyran-3,4,5-triol (300 mg) in methanol (3 mL), was added ethyl acetate (0.5 mL), 10% palladium on charcoal (40 mg), and 0.3 mL conc. HCl. The reaction mixture was stirred under hydrogen balloon pressure for 2 h then filtered through a celite bed which was washed with methanol, and the resulting filtrate was concentrated to a residue which was purified by preparative HPLC to furnish (2S,3R,4R,5S,6R)-2-[4-chloro-3-(spiro[3,4-dihydro-1,4-benzoxazine-2,1′-cyclopropane]-6-ylmethyl)phenyl]-6-(hydroxymethyl)tetrahydropyran-3,4,5-triol (56 mg).

Provenance & Evidence