Hydrochloric Acid → 1-(4-Bromophenyl)-2-hydroxy-2-p-tolylethanone
反応式
[Br:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]([CH:10]=[O:11])=[O:9])=[CH:4][CH:3]=1.[Cl-].[Al+3].[Cl-].[Cl-].Cl>C1(C)C=CC=CC=1>[Br:1][C:2]1[CH:3]=[CH:4][C:5]([C:8]([CH:10]([C:2]2[CH:7]=[CH:6][C:5]([CH3:8])=[CH:4][CH:3]=2)[OH:11])=[O:9])=[CH:6][CH:7]=1参加物
5
実験手順
A solution of 67 g. (0.314 mole) of p-bromophenyl-glyoxal in 300 ml. of dry toluene is added dropwise over 1 1/2 hours to a stirred suspension of 84 g. (0.6 mole) of anhydrous aluminum chloride in 1.25 l. of dry toluene cooled in an ice-bath. Stirring in the cold is continued for 5 hours and the mixture then is held at 5°-10°C. overnight. The mixture is poured into about 2 l. of ice and 6N hydrochloric acid. The aqueous phase is separated and re-extracted with three portions of benzene. The combined, washed and dried organic extracts are concentrated under reduced pressure to a volume of about 200 ml. Dilution with 150 ml. of petroleum ether precipitates the white crystalline product, m.p. 80°-82°C. Repeated recrystallization from 60% ethanol affords the analytical sample, m.p. 82°-83.5°C.