Pyrophosphite ligands and their use in transition metal catalyzed processes
US5858905A · kind A · utility
4Cited by
6References
7Claims
0Family size
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Key dates
| Filing date | Jul 23, 1997 |
| Grant date | Jan 12, 1999 |
| Priority date | — |
| Expiry date | Jul 23, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2531/828
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Catalyst systems which comprise a transition metal and a pyrophosphite ligand are particularly effective as catalysts for hydrosilation reactions. The transition metal is from groups 7-11 of the Periodic Table, and the pyrophosphite has the following formula: ##STR1## wherein E and E' are independently a direct bond, --S--, --Se--, or --CR.sub.9 R.sub.10 -- where R.sub.9 and R.sub.10 are independently hydrogen or alkyl of 1-18 carbon atoms, and R.sub.10 can also be phenyl. R is H or methyl, R.sub.1-8 are independently H, C.sub.1-18 alkyl, C.sub.5-12 cycloalkyl, or C.sub.7-15 phenylalkyl.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.