Methanol → HCID 57974070, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of benzyl [(3R)-3-(3,5-difluorophenyl)-5-oxothiomorpholin-4-yl]acetate (151 mg, 0.399 mmol, from Step A.) in MeOH (10 mL) was added aqueous hydrogen peroxide (30 drops, ˜0.8 mL, 30% by weight), and aqueous HCl (5 drops, 3 M HCl). This mixture was then heated to 40° C. for 2.5 hours. After cooling to ambient temperature, the bulk of the MeOH was removed in vacuo, and the residue was partitioned between 50 mL of water and 100 mL of diethyl ether. The organics were washed with saturated brine, then dried over sodium sulfate, filtered, and concentrated in vacuo to give a residue that was purified by silica gel chromatography eluting with a gradient of Hexanes:EtOAc—1:1 to 100% EtOAc, to yield 24.5 mg of the minor sulfoxide isomer and 93.6 mg of the major sulfoxide isomer. MS: m/z=394 (M+1).

Provenance & Evidence