4-higher alkyl-2-nitro-2'-hydroxy-3',5'-di-higher alkyl (or cumy

Details 4-higher alkyl-2-nitro-2'-hydroxy-3',5'-di-higher alkyl (or cumy 4-higher alkyl-2-nitro-2'-hydroxy-3',5'-di-higher alkyl (or cumy

1987-11-13

1989-07-11

Higel, Floyd D.

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

Organic compounds

Azo

534558, 534565, C07C10706, C09B 2901, C09B 2912

Patent

active

048473677

ABSTRACT:
4-Higher alkyl-2-nitro-2'-hydroxy-3',5'-di-higher alkyl (or cumyl)-azobenzenes are made by coupling the corresponding diazotized 4-higher alkyl-o-nitroaniline with the corresponding substituted 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 a higher alkyl group, preferably tert-octyl or n-dodecyl.

REFERENCES:
patent: 3998804 (1976-12-01), Rody et al.
patent: 4226763 (1980-10-01), Dexter et al.
patent: 4275004 (1981-06-01), Winter et al.
patent: 4278589 (1981-07-01), Dexter et al.
patent: 4347180 (1982-08-01), Winter et al.
Tanimoto et al., J. Synthetic Org. Chem., vol. of 1986, pp. 647-649.

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