Synthesis, complexation behavior and application of a new diphosphite ligand in rhodium-catalyzed hydroformylation

…, W Baumann, D Selent, H Jiao, A Christiansen…

Index: Mikhel, Igor S.; Dubrovina, Natalia V.; Shuklov, Ivan A.; Baumann, Wolfgang; Selent, Detlef; Jiao, Haijun; Christiansen, Andrea; Franke, Robert; Boerner, Armin Journal of Organometallic Chemistry, 2011 , vol. 696, # 19 p. 3050 - 3057

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Citation Number: 8

Abstract

Oxidative coupling of 3-(3-tert-butyl-4-hydroxyphenyl) propionic acid methyl ester (2) gave dimethyl 3, 3′-(5, 5′-di-tert-butyl-6, 6′-dihydroxybiphenyl-3, 3′-diyl)-dipropionate (1c), which upon phosphorylation/transesterification with a phosphochloridite derived from (R)- binaphthol, formed the new unsymmetrical binaphthol-bridged diphosphite 4. A rhodium catalyst based on 4 as ligand gave predominantly iso-selectivity in the hydroformylation of ...

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