Synthesis, complexation behavior and catalytic performance of chelating bisphosphite ligands based on 9,10-brigded 9,10-dihydroanthracenes in Rh catalyzed hydroformylation of 4-pentenal

• Verfasst von: Bondzic, Bojan [VerfasserIn]
• Verfasst von: Rominger, Frank [VerfasserIn]
• Verfasst von: Hofmann, Peter [VerfasserIn]
• Titel: Synthesis, complexation behavior and catalytic performance of chelating bisphosphite ligands based on 9,10-brigded 9,10-dihydroanthracenes in Rh catalyzed hydroformylation of 4-pentenal
• Verf.angabe: Bojan P. Bondžić, Frank Rominger, Peter Hofmann
• E-Jahr: 2016
• Jahr: 27 July 2016
• Umfang: 6 S.
• Fussnoten: Gesehen am 14.05.2020
• Titel Quelle: Enthalten in: Journal of molecular catalysis / A
• Ort Quelle: Amsterdam [u.a.] : Elsevier Science, 1994
• Jahr Quelle: 2016
• Band/Heft Quelle: 423(2016), Seite 472-477
• DOI: doi:10.1016/j.molcata.2016.07.049
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Aldehydes
• Sach-SW: Hydroformylation
• Sach-SW: Mechanism investigation
• Sach-SW: Phosphite ligands
• Sach-SW: Rh catalysis
• K10plus-PPN: 1698246579

Abstract

In the present work the modular synthesis of new chelating bisphosphite ligands based on 9,10-brigded 9,10-dihydroanthracenes as ligand backbones is presented. The complexation behavior of these ligands in rhodium metal complexes as well as mechanistic studies of the preformation step of the rhodium-catalysed hydroformylation is investigated. Ratio of coordination isomers in the Rh complexes of these ligands has been determined using NMR based calculation technique. Modular synthesis route was established allowing for a variety of ligands to be synthesized in a standard procedure The new ligands were tested in the hydroformylation of 4-pentenal under optimized conditions to give adipic aldehyde a promising starting material for the polyamide nylon-6,6. Ligand L3 showed the best selectivity towards adipic aldehyde with selectivity of 10.2/1 n/iso aldehyde.