1,1'-Difluoro-2,2'-bipyridinium Bis(tetrafluoroborate) → HCID 68503284, compound

Participants

Reaction Steps

A solution of 0.581 g of benzyl 3-hydroxy-4-(4-hydroxyphenyl)piperidine-1-carboxylate in 5 ml of acetonitrile is admixed with 0.320 g of N,N′-difluoro-2,2′-bipyridinium bis(tetrafluoroborate) and the suspension is subsequently heated at reflux over 15 hours. The reaction mixture is poured onto 10 ml of saturated aqueous sodium thiosulpphate solution and the mixture is extracted with 2×50 ml of ethyl acetate. The combined organic phases are washed with 10 ml each of 0.5 M HCl and brine, dried over sodium sulphate and concentrated. The title compound is obtained as a colourless solid from the residue by means of flash chromatography (SiO2 60F). Rf=0.33 (2:1 EtOAc-heptane); Rt=3.80.

Provenance & Evidence