Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 11, Issue 21, Pages 6228-6236Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.200500337
Keywords
cyclodextrins; hydroformylation; phosphanes; rhodium; supramolecular chemistry
Categories
Ask authors/readers for more resources
A new class of cationic alpha-cyclodextrins bearing 2-hydroxy-3-trimethylammoniopropyl groups has been synthesised. We investigated their efficiency as mass-transfer promoters in a biphasic hydroformylation reaction catalysed by a rhodium trisulfonated triphenylphosphine system. These cationic alpha-cyclodextrins greatly increased the reaction rate, the chemoselectivity, and, surprisingly, the linear-to-branched aldehyde ratio. We attributed this unexpected enhancement of the linear-to-branched aldehyde ratio to the in situ formation of new catalytic supramolecular species obtained by ion-exchange between the catalyst ligand and the cationic alpha-cyclodextrins.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available