55698-85-6Relevant academic research and scientific papers
2,4,6-Trialkyl-3-hydroxyphenylalkane phosphonates and phosphinates
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, (2008/06/13)
The compounds are trialkylsubstituted hydroxyphenylalkanephosphinates and phosphonates having the formula SPC1 Wherein R, R1 and R2 are independently lower alkyl or cycloalkyl groups, R3 is alkyl, alkyl substituted with one halogen atom, phenyl, phenyl substituted with alkyl groups, alkoxy, alkoxy substituted with one halogen groups, phenoxy, phenoxy substituted with alkyl groups, alkylthioethoxy, alkyloxalkylenoxy, R4 is alkyl, alkyll substituted with one halogen atom, cycloalkyl, phenyl, phenyl substituted with alkyl groups, alkylthioethyl, thiobisalkylene, alkylene, polyvalent cyclic or acyclic hydrocarbon radical, A is lower alkylene and n is 1 to 4. These compounds are usually prepared by reacting the trialkylsubstituted hydroxybenzyl or hydroxyphenylalkyl halide with the appropriate trialkyl or triaryl phosphite or appropriate substituted phosphinite. The compounds are useful as stabilizers of organic materials subject to oxidative, thermal and UV light deterioration.
2,4,6-Trialkyl L-3-hydroxyphenylalkanoates
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, (2008/06/13)
Ester and amides having the formula SPC1 Wherein R, R1 and R2 are independently lower alkyl or cycloalkyl groups, R3 is hydrogen, alkyl, cycloalkyl, alkylene, phenyl, phenyl substituted by alkyl groups, alkylthioethyl, thiobis-alkylene, alkyleneoxyalkylene, polyoxyalkylene or a polyvalent cyclic or acyclic hydrocarbon radical, R4 is hydrogen, lower alkyl, cycloalkyl, R5 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.
