http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7473813-B2
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_34fbeb1e614ea098731393cc639cd372 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2531-24 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2603-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F110-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F110-02 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C1-28 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C1-325 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C17-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C1-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C17-2632 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C17-32 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C1-321 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C2-66 |
| filingDate | 2006-06-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2009-01-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c4fd5be864d70e61bcd08271f22dab7e http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_caafc411cf79d290ae507bffdec904f1 |
| publicationDate | 2009-01-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-7473813-B2 |
| titleOfInvention | Process for the preparation of substituted fluorenes |
| abstract | Methods for the preparation of fluorenyl-type ligand structures and substituted fluorenyl groups which may be employed in metallocene-type olefin polymerization catalysts. There is provided a 2,2′-dihalogen-diphenylmethylene having a methylene bridge connecting a pair of phenyl groups. Each phenyl group has a halogen on a proximal carbon atom relative to the methylene bridge. The halogenated diphenylmethylene is reacted with a coupling agent comprising a Group 2 or 12 transition metal in the presence of a nickel or palladium-based catalyst to remove the halogen atoms from the phenyl groups and couple the phenyl groups at the proximal carbon atoms to produce a fluorene ligand structure. The coupling agent may be zinc, cadmium or magnesium and the catalyst may be a monophosphene nickel complex. The halogenated diphenylmethylene may be an unsubstituted ligand structure or a monosubstituted or disubstituted ligand structure. The halogenated diphenylmethylene may be monosubstituted with a tertiary butyl group or may be a dialkyl diphenylmethylene having alkyl substituents at the directly distal positions of the phenyl groups relative to the methylene bridge. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8093418-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2008026935-A1 |
| priorityDate | 2005-05-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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