反应详情

In 100 ml of xylene were dissolved 34.7 g of crude 2-(2H-benzotriazole-2-yl)-4-(2-hydroxyethyl)-6-(N,N-diethylaminomethyl)phenol synthesized in Example 9 and 25.5 g (0.1 mols) of the purified product of 2-(2H-benzotriazole-2-yl)-4-(2-hydroxyethyl)phenol synthesized in Example 6. 5 ml of methanol solution of 28% sodium methylate was added, and the mixture was refluxed in a nitrogen stream for 10 hours. After completion of the reaction, the reaction mixture was cooled to room temperature. Precipitated yellow crystals were collected by filtration and recrystallized in chloroform, giving 28.5 g of 2,2'-methylenebis[6-(2H-benzotriazole-2-yl)-4-(2-hydroxyethyl)phenol] as white crystals (yield 54%, purity 98.9%).

1. temperaturethe mixture was refluxed in a nitrogen stream for 10 hours
2. customAfter completion of the reaction
3. customPrecipitated yellow crystals
4. filtrationwere collected by filtration
5. customrecrystallized in chloroform