2,4,6-Trialkyl L-3-hydroxyphenylalkanoates
US3988363A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 2, 1974 |
| Grant date | Oct 26, 1976 |
| Priority date | — |
| Expiry date | Aug 2, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/22
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
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 malona…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.