2,4-Bis(1,1-dimethylethyl)-6-[2-(2-nitrophenyl)diazenyl]phenol → 2-(2'-Hydroxy-3'5-di-tert-butylphenyl) benzotriazole

Beteiligte Stoffe

Reaktionsschritte

When using the general procedure of Example 5, a 23% by weight suspension of 2-nitro-2'-hydroxy-3',5'-di-tert-butylazobenzene in isopropanol/triethylamine (1/0.18) was hydrogenated at 45° C. at 1 atmosphere pressure for 3 hours in the presence of 3% of a 5% palladium on charcoal catalyst the above noted product was obtained in a yield of 77%.

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