Phthalimide potassium salt → HCID 7663500, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of mesylate 16 (24.05 g, 81.5 mmol) in anhydrous DMF (160 ml) was added potassium phthalimide (15.53 g, 83.8 mmol) and the reaction mixture stirred at 60° C. for 14 h. After cooling to room temperature, the mixture was concentrated under reduced pressure. The residue was diluted with hexanes-EtOAc (7:1, 150 ml) and water (150 ml) and the mixture shaken in separating funnel. A precipitate formed which was removed by filtration, washed excessively with water and hexane, then dried under vacuum to give N-(2-(3-bromophenoxy)ethyl)phthalimide (17) as white fluffy crystals (22.05 g, 78%). The organic layer of the filtrate was concentrated under reduced pressure and the residue was suspended in 10% EtOAc-hexanes. The solution was washed with water and the precipitate collected by filtration, washed with water then hexanes and dried under vacuum to give additional phthalimide 17 (5.65 g). Combined yield (21.18 g, 98%): 1H NMR (400 MHz, CDCl3) δ 7.86 (m, 2H), 7.73 (m, 2H), 7.03-7.12 (m, 3H), 6.80 (ddd, J=8.0, 2.5 and 1.4 Hz, 1H), 4.21 (t, J=6.9 Hz, 2H), 4.10 (t, J=6.0 Hz, 2H).

Provenance & Evidence