Phosgene → 5-[Acetyl-(3,5-bis-trifluoromethyl-benzyl)-amino]-8-chloro-2,3,4,5-tetrahydro-benzo[b]azepine-1-carbonyl chloride

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Reaction Steps

Add phosgene (1.1 mmol, 1.93 M solution in toluene) followed by diisopropyl ethylamine (1.1 mmol) to a toluene (15 mL) solution of N-(3,5-Bis-trifluoromethyl-benzyl)-N-(8-chloro-2,3,4,5-tetrahydro-1H-benzo[b]azepin-5-yl)-acetamide (0.50 g, 1.1 mmol) under nitrogen. After stirring at room temperature for 1 h, remove solvent under vacuum. Chromatograph the crude product over silica gel using ethyl acetate/hexane (10-30%) to elute. This provides the title compound (0.55 g, 96%) as an oil which solidifies upon standing: MS (ES+): 527 (M+H).

Provenance & Evidence