Pyridine → HCID 16749201, compound

Participants

Reaction Steps

A solution of tert-butyl (3R)-3-{[({(Z)-amino[1-(methylsulfonyl)-4-piperidinyl]methylidene}amino)oxy]carbonyl}-6-cyclohexylhexanoate (preparation 42) (1.50 g, 1.83 mmol) in toluene (100 ml) was treated with pyridine (90 μl, 1.83 mmol) and anhydrous ZnCl2 (150 mg, 1.83 mmol) and heated at reflux for 20 hours. The reaction mixture was diluted with EtOAc and washed with H2O, brine and H2O, dried over anhydrous Na2SO4 and filtered. The solvent was removed under reduced pressure. The residue was purified on a silica column eluting with a solvent gradient of cyclohexane:EtOAc (90:10) gradually changing to (50:50). The oil was recrystallised from pentane to afford the title compound as a white solid (320 mg, 36%).

Provenance & Evidence