Dimethylamine → Octrizole

Participants

Reaction Steps

35.5 g (0.1 mol) of 2-nitro-2'-hydroxy-5'-t-octylazobenzene, 0.125 g of 5% palladium carbon, 100 ml of toluene, 100 ml of IPA, 50 ml of water and 7 g of 50% dimethylamine were charged into a 500-ml stainless autoclave with an agitator. Reaction was effected in the same way as that employed in Example 1 and stopped when no more hydrogen was absorbed by the reaction solution. After the reaction had been completed, after treatment was performed in the same way as in Example 1 to obtain 26.8 g of 2-(2'-hydroxy-5'-t-octylphenyl)benzotriazole (yield, 82.9%; melting point, 103° to 105° C.).

Provenance & Evidence