Diisopropylethylamine → 4-{[(4-Chloro-benzenesulfonyl)-((R)-5,5-difluoro-2-oxo-azepan-3-yl)-amino]-methyl}-3-fluoro-N-pyrrolidin-1-yl-benzamide

Participants

Reaction Steps

4-{[(4-Chloro-benzenesulfonyl)-((R)-5,5-difluoro-2-oxo-azepan-3-yl)-amino]-methyl}-3-fluoro-benzoic acid (50 mg, 0.10 mmol) was dissolved in DMF (1 ml) and activated with the coupling reagent TPTU (33 mg, 0.11 mmol) and Hünig's base (0.03 ml, 0.26 mmol) for 2 min. 1-Aminopyrrolidine hydrochloride (0.013 g, 0.22 mmol) and further Hünig's base (0.03 ml, 0.26 mmol were added. After 1 h the reaction mixture was concentrated under reduced pressure and the residue taken up in ethyl acetate and washed with 5% KHSO4/10% K2SO4 (2×), water, brine, dried (MgSO4), filtered, concentrated under reduced pressure and purified over silica gel (ethyl acetate->ethyl acetate/5% MeOH) and the purified product was lyophilized: white lyophilisate 32 mg;

Provenance & Evidence