Phenylacetyl chloride → N-{(3R*,4S*)-1-Benzyl4-[(isopropyl-phenylacetyl-amino)-methyl]-pyrrolidin-3-ylmethyl}-N-isopropyl-4-methoxy-3-(3-methoxy-propoxy)-benzamide

Participants

Reaction Steps

To a solution of N-[(3R*,4R*)-1-benzyl-4-(isopropylamino-methyl)-pyrrolidin-3-ylmethyl]-N-isopropyl-4-methoxy-3-(3-methoxy-propoxy)-benzamide (0.19 g, 0.36 mmol), triethyl-amine (0.15 mL, 1.09 mmol), and DMAP (0.013 g, 0.11 mmol) in CH2Cl2, is added dropwise phenyl-acetyl chloride (0.058 mL, 0.44 mmol) at 0° C. under a nitrogen atmosphere. The solution is stirred overnight at room temperature. The mixture is added an aqueous solution of NaOH 0.1N (50 mL) and CH2Cl2 (50 mL). The organic layer is separated and the aqueous phase extracted twice with CH2Cl2, dried over MgSO4, filtered, and concentrated in vacuo. The crude product is purified by flash chromatography on silica gel (eluent: CH2Cl2/MeOH 90:10) to give the title product. TLC, Rf (CH2Cl2/MeOH 9:1)=0.23. MS (LC-MS): [M+H]+; 644.4 tR (HPLC, C18 column, 10-100% CH3CN/H2O/5 min, 100% CH3CN/2.5 min, CH3CN and H2O containing 0.1% TFA, flow: 1.5 mL/min): 5.95 min.

Provenance & Evidence