Light protection agents
First Claim
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1. A compound of the formula ##STR14## in which (a) one of X1 and X2 denotes a secondary alkyl selected from the group consisting of isopropyl or secondary butyl, the other of X1 and X2 denotes secondary-butyl, tert. butyl, tert. amyl, tert. octyl, secondary-nonyl, tertiary. nonyl, 1-phenylethyl, cyclohexyl, or cyclooctyl(b) one of X1 and X2 denotes 1-phenylethyl, the other of X1 and X2 denotes methyl;
- and R1 denotes hydrogen or chloro.
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Abstract
New 2-(2'"'"'-hydroxyphenyl)-benzotriazoles are used for protecting light-sensitive organic materials. They are prepared by diazotization of a 2-nitroaniline, coupling of the resulting diazo compound with a phenol and reduction of the resulting 2-nitroazo compound.
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6 Claims
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1. A compound of the formula ##STR14## in which (a) one of X1 and X2 denotes a secondary alkyl selected from the group consisting of isopropyl or secondary butyl, the other of X1 and X2 denotes secondary-butyl, tert. butyl, tert. amyl, tert. octyl, secondary-nonyl, tertiary. nonyl, 1-phenylethyl, cyclohexyl, or cyclooctyl
(b) one of X1 and X2 denotes 1-phenylethyl, the other of X1 and X2 denotes methyl; - and R1 denotes hydrogen or chloro.
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Current AssigneeCIBA Specialty Chemicals
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Original AssigneeCiba-Geigy Corporation (Novartis Ag)
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InventorsRody, Jean, Heller, Hansjorg
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Primary Examiner(s)Coughlan, Jr., Paul M.
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Application NumberUS05/621,453Time in Patent Office1,145 DaysField of Search260/308 BUS Class Current548/260CPC Class CodesC07D 249/20 with aryl radicals directly...C08K 5/3475 condensed with carbocyclic ...C09K 15/30 containing heterocyclic rin...D06M 13/35 Heterocyclic compounds
