反应详情

温度

60 °C

N-Carbobenzyloxy-β-chloro-L-alanine (0.091 g, 0.35 mmol) was dissolved in 0.45 ml of water and, then, 0.065 g (0.77 mmol) of sodium hydrogen carbonate was added. Thereafter, 0.046 g (0.42 mmol) of thiophenol was added dropwise at room temperature in a nitrogen gas atmosphere. After 2 hours of stirring at 60° C., the reaction mixture was cooled with ice and acidified with 1 N hydrochloric acid, and then extracted with ethyl acetate. The solvent was distilled off and the residue was purified by column chromatography to give 0.097 g (0.29mmol, 84%) of N-carbobenzyloxy-S-phenyl-L-cysteine. The product obtained had an optical purity of not less than 98% e.e. as determined by HPLC analysis following the same procedure as in Example 13.

1. temperaturethe reaction mixture was cooled with ice
2. extractionextracted with ethyl acetate
3. distillationThe solvent was distilled off
4. customthe residue was purified by column chromatography