Phthalimide → HCID 70204323, compound

Participants

Reaction Steps

In 250 ml of absolute tetrahydrofuran, is dissolved 8.0 g (26.4 mmol) of trans-1-benzyloxycarbonyl-3-hydroxymethyl-4-trifluoromethylpyrrolidine. To the above solution, are added 4.27 g (29.0 mmol) of phthalimide and 8.30 g (31.7 mmol) of triphenylphosphine. Further, 5.0 ml (31.7 mmol) of azo dicarboxylic acid diethyl ester is added dropwise to the above solution on cooling with ice. After stirring at room temperature for 3 hours, the reaction mixture was concentrated under reduced pressure, and diethyl ether was added to the concentrated mixture to give a precipitate. The resulting precipitate was removed by filtration, and the filtrate was concentrated under reduced pressure. The residue was purified with silica gel column chromatography (elusion solvent; chloroform/n-hexane (4/1→8/1)) to give 9.72 g of the objective substance as a colorless powder (yield 85.2%).

Provenance & Evidence