反应详情

9.32 ml (123 mmol) of MOMCl was added to a solution of 25 ml (144 mmol) of N,N-diisopropylethylamine and 6.00 g (20.5mmol) of (2R, 4R)-(+)-2-(ethoxycarbonyl)-4-hydroxy-1-(4-methoxyphenethyl) pyrrolidine in dichloromethane (100 ml) and the mixture was stirred for 14 hours at room temperature. The mixture was washed with saturated aqueous sodium carbonate and saturated aqueous sodium chloride, dried over anhydrous sodium sulfate, and concentrated in vacuo. The residue was purified by silicagel column chromatography (ethyl acetate:n-hexane=1:1) to give 6.20 g of (2R, 4R)-(+)-2-(ethoxycarbonyl)-4-(methoxymethoxy)-1-(4-methoxyphenethyl)pyrrolidine in 89.8% yield.

1. washThe mixture was washed with saturated aqueous sodium carbonate and saturated aqueous sodium chloride
2. dry with materialdried over anhydrous sodium sulfate
3. concentrationconcentrated in vacuo
4. customThe residue was purified by silicagel column chromatography (ethyl acetate:n-hexane=1:1)