Catalytic isomerization of allylic alcohols in water by [RuClCp(PTA)2], [RuClCp(HPTA)2]Cl2·2H2O, [RuCp(DMSO-κS)(PTA)2]Cl, [RuCp(DMSO-κS)(PTA)2](OSO2CF3) and [RuCp(DMSO-κS)(HPTA)2]Cl3·2H2O

Abstract

The new water soluble complexes [RuClCp(HPTA)2]Cl2·2H2O (2), [RuCp(DMSO-κS)(PTA)2]Cl (3), [RuCp(DMSO-κS)(PTA)2](OSO2CF3) (4) and [RuCp(DMSO-κS)(HPTA)2]Cl3·2H2O (5) have been synthesized and fully characterized by NMR, IR and elemental analysis. The structures of complexes 2·2H2O and 5·2H2O were also characterized by single crystal X-ray determination. The catalytic activity of the complexes and [RuClCp(PTA)2] () for the isomerisation in water of 1-octen- to 1-penten-3-ol was assessed and discussed.

Evaluation of catalytic activity of [RuClCp(dmoPTA)(PPh3)](OSO2CF3) in the isomerization of allylic alcohols in water (dmoPTA=3,7-dimethyl-1,3,7-triaza-5-phosphabicyclo[3.3.1]nonane)

“…Our previously published results [6,9] This mechanistic suggestion was supported, among others, by the experimental results disclosed in [6,9] on the substitution of the H 2 O ligand by phosphate. Nevertheless, the presence of chloride in the reaction media produced a clear and significant reduction of the isomerization of 1-octen-3-ol and 1-hepten-3-ol catalysed by 1 (Fig.…”

“…The conversions determined at 1 h (Fig. 5) show that complex 1 displays a different catalytic activity for each of the three allylic alcohols; similar observations were already made for related complexes [6,9]. The conversions at 1 h also show significant dependence on the pH.…”

“…We also shown that -despite of its lower solubility-the catalytic activity of [RuClCp(PTA) 2 ] in isomerization of allylic alcohols is higher than that of the analogous complexes containing mTPPMS and mPTA (mTPPMS = diphenylphosphinobenzene-3-sulfonic acid Na salt) [9]. split ratio), isothermal at 80 ºC and nitrogen as carrier gas at 1 mL/min.…”

“…Previous publications on the catalytic isomerization of allyl alcohols in water showed the significant influence of the pH of the medium on the resulting conversion into the corresponding ketone [6,9]. The isomerization of 1-octen-3-ol catalysed by 1 was studied at pH 6.75 and 2.75 (Fig.…”

Aqueous‐Phase Nitrile Hydration Catalyzed by an In Situ Generated Air‐Stable Ruthenium Catalyst

“…[26,[37][38][39][40][41][42] Protonation of PTAa tt he nitrogen atom leads to an acid with ap K a of 5.7. [26,[37][38][39][40][41][42] Protonation of PTAa tt he nitrogen atom leads to an acid with ap K a of 5.7.…”