反应详情

温度

20 °C

23.1 g (62.5 mmol) 4-{1-[bis(4-fluorophenyl)-methyl]-piperidin-4-yl}-butan-1-ol, 16.4 g (62.5 mmol) triphenylphosphine and 9.2 g (62.5 mmol) phthalimide are suspended in THF and 10.9 g (62.5 mmol) azodicarboxylic acid diethyl ester is added dropwise under a protective atmosphere and light cooling (ca. 15-25° C.). The mixture is stirred for three hours at RT and subsequently the solvent is removed under vacuum. The residue is chromatographically purified over silica gel with CH2Cl2/CH3OH (99.5/0.5) Yield: 27.6 g (90%).

1. customsubsequently the solvent is removed under vacuum
2. customThe residue is chromatographically purified over silica gel with CH2Cl2/CH3OH (99.5/0.5) Yield: 27.6 g (90%)