Organic compounds -- part of the class 532-570 series – Organic compounds – Four or more ring nitrogens in the bicyclo ring system
Patent
1999-02-19
2000-09-12
Raymond, Richard L.
Organic compounds -- part of the class 532-570 series
Organic compounds
Four or more ring nitrogens in the bicyclo ring system
544231, 544357, 544360, 544194, 546188, 546189, 546225, 524 91, 524100, 524120, C07D40300, C07D23700, C07D24102, C07D21136, C08L 548
Patent
active
061179957
ABSTRACT:
A new process is described for the preparation of a compound of the formula I ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4, independently of each other, are C.sub.1 -C.sub.8 alkyl or C.sub.1 -C.sub.5 hydroxyalkyl, or R.sub.1 and R.sub.2 together with the carbon atom they are attached to are C.sub.5 -C.sub.2 cycloalkyl, or R.sub.3 and R.sub.4 together with the carbon atom they are attached to are C.sub.5 -C.sub.12 cycloalkyl; R.sub.5, R.sub.6, R.sub.7, R.sub.8 and R.sub.9, independently of each other, are H, C.sub.1 -C.sub.8 alkyl, C.sub.2 -C.sub.8 alkenyl, C.sub.5 -C.sub.12 aryl, C.sub.1 -C.sub.4 haloalkyl, an electron withdrawing group, or C.sub.6 -C.sub.12 aryl which is substituted by a residue selected from C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, halogen; and R.sub.7 and R.sub.8 together may also form a chemical bond; and R is an organic linking group containing 2-500 carbon atoms and forming, together with the carbon atoms it is directly connected to and the nitrogen atom, a substituted, 5-, 6 or 7-membered cyclic ring structure; characterized in that a compound of the formula II ##STR2## is oxidized. The compound of the formula I can be hydrogenated and/or halogenated by conventional methods.
Compounds of the formula I and the corresponding hydrogenated and/or halogenated compounds are well suitable as stabilizers for organic material against degradation by light, oxygen and/or heat or yellowing; some are also active as flame retardants.
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Ferri Gianluca
Sala Massimiliano
Zedda Alessandro
Ciba Specialty Chemicals Corporation
Hall Luther A. R.
Raymond Richard L.
Stevenson Tyler A.
Truong Tamthom N.
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