Potassium Carbonate → (3aRS,6SR,7aSR)-6-acetoxymethyl-2-benzyl-4-perhydroisoindolone

Participants

Reaction Steps

To a solution of 6.5 g of 5-acetoxymethyl-2-cyclohexen-1-one [J. Am. Chem. Soc., 110, 2919 (1988)]and 14 g of N-butoxymethyl-N-trimethylsilylmethylbenzylamine in 60 cm3 of dry dichloromethane are added 2 drops of trifluoroacetic acid. The reaction mixture reaches reflux and is maintained at the same temperature for 30 minutes and is then left at 20° C. for one hour. After addition of 1.0 g of potassium carbonate, the suspension obtained is filtered and the filtrate is concentrated to dryness under reduced pressure (2.7 kPa). The oily residue obtained is chromatographed on a column of silica gel (particle size 0.06-0.2 mm, height 42 cm) in a mixture of cyclohexane and ethyl acetate (40/60 by volume) and then in ethyl acetate. 8.2 g of (3aRS,6SR,7aSR)-6-acetoxymethyl-2-benzyl-4-perhydroisoindolone are obtained in the form of a yellowish oil.

Provenance & Evidence