Template-directed ring-closing metathesis and ring-opening metathesis polymerization of functionalized dienes
US6080826A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1997 |
| Grant date | Jun 27, 2000 |
| Priority date | — |
| Expiry date | Dec 18, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/329
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Functionalized cyclic olefins and methods for making the same are disclosed. Methods include template-directed ring-closing metathesis ("RCM") of functionalized acyclic dienes and template-directed depolymerization of functionalized polymers possessing regularly spaced sites of unsaturation. Although the template species may be any anion, cation, or dipolar compound, cationic species, especially alkali metals, are preferred. Functionalized polymers with regularly spaced sites of unsaturation and methods for making the same are also disclosed. One method for synthesizing these polymers is by ring-opening metathesis polymerization ("ROMP") of functionalized cyclic olefins. The metathesis catalysts for both RCM and ROMP reaction are ruthenium or osmium carbene complex catalysts of the formula ##STR1## where M is Os or Ru; R and R.sup.1 each may be hydrogen, C.sub.2 -C.sub.20 alkenyl, C.sub.2 -C.sub.20 alkynyl, C.sub.1 -C.sub.20 alkyl, aryl, C.sub.1 -C.sub.20 carboxylate, C.sub.1 -C.sub.20 alkoxy, C.sub.2 -C.sub.20 alkenyloxy, C.sub.2 -C.sub.20 alkynyloxy, aryloxy, C.sub.2 -C.sub.20 alkoxycarbonyl, C.sub.1 -C.sub.20 alkylthio, C.sub.1 -C.sub.20 alkylsulfonyl or C.sub.1 -C.sub.20 alkyls…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.