反应详情

Alanine methyl ester hydrochloride (7.0 g, 50.0 mmol) is dissolved in methylene chloride (100.0 mL) and triethylamine (20.0 mL, 143.0 mmol). To this solution is added 4-methoxybenzenesulfonyl chloride (10.3 g, 50.0 mmol), and the reaction is stirred at room temperature briefly. The reaction is made basic with 1N sodium hydroxide, and washed with methylene chloride. The combined organic layers are dried (Na2SO4), and the solvent is evaporated. Hexane is added to the residue and the precipitate is collected to give N-[4-methoxybenzenesulfonyl]-alanine methyl ester.

1. washwashed with methylene chloride
2. dry with materialThe combined organic layers are dried (Na2SO4)
3. customthe solvent is evaporated
4. additionHexane is added to the residue
5. customthe precipitate is collected