http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-807697-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_af99df08b153738cd418446a75d09bfc |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C69-63 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-63 |
| filingDate | 1957-07-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1959-01-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-807697-A |
| titleOfInvention | Polyhydric alcohol esters of 2,2,3-trichloropropionic acid |
| abstract | The invention comprises the fully esterified reaction products of 2:2:3-trichloropropionic acid with aliphatic polyhydric alcohols. The reaction is carried out by heating together the 2:2:3-trichloropropionic acid and the polyhydric alcohol, preferably with removal of the water of reaction as rapidly as it forms either by operating under reduced pressure or by azeotropic distillation using a water-immiscible solvent such as ethylene dichloride, monochlorobenzene or toluene. Sulphuric acid may be used as a catalyst. Specified polyhydric alcohols other than those specified in examples are triethylene glycol, tripropylene glycol, tri-(trimethylene) glycol, hydroxyethoxy-propanol or ethanol and hydroxyethoxypropoxy-propanol or ethanol. The compounds are used as herbicides and parasiticides (see Group VI). In examples diethylene glycol is heated with 2:2: 3-trichloropropionic acid and ethylene dichloride with continuous removal of water by distillation to give diethylene glycol, bis(2:2:3-trichloropropionate) and the esters of the following alcohols are prepared similarly: ethylene, propylene, trimethylene and di-propylene or trimethylene glycols; 1-(21-hydroxyethoxy)-2-propanol; glycerol, erythritol and pentaerythritol. The preparation of certain polyhydric alcohols is also described. Thus, 1-(21-hydroxypropoxy) - 2 - propanol may be prepared by reacting 1:2-propanediol with propylene oxide in the presence of sodium hydroxide; 2 - (21 - hydroxypropoxy) - 1 - propanol may be prepared by reacting 1-methoxy-2-propanol with propylene oxide to give 1-(21-methoxyisopropoxy)-2-propanol and treating this with hydrogen bromide; 2-(21-hydroxy-11-methylethoxy) - 1 - propanol may be prepared by reducing 1 : 11-dicarboethoxy-diethyl ether with lithium aluminium hydride and di- and tri-(trimethylene) glycols may be prepared by heating 1 : 3-propanediol in the presence of iodine.ALSO:The fully esterified reaction products of polyhydric aliphatic alcohols and 2 : 2 : 3- trichloropropionic acid (see Group IV (b)) may be used as herbicides and parasiticides. Thus they may be diluted with inert finely-divided solids and the mixture used as a dust or dispersed in water as a spray. They may also be used in oil-in-water emulsions with or without a wetting or emulsifying agent. Specified compounds include diethylene glycol bis-(2 : 2 : 3-trichloropropionate), propylene glycol bis-(2 : 2 : 3-trichloropropionate) and crythritol tetrakis - (2 : 2 : 3-trichloropropionate). |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2008151784-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-101687742-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2008151785-A1 |
| priorityDate | 1956-07-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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