http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1330824-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_966a6c1f382ec9bcb5e3839dfd73e5b8 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D217-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D317-50 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D317-64 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D317-64 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D217-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D317-50 |
| filingDate | 1972-03-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5d5de4e4be29b68639bdbdc426f4a41e http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c0c5620d73358cae31060a9a2da5d572 |
| publicationDate | 1973-09-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1330824-A |
| titleOfInvention | Methylenation process |
| abstract | 1330824 Methylenation process F HOFFMANN-LA ROCHE & CO AG 24 March 1972 [26 March 1971] 13878/72 Heading C2C A process for the manufacture of aromatic methylene dioxy compounds of the general formula comprises reacting a dihydroxy compound of general formula with methylene chloride in the presence of a strongly basic amine of general formula wherein X represents a group (in which case R 1 to R 6 each represent a C 1-7 alkyl group or R 1 and R 2 , R 3 and R 4 and R 5 and R 6 together with the N atom to which they are attached represent a pyrrolidine or piperidine ring) or a -O-R 7 group (in which R 1 , R 2 to R 4 and R 7 each represent a C 1-7 alkyl group). Examples of the amines are tris-(dimethylamino)methane, tris-(dipyrrolidino) methane, tris-(piperidine) methane, bis-(dimethylamino) - t - butoxymethane and bis - (dimethylamino) methoxymethane. The methylation is preferably carried out at the reflux temperature of methylene chloride and the reaction time is usually 6 to 24 hours. |
| priorityDate | 1971-03-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 31.