Trisubstituted hydroxyphenylalkanoic acid ester and amide stabilized compositions
US4093587A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 3, 1976 |
| Grant date | Jun 6, 1978 |
| Priority date | — |
| Expiry date | May 3, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K15/28
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The compounds are esters and amides of trialkylhydroxyphenylalkanoic acid having the formula ##STR1## 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 with alkyl groups, alkylene, polyoxyalkylene or polyvalent cyclic or acyclic hydrocarbon radical, A is lower alkylene, m is 1 to 4 and n is 1 to 6. The ester compounds of this invention are prepared via usual esterification procedures from a suitable alcohol and an acid of the formula I ##STR2## 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 of the above represented compounds, by transesterification with a higher alkanol. The amide compounds of this invention are prepared by usual amidation procedures by reacting a carboxylic acid of formula I or an acid chloride or anhydride or a lower a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.