Thermoregulated phase transfer ligands and catalysis. I. Synthesis of novel polyether-substituted triphyenylphosphines and application of their rhodium complexes in two-phase hydroformylation

Zhang, Jin; Zheng, Xiaolai; Fell, Bernhard

doi:10.1016/s1381-1169(96)00281-6

Cited by 116 publications

(23 citation statements)

References 12 publications

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“…Therefore the ligands phase behaviour can be exactly customised depending on the required reaction temperature. [27] So far PAO-modified ligands were basically used in hydroformylation ( Figure 6) and hydrogenation reactions of higher alkenes where almost similar activities were achieved as with classical homogeneous catalysis as well as in selective reductions of nitroarenes ( Figure 7). [28][29][30][31] For example a turnover frequency (TOF) of 470 h À1 and a yield of 94 % could be achieved in the hydroformylation of styrene.…”

Section: Thermoregulated Phase-transfer Catalystsmentioning

confidence: 97%

“…Subsequent product separation and catalyst recycling can be accomplished by phase separation. [27][28][29][30][31] Again as in fluorous catalysis, many ligands were developed for TRPTC based on the well known classical ligands for homogeneous catalysis. In this course polyether-substituted triphenylphosphines (PETPP),…”

Section: Thermoregulated Phase-transfer Catalystsmentioning

confidence: 99%

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Thermoregulated Liquid/Liquid Catalyst Separation and Recycling

2006

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Considerable effort has been done to overcome the loss of catalyst in homogeneously catalysed processes. In this contribution we describe five recycling concepts for thermoregulated catalyst separation and recycling: fluorous biphasic systems (FBS), thermoregulated phase transfer catalysis (TRPTC), soluble polymer-based catalysis, thermoregulated microemulsions and temperature-dependent multicomponent solvent systems (TMS). Each of these concepts has its own special advantages like low catalyst leaching or simple process engineering but also drawbacks like usage of expensive special solvents or complex and expensive catalysts. In this context, TMS systems exhibit most advantages of the other concepts combined with the possibility to use common and cheap solvents as well as numerous classical molecular catalysts. Therefore, TMS systems are expected to be one of the most promising thermomorphic recycling concepts for industrial scale.

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Section: Thermoregulated Phase-transfer Catalystsmentioning

confidence: 97%

Section: Thermoregulated Phase-transfer Catalystsmentioning

confidence: 99%

Thermoregulated Liquid/Liquid Catalyst Separation and Recycling

2006

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“…Approaches for immobilization of homogeneous complex to solve this problem have been explored, which can broadly be grouped into two types. Firstly, biphasic systems involve in designing the catalyst so that it is soluble in a solvent as a "liquid carrier", under some conditions, is immiscible with the reaction products [9][10][11][12][13]. Another strategy has long been attachment of the catalyst to polymers resin or silica and the separation are recyclable by a simple filtration [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

The PPh3 ligand modified Rh/SiO2 catalyst for hydroformylation of olefins

Zhu¹,

Ding²,

Li³

et al. 2004

Catalysis Today

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“…A water/organic biphasic system termed thermoregulated phase transfer catalysis (TRPTC) offers an attractive alternative approach which can combine the advantages of homogeneous catalysis for reactivity and heterogeneous catalysis for catalyst recovery [24][25][26][27][28]. In a typical TRPTC process, a suitable organic solvent is necessary as a co-solvent for the efficient aqueous/organic biphasic catalysis.…”

Section: Accepted Manuscriptmentioning

confidence: 99%