Benzenesulfonyl chloride → HCID 54038054, compound

Participants

Reaction Steps

γ-Benzyl-L-glutamyl-L-proline benzylester hydrochloride (2.30 g, 5 mmole) was dissolved in methylene chloride (30 ml), and triethylamine (1.11 g, 11 mole) was added thereto at -30 ° C. Methylene chloride (10 ml) solution of benzene sulfonyl chloride (0.86 g, 5 mmole) was added dropwise thereto. The solution was stirred for 1 hour at less than 0° C., and then for 5 hours at room temperature, and methylene chloride (60 ml) was added thereto. The solution was washed with 55 aqueous sodium bicarbonate (100 ml, twice), 1N aqueous hydrochloric acid (100 ml, twice), and water (100 ml) in the order given, and dried over anhydrous magnesium sulfate. The solvent was distilled off under reduced pressure to give N-benzenesulfonyl-γ-benzyl-L-glutamyl-L-proline benzylester (yield: 2.61 g, 92.4%)

Provenance & Evidence