反応 #89090

反応方程式

DIAD

biphenyl-2-yl(2-(hydroxymethyl)-5-methoxy-3,4-dihydropyridin-1 (2H)-yl)methanone

phthalimide

PPh3

→

2-((1-(biphenylcarbonyl)-5,5-dimethoxypiperidin-2-yl)methyl)isoindoline-1,3-dione

triphenylphosphine oxide

溶媒

THF

反応条件

後処理

1. 1
   濃縮concentrated in vacuo
2. 2
   その他to give a crude residue which
3. 3
   その他was purified by chromatography

実験手順

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.

出典