Diisopropylethylamine → Biphenyl-2-ylcarbamic Acid 1-[2-({3-[4-(2-{Benzyl-[(R)-2-(8-benzyloxy-2-oxo-1,2-dihydroquinolin-5-yl)-2-(tert-butyldimethylsilanyloxy)ethyl]-amino}ethyl)phenylcarbamoyl]phenyl}methylcarbamoyl)ethyl]piperidin-4-yl Ester

Participants

Reaction Steps

A mixture of 5-[(R)-2-{[2-(4-aminophenyl)ethyl]benzylamino}-1-(tert-butyldimethylsilanyloxy)ethyl]-8-benzyloxy-1H-quinolin-2-one (1.27 g, 2.00 mmol); 3-({3-[4-(biphenyl-2-ylcarbamoyloxy)piperidin-1-yl]propionyl}methylamino)benzoic acid (1.00 g, 2.00 mmol); 1-hydroxy-7-azabenzotriazole (0.286 g, 2.10 mmol) and N,N-diisopropylethylamine (0.697 mL, 4.00 mmol) in DCM (5.00 mL) was stirred for 30 min at room temperature. N-(3-Dimethylaminopropyl)-N-ethylcarbodiimide hydrochloride (0.575 g, 3.00 mmol) was added and the resulting mixture was stirred for 3 h. Saturated aqueous sodium bicarbonate solution (5 mL) was added and this mixture was extracted with DCM (2×5 mL). The combined organic layers were dried over sodium sulfate, filtered and concentrated under reduced pressure. The residue was purified by silica gel flash chromatography (0-10% MeOH in DCM) to give the title compound (1.74 g, 77% yield) as a yellow solid.

Provenance & Evidence