反应详情

A solution of (S)-N-hydroxy-2,2-dimethyl-1,3-dioxolane-4-carbimidoyl chloride (9.88 g, 55.01 mmol) in THF (200 mL) at 0° C. was added methanesulfonyl chloride (4.703 ml, 60.51 mmol), followed by N,N-diisopropylethylamine (10.54 ml, 60.51 mmol) and the reaction was stirred for 1 hour at ambient temperature, filtered and concentrated in vacuo. The residue was purified over silica gel (25 to 100% ethyl acetate in hexanes) to afford (S)-2,2-dimethyl-N-(methylsulfonyloxy)-1,3-dioxolane-4-carbimidoyl chloride (12.28 g, 47.65 mmol, 86.63% yield) as colorless oil.

1. filtrationfiltered
2. concentrationconcentrated in vacuo
3. customThe residue was purified over silica gel (25 to 100% ethyl acetate in hexanes)