Water → HCID 67704267, compound

Participants

Reaction Conditions

Reaction Steps

Osmium tetraoxide (4% wt/wt in water, 231.78 mL, 241.05 g, 37.93 mmol,) is added at 23° C. to a solution of N-methylmorpholine-N-oxide hydrate (101.62 mL; 114.83 g, 424.78 mmol), N-methylmorpholine-N-oxide hydrate (116.88 g, 864.74 mmol), 4-methylmorpholine-4-oxide (198.88 mL; 195.50 g, 1.67 mol), and di-tert-butyl (1S,2S,5R,6S)-2-[(tert-butoxycarbonyl)amino]bicyclo[3.1.0]hex-3-ene-2,6-dicarboxylate (600.00 g, 1.52 mol) in acetone (12.00 L) and water (1.80 L). The mixture is stirred at 23° C. overnight. Thin layer chromatograph (hexane/ethyl acetate 3:2; stain: PMA) analysis of the reaction mixture revealed complete consumption of di-tert-butyl (1S,2S,5R,6S)-2-[(tert-butoxycarbonyl)amino]bicyclo[3.1.0]hex-3-ene-2,6-dicarboxylate. The reaction is quenched with saturated aqueous Na2S2O3 (1 L) and extracted with methyl tert-butyl ether (15 L). The organic phase is washed with an aqueous solution (1.5 L) prepared from 37% aqueous HCl (300 mL) and brine (1.2 L), dried with anhydrous MgSO4, filtered, and concentrated in vacuo. The residue is slurried in heptane (1.5 L), filtered, washed with heptane (2×500 mL), and resulting solid. The solid is dried under vacuum to yield the title compound (450 g, 69% yield).

Provenance & Evidence