2,6-Di-tert-butylphenol → 4-(2-Chloronicotinoyl)2,6-di-tertiary butylphenol
反応式
[Cl:1][C:2]1[N:10]=[CH:9][CH:8]=[CH:7][C:3]=1[C:4](Cl)=[O:5].[C:11]([C:15]1[CH:20]=[CH:19][CH:18]=[C:17]([C:21]([CH3:24])([CH3:23])[CH3:22])[C:16]=1[OH:25])([CH3:14])([CH3:13])[CH3:12]>ClC(Cl)C>[Cl:1][C:2]1[N:10]=[CH:9][CH:8]=[CH:7][C:3]=1[C:4]([C:19]1[CH:18]=[C:17]([C:21]([CH3:22])([CH3:23])[CH3:24])[C:16]([OH:25])=[C:15]([C:11]([CH3:14])([CH3:13])[CH3:12])[CH:20]=1)=[O:5]参加物
4
実験手順
To a solution of 282 g of 2-chloronicotinoyl chloride and 400 g of 2,6-di-tertiary butylphenol in 1000 ml of dichloroethane under ice-cooling is added dropwise a solution of 500 g of anhydrous stannic chloride in 250 ml of dichloroethane with stirring over 50 minutes. The reaction temperature is kept below 5° C. during the addition. After completion of the addition, the mixture is stirred at room temperature for 1.5 hours. The resulting reaction mixture is poured into ice-cold water and stirred for a while. The organic layer is separated, washed with water, dried and then concentrated. The obtained residue is recrystallized from an aqueous solution of 80% methanol to give 442 g of 4-(2-chloronicotinoyl)-2,6-di-tertiary butylphenol as pale yellow crystals, melting at 135°-137° C.