http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1477020-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_14effe3850d2129f863b969dac4f1db8 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D231-12 |
| classificationIPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A01N43-56 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D231-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D231-12 |
| filingDate | 1974-08-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1977-06-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1477020-A |
| titleOfInvention | Method for the preparation of 3,5-disubstituted pyrazoles |
| abstract | 1477020 3,5-Diphenylpyrazole AMERICAN CYANAMID CO 15 Aug 1974 [17 Sept 1973] 36038/74 Heading C2C Compounds (I), where R 1 and R 2 are the groups A and B respectively, where Y, Z, Y<SP>1</SP>, Z<SP>1</SP> are hydrogen, halogen, methylthio, methylsulphonyl, cyano, carboxy, C 1-4 carboalkoxy. C 1-4 alkyl, C 1-4 haloalkyl (containing 1-4 halogen atoms) or C 1-4 alkoxy, are made by refluxing a pyrazole (II) in the presence of a catalyst selected from (a) Pd on carbon, (b) Pt on carbon and (c) pre-reduced copper chromite and an inert solvent the latter having a boiling point of at least 200 C. when catalyst (c) above is used, and the preparation of a compound (III) where R 3 is C 1-4 alkyl, attached to one or other of the ring nitrogen atoms by alkylating the corresponding pyrazole where R 3 is hydrogen. Pyrazolines (II), where R is hydrogen are made by a ketone R 1 COCH 3 with an aldehyde R 2 CHO, in the presence of a base, in a C 1-4 alcohol at 10-70 C., acidifying the mixture to below pH7 and treating the product with hydrazine at below 70 C. |
| priorityDate | 1973-09-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 33.