http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1084610-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_8efbae6056f7ee0275c50b0f1e7243be |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08K5-58 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07F7-226 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07F7-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K5-58 |
| filingDate | 1965-12-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1967-09-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1084610-A |
| titleOfInvention | Improvements in and relating to diorganotin derivatives of mercaptoacids |
| abstract | Diorganotin S, O mercaptocarboxylates are prepared by reacting R12SnO (R1 = saturated hydrocarbon radical) with a mixture of a mercaptocarboxylic acid HSCR2(CR2)nCOOH, and a thio-bis-carboxylic acid S(CR2(CR2)n COOH)2, wherein n is 0 to 2, and R is H or a saturated hydrocarbon radical, said mercaptocarboxylic acid being present in at least one mole per mole of R12SnO, and then removing the water which is also formed. Preferably, n = 1 and the reaction is carried out in an inert solvent such as isopropyl ether. The mixture of mercaptocarboxylic acid and thio-bis-carboxylic acid may be prepared by reacting a lactone of the Formula II <FORM:1084610/C2/1> or a halocarboxylic acid of the formula ClCR2(CR2)nCOOH with a water soluble in organic sulphide (preferably an alkali metal hydrosulphide) in a polar solvent, e.g. water at less than 30 DEG C., and then ether extracted for reaction with the diorganotin oxide. The process of the invention eliminates the need to purify the mercapto acid reactant. In the example sodium hydrosulphide was allowed to react with b -propiolactone in aqueous solution at 10 DEG C., the solution acidified, to a pH of less than 1 and extracted with isopropyl ether. The ether extract contained 22% by weight b -mercaptopropionic acid and 4.5% b ,b 1-thio-bis-(propionic acid) and was then reacted with di-n-butyl tin oxide according to the process of the invention. |
| priorityDate | 1964-12-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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