(Diethylamino)sulfur trifluoride → HCID 118207321, compound

Participants

Reaction Steps

To a solution of 1-(3-fluoro-4-methylbenzyl)-3-((3R,4R)-3-hydroxy-4-(4-hydroxyphenyl)-piperidin-1-yl)pyrrolidin-2-one (from step F, 1.9 g, 4.8 mmol) in DCM (35 mL) at 0° C. was added DAST (3.2 mL, 23.8 mmol) under nitrogen. The reaction mixture was allowed to warm to rt and stirred for 2 h, and then diluted with saturated bicarbonate solution and extracted with 200 mL of DCM. The organic layer was dried over Na2SO4, filtered, and evaporated under reduced pressure to give a crude product which was purified via preparative HPLC (method J) to yield 3-((3R,4R)-3-fluoro-4-(4-hydroxyphenyl)piperidin-1-yl)-1-(3-fluoro-4-methylbenzyl)pyrrolidin-2-one (1.1 g, 2.6 mmol) as a pair of diastereomers. LCMS (Method F) RT: 2.13 min, m/z 401. (M+H)+.

Provenance & Evidence