Phthalimide → Triphenylphosphine Oxide

Participants

Reaction Steps

DIAD (15.15 mmol, 2.93 mL) was added to a mixture of (biphenyl-2-yl(2-(hydroxymethyl)-5-methoxy-3,4-dihydropyridin-1 (2H)-yl)methanone (4.5 mmol, 1.63 g), phthalimide (15.15 mmol, 2.23 g) and PPh3 (15.15 mmol, 3.97 g) in anhydrous THF dropwise at 0° C. under argon. The resulting mixture was stirred at rt for overnight and concentrated in vacuo to give a crude residue which was purified by chromatography to give the desired 2-((1-(biphenylcarbonyl)-5,5-dimethoxypiperidin-2-yl)methyl)isoindoline-1,3-dione with slight contamination of triphenylphosphine oxide. This contaminated product was used for next step without further purification.

Provenance & Evidence