Thermally activated olefin metathesis catalyst precursor
US5639900A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 29, 1993 |
| Grant date | Jun 17, 1997 |
| Priority date | — |
| Expiry date | Dec 29, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2531/66
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Molybdenum and tungsten compounds that are useful as catalyst precursors in the metathesis of olefins have the general formula: EQU M(Y) (OR.sup.2).sub.x (R.sup.3).sub.y (X).sub.z L.sub.s wherein M is tungsten or molybdenum; Y is oxygen or NR.sup.1 ; R.sup.1, R.sup.2, and R.sup.3 are the same or different and are selected from alkyl, cycloalkyl, cycloalkenyl, polycycloalkyl, polycycloalkenyl, haloalkyl, haloaralkyl, substituted or unsubstituted aralkyl and aryl groups, and silicon-containing analogs thereof; L is a Lewis base; X is halogen; s is 0 or 1; x+y+z=4, and y.gtoreq.1, provided that when x is 2 or more, two OR.sup.2 groups can be replaced by a chelating ligand (OR.sup.2).sub.2. These compounds can be used for the metathesis of olefins in neat metathesizable olefin, as well as in solution, and require only the input of energy to be converted to active catalysts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.