http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1339111-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_02952b53249649e8f35d68904f49ad0b |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C59-305 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C11D3-2089 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D319-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F5-10 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D319-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C11D3-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C23G1-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C59-305 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F5-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C11D3-00 |
| filingDate | 1972-02-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1973-11-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1339111-A |
| titleOfInvention | Hydroxy-ether-carboxylic acids |
| abstract | 1339111 Hydroxy ether carboxylic acids HENKEL & CIE GmbH 2 Feb 1972 [23 Aug 1971] 4790/72 Heading C2C Compounds of formula in which R 1 and R 2 represent H atoms or COOH groups which may be the same or different, Z is 0 or 1, and m, n, and o are each 0 or 1, provided that at least one of m, n, and o is 1 and at least two carboxyl groups and one hydroxyl group are present in the molecule, specifically monoo-carboxymethyl tartaric acid and 1,2-bis-ocarboxymethyl glycerine are prepared by reacting a compound of formula in which R 3 and R 4 represent H-atoms or ester groups, X represents OH groups or halogen atoms, and q is zero or 1, and which contains at least 2 hydroxyl groups, with a diazoacetic acid ester in the molar ratio 1 : 1 to 1 : (n - 1), where n = number of OH groups, in the presence of a Lewis acid and saponifying the resulting product. An alternative preparation is by reacting a glycolic acid ester with an epoxy compound such as epoxy succinic acid esters in the presence of an acid alkyloxylation catalyst and saponifying the result e.g. with sodium hydroxide solution or by acidic cation exchanger. Starting materials may be glycerine, glycerine-α-monochlorohydrin, and esters from glycerine, tartaric, trihydroxyglutaric and erythronic acids and products may be 1,2-bi.s-o-carboxymethyl glycerine, mono-o-carboxymethyl glycerine, tartaric, erythronic, -1,2,3, trihydroxyglutaric acids and 1,2-bis-o-carboxymethyl-1,2,3-trihydroxyglutaric acid. The first method produces mixtures of esters and lactones, the ring of which may be opened by sodium ethylate to form the ester or under saponification conditions the acid. Examples describe the preparation of mono-ocarbethoxymethyl tartaric acid diethyl ester with 5,6-dicarbethoxy-1,4-dioxanone-2, bis-ocarboxymethyl glycerine-α-monochlorohydrin and bis-o-carboxymethyl-glycerine. |
| priorityDate | 1971-02-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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