Preparation of alkoxyalkanoic acids
US5175360A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 26, 1990 |
| Grant date | Dec 29, 1992 |
| Priority date | — |
| Expiry date | Nov 26, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/29
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
This invention relates to a process for the preparation of an alkoxyalkanoic acid of the formula EQU RO(CH.sub.2 CHR'O).sub.n CH.sub.2 CO.sub.2 wherein R is an alkyl group of from 1 to about 22 carbon atoms, R' is hydrogen or methyl or mixtures thereof (on the individual molecule) and n is an integer of from 1 to about 12 which comprises reacting the corresponding alkoxyalkanol with a solubilized stable free radical nitroxide having the formula: ##STR1## wherein (1) (a) each of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is an alkyl, aryl or heteroatom substituted alkyl group having 1 to about 15 carbon atoms, and (b) R.sub.5 and R.sub.6 (i) each is an alkyl group having 1 to about 15 carbon atoms provided that when R.sub.1 -R.sub.6 are not all alkyl groups, or a substituted alkyl group having 1 to about 15 carbon atoms wherein the substituent is halogen, cyano, --CONH.sub.2, --OCOCH, OCOC.sub.2 H.sub.5, carbonyl, alkenyl wherein the double bond is not conjugated with the nitroxide moiety, or --COOR wherein R of the --COOR group is alkyl or aryl, or (ii) together form part of a ring that contains 5 carbon atoms and up to two heteroatoms of O or N, or (2) the ##STR2## moiety and the ##STR…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.