Phthalimide → 2-(1-(5-Chloro-3-(2-chloro-5-fluorophenyl)quinoxalin-2-yl)ethyl)isoindoline-1,3-dione

Participants

Reaction Steps

To a solution of 1-(5-chloro-3-(2-chloro-5-fluorophenyl)quinoxalin-2-yl)ethanol (0.08320 g, 0.2468 mmol) in tetrahydrofuran (2.468 mL, 0.2468 mmol) were added triphenylphosphine (0.07766 g, 0.2961 mmol), phthalimide (0.04357 g, 0.2961 mmol), and diisopropyl azodicarboxylate (0.05735 mL, 0.2961 mmol). The reaction mixture was stirred at room temperature. After 6 h, the mixture was concentrated under reduced pressure and partitioned between EtOAc (100 mL) and brine (100 mL). The combined organic layers were dried over Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography on a 40 g of Redi-Sep™ column using 0 to 10% gradient of EtOAc in hexane over 10 min, then 10% isocratic of EtOAc for 20 min, then 10 to 50% gradient of EtOAc in hexane over 20 min, then 50% isocratic of EtOAc for 3 min as eluent to give 2-(1-(5-chloro-3-(2-chloro-5-fluorophenyl)quinoxalin-2-yl)ethyl)isoindoline-1,3-dione as a tan solid: LC-MS (ESI) m/z 466.0 [M+H]+.

Provenance & Evidence