(Diethylamino)sulfur trifluoride → HCID 66839578, compound

Participants

Reaction Conditions

Reaction Steps

{2-{2-{(E)-2-[6-methoxy-5-(4-methyl-1H-imidazol-1-yl)pyridin-2-yl]vinyl}-5,6,7,8-tetrahydro-[1,2,4]triazolo[1,5-a]pyridin-8-yl}phenyl}methanol (350 mg) was dissolved in dichloromethane (40 mL). This was added dropwise to a solution of DAST (1.04 mL) in dichloromethane (6 mL) cooled to −78° C., and the reaction solution was stirred for one hour. Saturated sodium bicarbonate water was added to the reaction solution, followed by extraction with dichloromethane. The organic layer was dried over magnesium sulfate and concentrated under reduced pressure. The resulting residue was purified by silica gel chromatography (carrier: NH silica, elution solvent: ethyl acetate:methanol=9:1) to obtain a racemate of the title compound (70 mg). The resulting racemate was separated by CHIRALPAK™ IB manufactured by Daicel Chemical Industries, Ltd. (2 cm×25 cm, mobile phase: ethanol, flow rate: 10 mL/min) to obtain the title optically active compound with a retention time of 7 minutes and positive optical rotation (20 mg) and the title optically active compound with a retention time of 9 minutes and negative optical rotation (20 mg), where the retention time is an analysis result in CHIRALPAK™ IB manufactured by Daicel Chemical Industries, Ltd. (Lot. IB00CD-FD026, mobile phase: ethanol, flow rate: 0.5 mL/min).

Provenance & Evidence