Toluene → 2-(4-Tert-butylsulfonylaminopiperidin-1-yl)-5-phenylbenzimidazole

Participants

Reaction Conditions

Reaction Steps

To the toluene solution (1 mL) containing 1-cyano-4-(tert-butylsulfonylamino)piperidine (22 mg) were added 4-phenyl-1,2-phenylenediamine (20 mg) and ytterbium triflate (20 mg), and the mixture was stirred in a sealed tube at 130° C. for 16 hrs. The reaction mixture was cooled to room temperature and diluted with ethyl acetate. The organic layer was washed with aqueous saturated sodium hydrogencarbonate solution and aqueous saturated sodium chloride solutions successively, dried over anhydrous sodium sulfate and concentrated under reduced pressure. The residue was separated and purified on a collective thin-layer chromatograph (chloroform:methanol=15:1) to give the title compound (12 mg).

Provenance & Evidence