http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1016524-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/C07D317-54 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D317-22 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D233-72 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D317-54 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D317-22 |
| filingDate | 1963-12-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1966-01-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1016524-A |
| titleOfInvention | Process for the production of 5-methyl-5-(3,4-dihydroxy-benzyl)-hydantoin |
| abstract | In a process for the preparation of the title compound, a ketal or a mixture of ketals of the general formula <FORM:1016524/C2/1> in which one of R and R1 is a hydrogen atom and the other is an alkoxy - methyl radical R1111-OCH2, wherein R1111 is a lower alkyl radical and R11 and R111 are lower alkyl radicals or together represent an alkylene chain containing 2-4 C, is steam distilled at a pH of 2-3.5 until the distillate is formaldehyde-free, treating the resulting aqueous solution with ammonium carbonate and a water-soluble cyanide at a temperature of 15-45 DEG C. and adjusting to pH \sE7. The reaction may be carried out in the presence of a reducing agent. A mixture of ethylene ketals of 4-hydroxy-3-methoxymethyloxy- and 3 - hydroxy - 4 - methoxymethyloxy-phenyl acetones is prepared from 3,4-methylene dioxyphenyl acetone-ethylene ketal. |
| priorityDate | 1962-12-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 26.