Triphenylphosphine → tert-Butyl [3-(2,5-difluorophenoxy)propyl]carbamate

Beteiligte Stoffe

Reaktionsschritte

The solution of 2.50 g of 2,5-difluorophenol, 3-(Boc-amino)-1-propanol, 7.26 g of triphenylphosphine and tetrahydrofuran (30 ml) is cooled to 0° C. and admixed dropwise with 5.65 ml of diisopropyl azodicarboxylate. The reaction mixture is stirred at room temperature for a further 2 hours and subsequently concentrated by evaporation. The title compound is obtained as a yellowish solid from the residue by means of flash chromatography (SiO2 60F). Rf=0.34 (1:2 EtOAc-heptane); Rt=4.69.

Herkunft & Nachweise