http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-743302-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_04650c4315071ee8af7d26e3441a53b1 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D213-75 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D209-86 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D295-182 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D213-75 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D209-86 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D295-182 |
| filingDate | 1953-10-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1956-01-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-743302-A |
| titleOfInvention | Acrylamides |
| abstract | N-substituted acrylamides in which the amide nitrogen is connected to an aliphatic, a cycloaliphatic, an aromatic or a heterocyclic substituent by a carbon to nitrogen bond are prepared by dehydrating the corresponding N-substituted hydracylamides by subjecting them to an elevated temperature in the presence of a catalyst comprising thoria and alumina, preferably activated alumina impregnated with thoria. The catalyst may be used in fixed bed or fluidized form. The dehydration is preferably effected in vapour phase at 200 DEG to 400 DEG C., generally under reduced pressure; polymerization inhibitors may be present. The acrylamides are polymerizable and copolymerizable. In examples (1) N-hydracryl-pyrrolidine is distilled under reduced pressure through a column of thoria on activated alumina maintained at 298 DEG to 320 DEG C. yielding N-acrylyl pyrrolidine; (2) crude N-methyl hydracylamide is dehydrated in like manner yielding N-methyl acrylamide; (3) N-phenyl hydroacrylamide containing hydroquinone is treated likewise yielding N-phenyl acrylamide. Numerous other hydracrylamido starting materials are mentioned including N-isoamyl hydracylamide, N,N-di-t-butyl hydracrylamide, N-dodecyl hydracrylamide, N-dicyclohexyl hydracrylamide, N-(o-chlorophenyl) hydracylamide, N-hydracrylyl piperidine, N-hydracrylyl morpholine, N-(a -pyridyl) hydracrylamide, N-(a -thienyl) hydracrylamide, N - (a - thenyl) - hydracrylamide and N-hydracrylyl-carbazole. N - substituted hydracrylamides are prepared by reacting b -propiolactone with a suitable amine in the presence of water at, preferably, -10 DEG to +50 DEG C. The preparation of N-hydracrylyl pyrrolidine, a new compound, is described in detail. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-1046608-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2957800-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0018629-A1 |
| priorityDate | 1952-10-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 53.