Triphenylphosphine → methyl 3-[4-([(2-nitrophenyl)sulfonyl]{4-[(2-phenyl-1H-indol-1-yl)methyl]benzyl}amino)phenyl]propanoate

Participants

Reaction Steps

A solution of methyl 3-(4-{[(2-nitrophenyl)sulfonyl]amino}phenyl)propanoate (0.583 g, 1.60 mmol), {4-[(2-phenyl-1H-indol-1-yl)methyl]phenyl}methanol (0.470 g, 1.50 mmol) and triphenylphosphine (0.787 g, 3.00 mmol) in tetrahydrofuran (25 mL) was stirred under ice-cooling, and diethyl azodicarboxylate (40% toluene solution, 1.36 mL, 3.00 mmol) was added. The mixture was allowed to warm to room temperature and stirred for 3 hr. The reaction mixture was concentrated under reduced pressure, and the residue was purified by silica gel column chromatography (20%-60% ethyl acetate/hexane). Hexane-ethyl acetate was added to the obtained residue and the resultant insoluble material was filtered off. The filtrate was concentrated to give the title compound as a brown oil.

Provenance & Evidence