反应详情

To a solution of 2,8-diaza-spiro[4.5]decane-2-carboxylic acid tert-butyl ester (1.12 g, 4.66 mol) in CH2Cl2 (10 ml), triethylamine (3.88 ml) and methanesulfonyl chloride (1.08 ml, 14 mmol) are added at 0° C. The reaction mixture is stirred for overnight, quenched with ice-water and extracted with dichloromethane. The combined extracts are washed with H2O, brine and dried over sodium sulphate to give crude 8-methane sulfonyl-2,8-diaza-spiro[4.5]decane-2-carboxylic acid tert-butyl ester (1.32 g).

1. customquenched with ice-water
2. extractionextracted with dichloromethane
3. washThe combined extracts are washed with H2O, brine
4. dry with materialdried over sodium sulphate