Hydrochloric Acid → HCID 86586775, compound

Participants

Reaction Steps

A mixture of (1R*,2R*,5S*,6S*)-8-benzyl-2-{[3,5-bis(trifluoromethyl)phenyl]-methoxy}-6-fluoro-6-[1-(2-methoxyethoxymethyl)-1H-tetrazol-5-yl]-1-phenyl-8-azabicyclo[3.2.1]octane (Example 172; 150 mg, 0.22 mmol), 1M solution of hydrogen chloride in ether (3 ml) and methanol (3 ml) was stirred at reflux for 9 hours. The reaction mixture was concentrated. The residue (170 mg) was treated with dichloromethane (3 ml), methanol (0.5 ml), triphenylphosphine (220 mg, 0.83 mmol) and diethyl azodicarboxylate (0.12 ml, 0.56 mmol). The reaction mixture was stirred at room temperature for 1 hour and concentrated in vacuo to give a 1:3.3 mixture of isomers A and B, respectively. Both isomers were separated by chromatography on silica gel (iso-hexane:ethyl acetate 0-20%).

Provenance & Evidence