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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

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...

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Main Authors: Bondzic, Bojan (Author) , Rominger, Frank (Author) , Hofmann, Peter (Author)
Format: Article (Journal)
Language:English
Published: 27 July 2016
In: Journal of molecular catalysis. A, Chemical
Year: 2016, Volume: 423, Pages: 472-477
DOI:10.1016/j.molcata.2016.07.049
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.molcata.2016.07.049
Verlag, lizenzpflichtig, Volltext: http://www.sciencedirect.com/science/article/pii/S1381116916303089
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Author Notes:Bojan P. Bondžić, Frank Rominger, Peter Hofmann

MARC

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520 |a 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. 
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