反应详情

To a solution of 1-(N-t-butoxycarbonyl-N-methylamino)2-hydroxy-5-methylhexane (2.45 g) and triethylamine (3.03 g) in dimethyl sulfoxide (20 ml) was added sulfur trioxide pyridine complex (4.77 g) under ice-bath cooling. After the mixture was stirred at ambient temperature overnight, the reaction mixture was poured into ice-water (100 ml). The mixture was extracted with diethyl ether (100 ml×2). The extract was washed with water, dried over magnesium sulfate, and concentrated under reduced pressure. The residue was purified with silica gel column chromatography (20% ethyl acetate in n-hexane as eluent) to give 1-(N-t-butoxycarbonyl-N-methylamino)-2-oxo-5-methylhexane (2.15 g).

1. temperaturecooling
2. extractionThe mixture was extracted with diethyl ether (100 ml×2)
3. washThe extract was washed with water
4. dry with materialdried over magnesium sulfate
5. concentrationconcentrated under reduced pressure
6. customThe residue was purified with silica gel column chromatography (20% ethyl acetate in n-hexane as eluent)