Pyridine → (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-carboxylic acid ethyl ester

Participants

Reaction Steps

Add ethyl chloroformate (0.0223 mL, 0.233 mmol) dropwise to a solution of (S)-(3,5-bistrifluoromethylbenzyl)-(2-methyl-2H-tetrazol-5-yl)-(7-methyl-8-trifluoromethyl-2,3,4,5-tetrahydro-1H-benzo[b]azepin-5-yl)amine (0.0430 g, 0.0778 mmol) (Example 3, Step 18) and pyridine (0.0190 mL, 0.233 mmol) in dichloromethane (1 mL) at room temperature under an atmosphere of nitrogen and stir for 2 h. Dilute the reaction mixture with ethyl acetate (10 mL) and wash with 1.0 N hydrochloric acid (10 mL) and water (3×10 mL). Dry the organic layer over anhydrous sodium sulfate, filter, and remove the solvent under reduced pressure. Purify the residue using column chromatography on silica gel, eluting with ethyl acetate/hexanes (0-20%), to provide the title compound (0.0320 g, 65%). MS (ES+): 625 (M+H).

Provenance & Evidence