反应详情

A mixture of (2S,3R)-2-amino-3-hydroxy-4-methyl-pentanoic acid methyl ester (0.50 g, 3.4 mmol) and triethylamine (0.69 g, 6.8 mmol) in dichloromethane (10 mL) was added 4-methyl-benzenesulfonyl chloride (0.71 g, 3.7 mmol) at 0° C. After stirring for 2 hours at room temperature, the mixture was washed with water and the organic layer was separated and then dried over sodium sulfate. After removal of solvent, the residue was used in next step without purification. MS: calc'd (MH+) 316, measured (MH+) 316.

1. washthe mixture was washed with water
2. customthe organic layer was separated
3. dry with materialdried over sodium sulfate
4. customAfter removal of solvent
5. customthe residue was used in next step without purification