HCID 136340718, compound → HCID 54316939, compound

Participants

Reaction Steps

6.03 g (18 mmols) of crude 4-(4-hydroxybutyl)-2-[(2-nitrophenyl)azo]phenol synthesized in Example 15 was dissolved in 18 ml of aqueous solution of 2N sodium hydroxide. 9 ml of previously prepared aqueous solution of 25% sodium hydroxide and 5.4 g (83 mmols) of zinc powder were simultaneously added over a period of about 3 hours. The subsequent treatment was carried out in the same manner as in Example 6, giving 4.41 g of 2-(2H-benzotriazole-2-yl)-4-(4-hydroxybutyl)phenol as pale yellow crystals (yield 78%, purity 90%).

Provenance & Evidence