4-aralkyl-2-nitro-2'-hydroxy-3',5'-dialkyl (or cumyl)-azobenzene

Details 4-aralkyl-2-nitro-2'-hydroxy-3',5'-dialkyl (or cumyl)-azobenzene 4-aralkyl-2-nitro-2'-hydroxy-3',5'-dialkyl (or cumyl)-azobenzene

1988-04-01

1990-01-02

Higel, Floyd D.

Organic compounds -- part of the class 532-570 series

Organic compounds

Azo

534558, 534565, 534581, 534582, 534583, 534843, 534887, 564336, 564384, 564392, 568731, 568743, C07C10706, C09D 2901, C09D 2912

Patent

active

048914240

ABSTRACT:
4-Aralkyl-2-nitro-2'-hydroxy-3',5'-dialkyl (or cumyl)-azobenzenes are made by coupling the corresponding diazotized 4-aralkyl-o-nitroaniline with the corresponding phenol. These azobenzene intermediates are used to prepare the corresponding 2H-benzotriazole UV absorber stabilizers substituted on the 5-position of the benzo ring by an aralkyl group, preferably alpha,alpha-dimethylbenzyl.

REFERENCES:
patent: 3998804 (1976-12-01), Rody et al.
patent: 4226763 (1980-10-01), Dexter et al.
patent: 4278589 (1981-07-01), Dexter et al.
patent: 4347180 (1982-08-01), Winter et al.

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