Process for one-pot synthesis of 1,1-diphenyl-1-(3-substituted-cyclopentadienyl)-1-(2,7-di-t-butyl-fluoren-9-yl)methane type ligands
US7468452B1 · kind B1 · utility
35Cited by
2References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 12, 2007 |
| Grant date | Dec 23, 2008 |
| Priority date | — |
| Expiry date | Dec 12, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/943
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention is directed to a method of making a ligand which can be used to form an ansa-metallocene. Further, the present invention is directed to a method of making the ansa-metallocene. In both methods the process steps employed to form the ligand are conducted in the presence of tetrahydrofuran, a substituted tetrahydrofuran, tetrahydropyran, a substituted tetrahydropyran or ethylene glycol dimethyl ether.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.