Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1974-08-02
1976-10-26
Killos, Paul J.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
260 4585B, 260 459NC, 260268C, 260465F, 260521R, 260559R, 260 458NE, C07C 6976
Patent
active
039883639
ABSTRACT:
Ester and amides having the formula ##SPC1##
Wherein R, R.sup.1 and R.sup.2 are independently lower alkyl or cycloalkyl groups, R.sup.3 is hydrogen, alkyl, cycloalkyl, alkylene, phenyl, phenyl substituted by alkyl groups, alkylthioethyl, thiobis-alkylene, alkyleneoxyalkylene, polyoxyalkylene or a polyvalent cyclic or acyclic hydrocarbon radical, R.sup.4 is hydrogen, lower alkyl, cycloalkyl, R.sup.5 is hydrogen, alkyl, phenyl, phenyl substituted by alkyl groups, alkylene, a polyvalent cyclic or acyclic hydrocarbon radical or alkyleneoxyalkylene, A is lower alkylene, m is 1 to 4 and n is 1 to 6.
The esters are prepared by usual esterification procedures from a suitable alcohol and an acid of the formula III ##SPC2##
or an acid halide or acid anhydride thereof. The higher alkyl esters can also be prepared from the lower alkyl ester, especially the methyl ester, by transesterification with a higher alkanol or polyol.
The amides are prepared by usual amidation procedures by reacting a carboxylic acid of formula III, an acid chloride, anhydride or a lower alkyl ester thereof with the appropriate amine.
The nitriles corresponding to acids of formula III are prepared as well as some malonate esters derived having the formula V. ##SPC3##
The compounds are useful as stabilizers or organic materials, especially polyolefins, which deteriorate upon exposure to light and heat.
REFERENCES:
patent: 3206431 (1965-09-01), Doyle et al.
patent: 3285855 (1966-11-01), Dexter et al.
patent: 3542728 (1970-11-01), Gersmann et al.
patent: 3657322 (1972-04-01), Dexter et al.
patent: 3663596 (1972-05-01), Gersmann et al.
patent: R27004 (1970-12-01), Meier et al.
Dexter Martin
Spivack John D.
Ciba-Geigy Corporation
Hall Luther A. R.
Killos Paul J.
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