Isobutanol → 3-[4-(4-Cyano-3-fluoro-phenyl)-piperazine-1-carbonyl]-4-isobutoxy-benzenesulfonamide

Participants

Reaction Conditions

Reaction Steps

To 0.1 mmol (3-[4-(4-cyano-3-fluoro-phenyl)-piperazine-1-carbonyl]-4-hydroxy benzenesulfonamide (compound 6.38), 0.5 mmol 2-methyl-1-propanol and 0.3 mmol diphenyl-2-pyridylphosphine in 4 ml THF was added 0.3 mmol di-tert-butyl azodicarboxylate, and the mixture was stirred at 60° C. for 4 h. The mixture was then diluted with ethyl acetate and washed twice with 5 M aq HCl and then with saturated aq NaCl solution. The organic phase was then dried with Na2SO4, and concentrated in vacuo. The residue was triturated in ether to afford the title compound. MS (m/e): 459.2 ([M−H]−, 100%)

Provenance & Evidence