Citric Acid → HCID 67999477, compound

Participants

Reaction Steps

A mixture of N—((S)-2-((3S,5R,6S)-3-allyl-5-(3-chlorophenyl)-6-(4-chlorophenyl)-3-methyl-2-oxopiperidin-1-yl)-3-methylbutyl)-N-methylcyclopropanesulfonamide (Example 295, Step A, 112.5 mg, 0.195 mmol), sodium periodate (170 mg, 0.795 mmol), and ruthenium(III) chloride hydrate (6 mg, 0.023 mmol) in acetonitrile (1.0 mL), carbon tetrachloride (1.0 mL), and water (1.5 mL) was vigorously stirred at ambient temperature overnight. The reaction mixture was acidified with aqueous citric acid (10% by weight), diluted in ethyl acetate, and filtered through a pad of Celite® (J.T. Baker, Phillipsberg, N.J., diatomaceous earth). The filtrate was partitioned between 2 M aqueous HCl and ethyl acetate. Combined organics were washed with brine, dried over sodium sulfate, filtered, and concentrated in vacuo to a residue that was purified by preparative HPLC (Sunfire™ Prep C18 OBD 10 μm column, 30×150 mm, Waters, Milford, Mass.) eluting with a gradient of 50 to 100% acetonitrile in water (0.1% trifluoroacetic acid in both solvents). Chromatography fractions containing the product were stripped of volatiles, redissolved in minimal volumes of acetonitrile and water, frozen, and lyophilized to give the product as a white solid.

Provenance & Evidence