Sodium Chloride → HCID 57261052, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 1-allyloxycarbonyl-2-(2-methyl-3-oxo-1-butenyl)piperidine (9.9 g), (3R,4R)-4-acetoxy-3-[(1R)-1-t-butyldimethylsilyloxyethyl]-2-oxoazetidine (17.0 g) and triethylamine (16.5 ml) in dichloromethane (100 ml) was added trimethylsilyl trifluoromethanesulfonate (28.6 ml at -15° C. After stirring at 0° C. for 2 hours, the reaction mixture was taken up into a mixture of ethyl acetate (200 ml) and water (200 ml). The mixture was stirred for 2 hours at ambient temperature. After addition of sodium chloride (40 g), the organic layer was separated, washed with saturated sodium hydrogen carbonate and brine, dried over magnesium sulfate and evaporated. The residue was chromatographed on silica gel (300 ml) eluting with a mixture of n-hexane and ethyl acetate (5:1-7:3, V/V) to give (3S,4R)-4-[4-(1-allyloxycarbonylpiperidin-2-yl)-3-methyl-2-oxo-3-butenyl]-3-[(1R)-1-t-butyldimethylsilyloxyethyl]-2-oxoazetidine (13.48 g).

Provenance & Evidence