Synthesis, characterization and catalytic activity of the water-soluble tungsten complex [W(CO) 3 (MeCN)(TPPMS) 2 ], TPPMS=(C 6 H 5 ) 2 P( m -C 6 H 4 SO 3 Na)·2H 2 O: the unprecedented transformation of the complex into a hybrid (homogeneous/heterogeneous) catalyst precursor during two-phase catalytic hydrogenation upon changes in reaction conditions

Biphasic Hydrogenation of α,β-unsaturated Aldehydes with Hydrosoluble Rhodium and Ruthenium Complexes

“…All gases were of high purity ([99.9%) and were purchased from Aga Gases-Venezuela. [Rh(CO)(Pz)(L)] 2 and [RuH(CO)(-MeCN)(L) 3 ][BF 4 ] (L = TPPMS and TPPTS; Pz = pyrazolate, C 3 H 3 N 2 ) were synthesized according to published methods [11][12][13][14][15]. GC analyses were performed on a Hewlett Packard 5971 Plus Series II chromatograph with a flame ionization detector in an Ultra-1, DB-1 (10% dimethyl polysiloxane), 25 m, 0.32 mm, 0.52 lm column to separate the products.…”

“…Our group has shown a long lasting interest in this kind of systems; we have reported the biphasic hydroformylation and hydrogenation of olefins, olefin mixtures and light naphtha cuts with hydrosoluble rhodium, ruthenium and tungsten complexes [11][12][13][14][15]. In this work we present the biphasic hydrogenation of a,b-unsaturated aldehydes (cinnamaldehyde, a-methyl-cinnamaldehyde, crotonaldehyde and citral) with rhodium and ruthenium hydrosoluble complexes, [Rh(CO)(Pz)(L)] 2 and [RuH(CO)(MeCN)(L) 3 ][BF 4 ] (L = TPPMS and TPPTS) taking particular attention to the recycling of the catalysts.…”

“…In this work we present the biphasic hydrogenation of a,b-unsaturated aldehydes (cinnamaldehyde, a-methyl-cinnamaldehyde, crotonaldehyde and citral) with rhodium and ruthenium hydrosoluble complexes, [Rh(CO)(Pz)(L)] 2 and [RuH(CO)(MeCN)(L) 3 ][BF 4 ] (L = TPPMS and TPPTS) taking particular attention to the recycling of the catalysts. These complexes were chosen due to their ease of preparation, stability, high water solubility and our experience in their use in biphasic systems previously reported [11][12][13][14][15].…”

Rhodium catalyzed aqueous biphasic hydroformylation of naturally occurring allylbenzenes in the presence of water-soluble phosphorus ligands

“…The hydroformylation in aqueous-toluene biphasic systems was performed with [Rh(COD)Cl] 2 or [Rh(CO) 2 (acac)] as catalyst precursors and trisulfonated triphenylphosphine (TPPTS) or the biopolymer HSA (human serum albumin) as the ligands. Some of us have shown a great interest in the biphasic hydrogenation and hydroformylation of olefins and light naphtha cuts with water-soluble rhodium, ruthenium, tungsten and molybdenum precursors [6][7][8][9][10]. Recently, we have shifted our focus towards the functionalization of naturally occurring olefins like allylbenzenes and terpenes, readily available from biomass, in biphasic aqueous media and ionic liquids aiming to obtain high added-value products important in the cosmetic, perfume and pharmaceutical industries [11,12].…”