Methyl morpholine oxide → 4-(5-(4-(2-(S)-Butoxy)-3-trifluoromethylphenyl)-1,2,4-oxadiazol-3-yl)benzaldehyde

Participants

Reaction Steps

A mixture of 510 mg (1.3 mmol) of 4-(5-(4-(2-(S)-methylpropyloxy)-3-trifluoromethylphenyl)-1,2,4-oxadiazol-3-yl)phenylmethanol (from Step C), 153 mg (1.3 mmol) of 4-methylmorpholine N-oxide and 510 mg of 4 A molecular sieves in 8 mL of CH3CN was treated with 13 mg (0.04 mmol) of tetrapropylammonium perruthnate and the resulting mixture was stirred ar rt for 2 h. The solids were filtered and the filtrate was concentrated. Chromatography on a Biotage 40 S cartridge using 9:1 v/v hexanes/EtOAc (1 L) as the eluant afforded 330 mg of the title compound: 1H NMR (500 Mhz) δ 1.01 (t, J=7.3, 3H), 1.38 (d, J=5.9, 3H), 1.73–1.83 (m, 2H), 4.56 (sextet, 1H), 7.14 (d, J=8.9, 1H), 8.02 (d, J=8.2, 2H), 8.30 (d, J=8.2, 2H), 8.32 (d, J=8.9, 1H), 8.44 (s, 1H), 10.1 (s, 1H).

Provenance & Evidence