http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-785141-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c7ad58d3c0b071069a8ee0cb8c8ba2e8 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07F9-165 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07F9-165 |
| filingDate | 1955-07-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1957-10-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-785141-A |
| titleOfInvention | Process for the production of o,o-dimethyl phosphorothiolic acid esters |
| abstract | Esters of O,O-dimethyl phosphorothiolic acid are obtained by mixing dimethyl phosphite with an alkyl or substituted alkyl thiocyanate and contacting the mixture with an alkali metal in at least the stoichiometric amount required to form the alkali metal salt of the dimethyl phosphite. The process is preferably carried out in an inert solvent such as benzene, dibutyl ether or dioxane and the reaction temperature is generally between 0 DEG and 150 DEG C. and preferably between 30 DEG and 80 DEG C. In examples: (1) to (6) the S-methyl-, S-ethyl-, S-propyl-, S-isopropyl-, S-benzyl-, and S-hexyl-, esters of O,O-dimethyl phosphorothiolic acid are obtained by adding a suspension of powdered sodium in a solvent to a mixture of dimethyl phosphite with the appropriate organic thiocyanate; (7) a mixture of dimethyl phosphite and b -ethyl-mercaptoethylthiocyanate is reacted with powdered sodium in dibutyl ether to yield O,O-dimethyl-S - b - ethylmercaptoethyl phosphorothiolate; (8) O,O - dimethyl - S - a - carbethoxy ethyl phosphorothiolate is obtained by adding a mixture of dimethyl phosphite and a -thiocyanogen propionic acid ethyl ester to finely divided sodium in benzene; (9) and (10) O,O-dimethyl-O,O-dimethyl-S-carbohexoxyethyl phosphorothiolate are obtained similarly using a -thio cyanogenpropionic acid-n-propyl (and n-hexyl-) esters respectively. The products are stated to have strong insecticidal action. Specification 691,374 is referred to. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-3340330-A |
| priorityDate | 1954-08-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 29.