反应详情

A solution of methyl (2E)-3-(4-hydroxyphenyl)acrylate (0.713 g, 4.00 mmol), [4′-(2-ethoxyethoxy)-2′,6′-dimethylbiphenyl-3-yl]methanol (1.20 g, 4.00 mmol) and tributylphosphine (1.29 g, 6.40 mmol) in toluene (65 mL) was stirred, 1,1′-(azodicarbonyl)dipiperidine (1.61 g, 6.40 mmol) was added in small portions, and the mixture was stirred at room temperature for 24 hr. Hexane (35 mL) was added to the reaction mixture. The precipitated insoluble material was filtrated, and the filtrate was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate:hexane=0:100-25:75), and recrystallized from ethyl acetate-hexane to give the title compound (1.58 g, yield 86%) as colorless crystals.

1. filtrationThe precipitated insoluble material was filtrated
2. concentrationthe filtrate was concentrated under reduced pressure
3. customThe residue was purified by silica gel column chromatography (ethyl acetate:hexane=0:100-25:75)
4. customrecrystallized from ethyl acetate-hexane