http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-817360-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5c24684033fba97d1ad845ce453a57e3 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A01N57-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07F9-1651 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07F9-165 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A01N57-12 |
| filingDate | 1957-09-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f732bba0028600d0db572c3c43ac1d95 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d7e1170514548443821311bc8178aa08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_fbd79977e77547762f1dd2f4bc9afbf9 |
| publicationDate | 1959-07-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-817360-A |
| titleOfInvention | Chloromethylated o:o-dialkyl-thiophosphoric acid esters and a process for their manufacture |
| abstract | The invention comprises chloromethylated O,O-dialkyl thiophosphoric acid esters of the general formula (RO)(R1O)P(S)XCH2Cl in which R and R1 each stand for CH3 or C2H5 and X is oxygen or sulphur. They may be obtained by reacting the alkali metal or ammonium salts of the appropriate O,O-dialkyl thiophosphoric acids with chloro - bromomethane. The reaction is suitably carried out with an excess of chlorobromo-methane and an inert solvent may be present, e.g. methanol, ethanol, acetone or tetrahydrofurane. The reaction is generally carried out below 100 DEG C. and preferably at 50-70 DEG C. A small amount of an alkali metal iodide may be added to the reaction mixture to increase the yield of the product. When the reaction is complete the bromide formed is filtered off and excess chlorobromo-methane is recovered by distillation and this may be used again for further batches. The product is obtained by distillation of the residue. Examples are given for the production of: (1) O,O - diethyl - thionothiol - phosphoric acid S-chloromethyl ester; (2) O,O-dimethyl-thionothiol - phosphoric acid - S - chloromethyl ester and (3) O,O - diethyl - thiono - phosphoric acid-O-chloromethyl ester. In the examples for the production of products (1) and (2) the potassium salt of the O,O-dialkyl thiophosphoric acid is used and in the case of product (3) the ammonium salt is used. The products are stated to be effective as insecticides and to be valuable as intermediates for the production of other insecticides. Some bis - (O,O - diethyl - thionothiol-phosphoryl)-formal is also formed in one example for the production of product (1) and remains as residue after distillation of the product. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4191757-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2410958-A1 |
| priorityDate | 1955-12-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 38.