Triphenylphosphine → HCID 11220377, compound

Participants

Reaction Steps

A solution of 4-hydroxyindole (2.66 g, 20.0 mmol), t-butyl 3-hydroxy-1-pyrrolidinecarboxylate (7.5 g, 40.0 mmol) and triphenylphosphine (φ3P) (10.5 g 40.0 mmol) in THF is treated with diethyl azodicarboxylate (DEAC)(6.3 ml, 40.0 mmol) under nitrogen at room temperature, stirred for 2 h at room temperature and concentrated in vacuo. The resultant residue is stirred under ether, cooled and filtered. The filtercake is washed with cold ether. The filtrates are combined and concentrated in vacuo. The residue is purified by flash chromatography (silica gel, EtOAc/hexane: 2/80) to give the title compound as a white solid, 3.98 g, mp 164-165° C., identified by NMR and mass spectral analyses.

Provenance & Evidence