Nonpolar phase-soluble metathesis catalysts
Abstract
One embodiment of the invention provides polyisobutylene (PIB) oligomers that are end-functionalized with ruthenium (Ru) catalysts. Such nonpolar catalysts can be dissolved in nonpolar solvents such as heptane, or any other nonpolar solvent that is otherwise not latently biphasic (i.e., if two or more solvent components are present, they remain miscible with each other throughout the entire reaction process, from the addition of substrate through to the removal of product). Substrate that is dissolved in the nonpolar solvent with the catalyst is converted into product. The lower solubility of the product in the nonpolar solvent renders it easily removable, either by extraction with a more polar solvent or by applying physical means in cases where the product precipitates from the nonpolar solvent. In this manner the catalysts are recycled; since the catalysts remain in the nonpolar solvent, a new reaction can be initiated simply by dissolving fresh substrate into the nonpolar solvent.
Subject
C07C 67/333B01J 31/06
B01J 31/1683
B01J 31/2278
B01J 31/2291
B01J 31/2295
C07C 67/30
C07C 67/58
C07D 207/46
C07D 207/48
C07D 211/94
C07D 211/96
C07D 233/58
C07D 295/24
C07D 403/14
C08L 65/00
B01J 2231/543
B01J 2531/17
B01J 2531/821
C07C 2601/10
C07C 2601/16
C08G 2261/418
C07C 69/75
C07C 69/74
Collections
Citation
Bergbreiter, David E.; Bazzi, Hassan S.; Hongfa, Chayanant (2018). Nonpolar phase-soluble metathesis catalysts. United States. Patent and Trademark Office; Texas A&M University. Libraries. Available electronically from https : / /hdl .handle .net /1969 .1 /177254.