Methyl morpholine oxide → 1-{(E,3S,3aS,7aR)-7-(bromomethylene)-octahydro-3a-methyl-1H-indene-3-yl}ethanone

Participants

Reaction Steps

Under a nitrogen atmosphere, a solution of (S)-1-{(E,3S,3aS,7aR)-7-(bromomethylene)-octahydro-3a-methyl-1H-indene-3-yl}ethanol (Compound 18: 58.1 mg, 0.2127 mmol) and N-methylmorpholine-N-oxide (37.4 mg, 0.3190 mmol) in acetonitrile (2 ml) was cooled in an ice bath, and tetra-n-propylammonium perruthenate (3.7 mg, 0.01064 mmol) was added thereto. The reaction mixture was stirred at the same temperature for 5 minutes, and at room temperature (22° C.) for 50 minutes, and the resulting mixture was diluted with ethyl acetate. The mixture was filtered through Celite, and the solids were washed with ethyl acetate, followed by evaporation of the filtrate under reduced pressure. The obtained crude product was purified by flash column chromatography to obtain 1-{(E,3S,3aS,7aR)-7-(bromomethylene)-octahydro-3a-methyl-1H-indene-3-yl}ethanone (58.2 mg, 100%). The spectrum data thereof agreed with the data described in Example 7.

Provenance & Evidence