Water → HCID 54324264, compound

Participants

Reaction Steps

To a solution of 5-(4-tert-butoxycarbonyl-piperazin-1-yl)-2-chloro-benzoic acid lithium salt (2.1 g) in N,N-dimethylformamide (50 ml) was added diphenyl phosphorylazide (1.4 ml) and reaction mixture stirred at ambient temperature for 1 hour. Water (30 ml) was added and the reaction mixture heated to 60° C. for 2 hours. After cooling to room temperature, the reaction was poured into ethyl acetate/water, the organic layer separated, washed with water, aqueous NaHCO3 and brine. The organic layer was dried (MgSO4) and concentrated. Purification of the residue by silica gel chromatography (eluting ethyl acetate/iso-hexane (1:3 to 1:1) gave the subtitle product (1.5 g).

Provenance & Evidence