http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-1068287-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_86da5ed6a9cbc418dfe89ebc2b7e7716 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D317-50 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J31-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D317-50 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B61-00 |
| filingDate | 1977-01-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1979-12-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_96e7bde1c2f40259edb8fa756f00b7c9 |
| publicationDate | 1979-12-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-1068287-A |
| titleOfInvention | Process for preparing aromatic methylene-dioxy compounds |
| abstract | ABSTRACT A process for preparing aromatic methylene-dioxy compounds by methylenation of aromatic ortho-dihydroxy compounds, wherein aromatic ortho-dihydroxy compounds, of formula in which R, which substitutes 1 to 3 positions in the benzene ring, may be an alkyl with 1 to 4 C atoms, an aldehyde, carboxyl, or alkoxy group with 1 to 4 C atoms, halogen or a nitro group, are reacted with methylene chloride in a concentrated aqueous solution, in the presence of particular ammonium, phosphonium or arsonium salts as catalysts, chosen from the group consisting of: a) quaternary ammonium salts of formula Br-in which R1, R2, R3, R4, the same or different, are alkyls with 2 to 8 carbon atoms. b) quaternary ammonium salts of formula X in which R is an alkyl of 10 to 20 carbon atoms, y= 1 to 12 X is C1 or Br. c) quaternary phosphonium or arsonium salts of formula y-in which X = P or As, R1, R2, R3, R4, the same or different, are linear alkyl radicals of 2 to 18 C atoms, y is C1 or Br. |
| priorityDate | 1976-01-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 42.