Acetic Acid → HCID 59432385, compound

Participants

Reaction Steps

Add sodium triacetoxyborohydride (0.374 g, 1.76 mmol) portionwise to a solution of (S)-(3,5-bistrifluoromethylbenzyl)-(7,9-dimethyl-8-trifluoromethyl-2,3,4,5-tetrahydro-1H-benzo[b]azepin-5-yl)-(2-methyl-2H-tetrazol-5-yl)-amine (Example 148, Step 2) (0.250 g, 0.441 mmol), tert-butyl-4-formylpiperidine-1-carboxylate (0.282 g, 1.32 mmol) and glacial acetic acid (0.2 mL) in 1,2-dichloroethane (3 mL) at room temperature under an atmosphere of nitrogen and stir for 24 h. Quench the reaction with saturated sodium bicarbonate (5 mL) and dilute with dichloromethane (15 mL). Separate the layers and wash the organic layer with saturated sodium bicarbonate and brine (20 mL each). Dry the organic layer over sodium sulfate, filter and remove the solvent under reduced pressure. Purify the residue using flash column chromatography on silica gel, eluting with hexanes/ethyl acetate (80:20), to provide the title compound as a white crushable foam (0.272 g, 81%). 1H NMR (CDCl3, 500 MHz) δ 0.87-1.14 (m, 3H), 1.24-1.34 (m, 1H), 1.45 (s, 9H), 1.61-1.97 (m, 7H), 2.30-2.33 (m, 6H), 2.65-2.75 (m, 2H), 2.86-2.89 (m, 2H), 2.95-3.11 (m, 1H), 3.25-3.28 (m, 1H), 4.13 (s, 3H), 4.81-4.88 (m, 1H), 5.21 (br s, 1H), 5.60 (br s, 1H), 6.57 (s, 1H), 7.77 (s, 3H); ESI MS m/z 764 [C35H42F9N7O2+H]+.

Provenance & Evidence