反应详情

A solution of 4,5-bis(4-fluorophenyl)-2-(1-methylethyl)-1H-imidazole (200 mg) and propiolaldehyde (75% solution in toluene, 0.15 ml) in dry THF (15 ml) were heated under reflux, under nitrogen for 24 h. The residue was dissolved in acetone and absorbed onto silica gel before purifying by CC eluting with petroleum ether (b.p. 40°-60°)/ethyl acetate (2:1) to give the title compound (84 mg) as a pale yellow solid, δ(CDCl3), 1.49 (d,J=7 Hz, Me2CH), 3.25 (septet, J=7 Hz, Me2CH), 5.67 (dd,J=15 Hz, 7 Hz,CH=CH.CHO), 6.95 and 7.10-7.60 (t,J=9 Hz and m, CH=CH.CHO and aromatic protons), 9.40 (d, J=7 Hz, CH=CH.CHO).

1. temperatureunder reflux, under nitrogen for 24 h
2. customabsorbed onto silica gel
3. custombefore purifying by CC
4. washeluting with petroleum ether (b.p. 40°-60°)/ethyl acetate (2:1)