Phthalimide → 2-[3-(1-Diphenylmethylpiperidine-4-yl)-propyl]-isoindol-1,3-dione

Participants

Reaction Conditions

Reaction Steps

20.3 g (65.6 mmol) 3-(1-diphenylmethylpiperidin-4-yl)-propan-1-ol, 17.2 g (65.6 mmol) triphenylphosphine and 9.7 g (65.6 mmol) phthalimide are suspended in 220 ml THF and a solution of 10.4 ml (65.6 mmol) azodicarbonic acid diethyl ester in 50 ml THF is added dropwise within one hour under protective atmosphere and light cooling (ca. 15-25° C.). After a further three hours, the solvent is removed under vacuum and the residue is crystallized from 60 ml 1-chlorobutane. Yield: 12.9 g (45%).

Provenance & Evidence