Various approaches to transfers improvement during biphasic catalytic hydroformylation of heavy alkenes

Biphasic aqueous organometallic catalysis promoted by cyclodextrins: Can surface tension measurements explain the efficiency of chemically modified cyclodextrins?

“…In this context, the organometallic catalysis in an aqueous-organic two-phase system appeared as an environmental friendly technique to produce organic compounds [1][2][3][4][5][6]. Cyclodextrins (CDs) have been successfully used as mass-transfer promoters in aqueous-phase organometallic catalysis [7][8][9][10][11][12][13][14][15][16][17][18][19][20]. The beneficial effect of these water-soluble host compounds on the mass transfer was ascribed to their complexing properties and the CD would operate like inverse phase transfer catalyst according to Fig.…”

High‐Pressure 31P{1H} NMR Studies of RhH(CO)(TPPTS)3 in the Presence of Methylated Cyclodextrins: New Light on Rhodium‐Catalyzed Hydroformylation Reaction Assisted by Cyclodextrins

“…Similar results were also reported by Kalck and co-workers on the water-soluble complex [Rh 2 (mStBu) 2 (CO) 2 (TPPTS) 2 ]. [11] As the formation of new species can largely depend on the pressure of CO and H 2 , we decided to reinvestigate the behavior of RhH(CO)(TPPTS) 3 in the presence of cyclodextrin derivatives under pressure of CO and H 2 at the reaction temperature. We report here the effect of randomly methylated a-cyclodextrin (RAME-a-CD), randomly methylated b-cyclodextrin (RAME-b-CD) and randomly methylated g-cyclodextrin (RAME-g-CD) on the RhH(CO)(TPPTS) 3 complex in conditions similar to those of the catalytic experiments [50 atm of CO/H 2 (1/1) and 80 8C].…”

Cleavage of water-insoluble alkylallylcarbonates catalysed by a palladium/TPPTS/cyclodextrin system: effect of phosphine/cyclodextrin interactions on the reaction rate

“…During these last years, considerable advancements have been made in the field of aqueous organometallic catalysis involving water-soluble receptors such as calixarenes [1][2][3][4] and cyclodextrins [5][6][7][8][9][10][11][12][13][14][15][16] as inverse phase transfer catalysts. Indeed, by forming inclusion complexes with water-soluble substrates, these compounds increase notably the solubility of substrates in the aqueous phase containing the catalytic system and, consequently, the reaction rates.…”