Preparation of sterically hindered amine ethers

Organic compounds -- part of the class 532-570 series – Organic compounds – Four or more ring nitrogens in the bicyclo ring system

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544231, 544357, 544360, 544194, 546188, 546189, 546225, 524 91, 524100, 524120, C07D40300, C07D23700, C07D24102, C07D21136, C08L 548

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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.

REFERENCES:
patent: 4921962 (1990-05-01), Galbo et al.
patent: 5204473 (1993-04-01), Winter et al.
patent: 5489683 (1996-02-01), Borzatta et al.
patent: 5496875 (1996-03-01), Borzatta et al.
patent: 5538840 (1996-07-01), Van Toan et al.
patent: 5541274 (1996-07-01), Steinmann
patent: 5844026 (1998-12-01), Galbo et al.
Chemical Abst. 127:248871 of EP 782 994, 1996.
Derwent Abst. 96-343510/35 of EP 723 990, 1996.
Derwent Abst. 95-076334/11 of EP 638 617, 1995.
Walchuk et al, Polymer Preprints, vol. 39, No. 1, Mar. 1998, pp. 296-297.
Nakamura et al, J. Org. Chem., vol 62, No. 16, (1997), pp. 5578-5582.
Nakamura et al., Macromolecules, 1997, 30, pp. 2843-2847.
Bolsman et al., Recueil. Journal of the Royal Netherlands Chemical Society, 97/12, Dec. 1998, pp. 313-319, 1978.
Lee et al., J. Org. Chem. vol. 43, (1978), pp. 4226-4231.
Patel et al., J. Chem Soc. Perkin Trans. 1, (1990) pp. 2729-2731.
Majumdar et al., J. Org. Chem., 62, (1997), pp. 1506-1508.
J. March, Advanced Organic Chemistry, IV Ed., p. 1018, Wiley, 1992.
Kurumada et al., J. Polym. Sci.: Poly. Chem. Ed., vol. 22, pp. 277, 281, (1984).
Chem. Abstr. vol. 16, pp. 2674-2675 for Chem. Ber. 55, pp. 513-522, (1922).
Chem. Ber. 55, pp. 513-522, (1922).
Chem. Ber. 52, pp. 1667-1677, (1919).
Chem. Abstr. 128:68433 for JP 9288339, 1997.
Chem. Abstr. 128:68442 for JP 9292682, 1997.

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