Ethyl Acetate → HCID 11578234, compound

Participants

Reaction Steps

To a solution of (S)-5-[(3,5-Bis-trifluoromethyl-benzyl)-(2-methyl-2H-tetrazol-5-yl)-amino]-7-methyl-8-trifluoromethyl-2,3,4,5-tetrahydro-benzo[b]azepine-1-carbonyl chloride (0.08 mmol) in dimethylformamide (3 mL), add (2-Hydroxy-ethyl)-carbamic acid tert-butyl ester (0.24 mmol) and dimethylaminopyridine (0.08 mmol). Next, add sodium hydride (0.24 mmol) and stir at room temperature for 0.5 h. Quench the reaction with water (15 mL) and dilute with ethyl acetate (10 mL). Separate the organic phase and wash the aqueous with ethyl acetate (2×10 mL). Dry the combined organics over sodium sulfate, filter, and remove solvent under vacuum. Dissolve the crude 5-[(3,5-Bis-trifluoromethyl-benzyl)-(2-methyl-2H-tetrazol-5-yl)-amino]-7-methyl-8-trifluoromethyl-2,3,4,5-tetrahydro-benzo[b]azepine-1-carboxylic acid 2-tert-butoxycarbonylamino-ethyl ester intermediate in dichloromethane (5 mL) and add trifluoroacetic acid (2 mL). After stirring for 1 h, quench the reaction with concentrated sodium carbonate (5 mL). Dilute the reaction with dichloromethane (10 mL) and water (10 mL). Separate the organic phase and wash the aqueous with dichloromethane (2×10 mL). Dry the combined organics over sodium sulfate, filter, and remove the solvent under vacuum. Chromatograph the product over silica gel, eluting with methanol/dichloromethane (0-5%), to afford the title compound as a colorless foam. MS (ES+): 640 (M+H).

Provenance & Evidence