Pyridine → Isopropyl 5-[acetyl-(3,5-bistrifluoromethylbenzyl)amino]-8-methanesulfonylamino-2,3,4,5-tetrahydrobenzo[b]azepine-1-carboxylate

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Reaction Steps

Add methanesulfonyl chloride (13 μl, 0.170 mmol) dropwise to a suspension of isopropyl-5-[acetyl-(3,5-bistrifluoromethylbenzyl)amino]-8-amino-2,3,4,5-tetrahydrobenzo[b]azepine-1-carboxylate (0.082 g, 0.154 mmol) and pyridine (15 μl, 0.185 mmol) in dichloromethane (2 mL) at 0° C. under nitrogen. Stir the orange suspension for 0.5 h, then remove the cooling bath and warm the mixture to room temperature and stir overnight. Dilute the mixture with dichloromethane (30 mL) and wash with 2 N HCl, water and brine (10 mL each), then dry the organic layer over sodium sulfate, filter and remove the solvent under reduced pressure. Purify the residue using chromatography on silica gel, eluting with ethyl acetate/hexanes (70:30), to provide the title compound as a white solid (0.055 g, 58%): ESI MS 610 (M+H).

Provenance & Evidence