Reacción #1943600

Ecuación de reacción

hydrogen

2-nitro-2'-hydroxy-3',5'-di-tert-butylazobenzene

methanol

sodium hydroxide

→

2-(2-Hydroxy-3,5-di-tert-butylphenyl)-2H-benzotriazole

Rendimiento 85.8%

Disolventes

tributyl phosphate

Condiciones de reacción

Tratamiento posterior

1. 1
   OtroThe catalyst was separated by filtration at 80° C
2. 2
   Otrowas obtained in the usual manner in a yield of 85.8%

Procedimiento

Using the general procedure 6, 35.5 grams of 2-nitro-2'-hydroxy-3',5'-di-tert-butylazobenzene was suspended in 100 grams of tributyl phosphate, 50 grams of methanol and 4 grams of sodium hydroxide. To the suspension was then added 8 grams of Raney nickel catalyst and hydrogenation was carried out under 1 atmosphere of hydrogen at 45° C. for 7 hours. The catalyst was separated by filtration at 80° C. The above named product was obtained in the usual manner in a yield of 85.8%.

Fuente