(Diethylamino)sulfur trifluoride → 5-(1-fluorocyclobutyl)-N-[2-(5-methyl-1,2,4-oxadiazol-3-yl)-1-methylsulfonylpropan-2-yl]-4-[(2S)-1,1,1-trifluoropropan-2-yl]oxypyridine-2-carboxamide

Participants

Reaction Conditions

Reaction Steps

To a solution of 5-(1-hydroxycyclobutyl)-N-[2-(5-methyl-1,2,4-oxadiazol-3-yl)-1-methylsulfonylpropan-2-yl]-4-[(2S)-1,1,1-trifluoropropan-2-yl]oxypyridine-2-carboxamide (example 126e, 21 mg, 41.5 μmol) in dry dichloromethane (200 μl) under an argon atmosphere cooled down to 0° C. was added DAST (10.0 mg, 8.22 μl, 62.2 μmol). The reaction mixture was stirred at 0° C. for 1 h and quenched by addition of a 2M aqueous solution of sodium carbonate. The bi-phasic mixture was stirred for 15 minutes and the organic phase was collected. The organic phase was evaporated down to dryness and the crude material was purified by preparative HPLC to yield the title compound (9.2 mg, 44%). MS (ESI, m/z): 509.5 (M+H+).

Provenance & Evidence