O-Xylene → 2-Hydroxy-2'nitro3,4'-diphenyl-5-tert-octylazobenzene

Participants

Reaction Steps

To a solution of sodium hydroxide (12 g, 0.3 mol) and 2-phenyl-4-tert-octylphenol (14.1 g, 0.05 mol) in 150 mL of methanol maintained at 0–5° C. is added portionwise over 1.25 hours 4-phenyl-2-nitrobenzenediazonium hydrogen sulfate (30.6 g, 0.065 mol), prepared in (C) above. The reaction mixture is stirred for two hours at 0–5° C. Xylene (200 mL) is added to the reaction mixture. The organic phase is separated and extracted with water (4×200 mL). The organic phase is filtered and the solvent removed by distillation under an atmosphere of nitrogen. The residue is purified by flash chromatography (90:10 heptane:ethyl acetate eluent) to give 6.56 g of the title compound as a viscous dark red liquid.

Provenance & Evidence