Process for the preparation of ligands for olefin polymerization catalysts
US6706891B2 · kind B2 · utility
8Cited by
24References
16Claims
0Family size
Assignee
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Key dates
| Filing date | Nov 2, 2001 |
| Grant date | Mar 16, 2004 |
| Priority date | — |
| Expiry date | Nov 4, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D339/08
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Processes for the preparation of 4,5-bisimino-[1,3]dithiolanes and 2,3-bisimino-[1,4]dithianes are described. The processes involve conversion of an oxalamide to a dithiooxalamide, followed by conversion of the dithiooxalamide to either a 4,5-bisimino-[1,3]dithiolane or a 2,3-bisimino-[1,4]dithiane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.