http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-778495-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_2dbb2d7ecbd600cf89fbdd230f4a466c |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C59-58 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C59-60 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C59-60 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C59-58 |
| filingDate | 1956-02-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1957-07-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-778495-A |
| titleOfInvention | Processes for the production of vinyl ether derivatives |
| abstract | Vinyl ether derivatives are obtained by the action of phosgene on a vinyl ether of the general formula <FORM:0778495/IV(b)/1> where R1 is an allyl radical of up to 4 carbon atoms, or with R3 forms a 4 : 5-dihydrofuran or 5 : 6-dihydropyran ring, R2 is H or an alkyl radical of up to 4 carbon atoms, and R3 is H or alkyl of up to 4 carbon atoms, or together with R1 completes a 4 : 5-dihydrofuran or 5 : 6-dihydropyran ring, at the most at room temperature, and in presence of a tertiary base not exceeding 0.2 mol. per mol. phosgene in quantity. The products in the case of the simple vinyl ether are a chlorinated ether and a b -alkoxy-acrylic chloride, and in the case of the furan and pyran compounds are a furan or pyran carboxylic chloride and a chloro-tetrahydropyran or furan, which on further treatment with alcohols or phenols give in the case of the chloro-ether an acetal, or the corresponding alkoxy or aryloxy pyran or furan, and in the case of the carboxylic chloride, an alkyl or aryl ester. In examples: (1) carbonyl chloride reacts with ethyl vinyl ether to give b -ethoxyacryloyl chloride and a -chloroethyl ether, the former of which may be converted into b -ethoxy acrylic acid or ethyl b -ethoxy acrylate; (2) carbonyl chloride reacts with ethyl ethyl-vinyl ether to give ethyl a -chlorobutyl ether, and a -ethyl-b -ethoxyacryloyl chloride, converted to a -ethyl-b -ethoxy acrylic acid by caustic soda hydrolysis, and butanal by acid hydrolysis; the ethyl ester of the a -ethyl-b -ethoxy-acrylic acid is referred to; (3) carbonyl chloride reacts with 2 : 3-dihydrofuran or 5 : 6-dihydropyran to give 2-chlorotetrahydrofuran, or 2-chlorotetrahydropyran, and 2 : 3-dihydropyran-4-carboxylic acid chloride or 5 : 6-vinyl ethers specified include butyl and allyl vinyl ethers, and the product from 2-methyl-4 : 5-dihydrofuran and carbonyl chloride is converted directly into 2-methyl-2-ethoxytetrahydrofuran and ethyl 2-methyl-4 : 5-dihydro - furan - 3 - carboxylate. Specification 570,974, [Group IV], is referred to. |
| priorityDate | 1955-03-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 45.