Sodium Hydroxide → 2-Phenyl-3-(piperazin-1-yl)quinoxaline-6-carboxylic acid

Participants

Reaction Conditions

Reaction Steps

Solutions of methyl 2-phenyl-3-(piperazin-1-yl)quinoxaline-6-carboxylate (160 mg, 0.42 mmol, 1.00 equiv.) in THF/MeOH (1:1) (20 mL) and sodium hydroxide (91.9 mg, 2.30 mmol, 5.00 equiv) in water (1.5 mL) were placed in a 50-mL round bottom flask, stirred for 3 hrs at 30° C. in an oil bath, and then concentrated under vacuum. The residue was dissolved in 4 mL of DMSO and purified via silica gel column (DCM/MeOH (5:1)) yielding 42 mg (29%) of 2-phenyl-3-(piperazin-1-yl)quinoxaline-6-carboxylic acid as a yellow solid.

Provenance & Evidence