1,2-Dichloroethane → 3-tert-butoxycarbonyl-7-chloro-6-(3-fluoro-4-isopropylcarbamoyl-benzylamino)-2,3,4,5-tetrahydro-1H-benzo[d]azepine

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Reaction Steps

Add isopropylamine (0.15 mL, 1.8 mmol), HOBT (0.24 g, 1.8 mmol), diisopropylethylamine (0.63 mL, 3.6 mmol) and EDC (0.34 g, 1.8 mmol) to a mixture of 3-tert-butoxycarbonyl-6-(4-carboxy-3-fluoro-benzylamino)-7-chloro-2,3,4,5-tetrahydro-1H-benzo[d]azepine (0.403 g, 0.9 mmol) in anhydrous THF (11.8 mL) at room temperature. Stir overnight at room temperature and partition the mixture between EtOAc (250 mL) and saturated aqueous NaHCO3 (100 mL). Dry the organic phase over Na2SO4, filter and concentrate in vacuo. Purify by chromatography on silica gel (40 g RediSep® column) eluting with hexane/EtOAc (19:1 to 1:1 gradient over 30 min; 50 mL/min) to afford 3-tert-butoxycarbonyl-7-chloro-6-(3-fluoro-4-isopropylcarbamoyl-benzylamino)-2,3,4,5-tetrahydro-1H-benzo[d]azepine as a thick colorless oil (0.439 g, 100%). MS (ES+) m/z: 490.2 (M+H)+.

Provenance & Evidence