3-phenylpropane-1-sulfonyl chloride

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Analogously, (2S,4R)-4-(2-[[4-(4-Methoxy-benzylsulfanyl)-pyrrolidine-2-carbonyl]-methyl-amino]-acetylamino)-benzoic acid ethyl ester was treated with 3-Phenyl-propane-1-sulfonyl chloride folowed by deprotection according to 8.1. to give (2S,4R)-4-[2-[[4-Mercapto-1-(3-phenyl-propane-1-sulfonyl)-pyrrolidine-2-carbonyl]-methyl-amino]-acetylamino]-benzoic acid ethyl ester as colorless foam MS: 548 (MH+).