A new family of platinum(II) complexes incorporating five‐ and six‐membered cyclic phosphine ligands

Hydroformylation of styrene in the presence of platinum(II) complex catalysts incorporating cyclic phosphines and phosphonous diesters as P-ligands

“…The catalytic precursors 1e3 [26], 4e6 [27], 7 [28e30] and 8 [31e33] were prepared according to procedures published previously. Toluene was distilled under argon from sodium in the presence of benzophenone.…”

Environmentally Friendly Chemistry with Organophosphorus Syntheses in Focus

“…The characteristic 1 J Pt-P couplings in the 31 P NMR spectra confirmed that the platinum complexes (28) incorporating the phospholene moieties in position cis were formed exclusively (Scheme 14) [66,73,78,81,82].…”

“…It is known that the deoxygenation with trichlorosilane or with a mixture of trichlorosilane and pyridine takes place with retention of the P-asymmetric center, so the enantiomeric excess of the optically active borane-and platinum complexes (27* or 28*) was the same, as that in the corresponding starting materials, 3-phospholene oxides ((R)-or (S)-17a-i). The stereostructures of the optically active 3-phospholene platinum complexes (28*) were evaluated by high-level quantum chemical methods [66,73,78,81,82]. Similarly to the 3-phospholene oxides (17a-i), the racemic phenyl-and propyl-phospholane oxides (29a-c), the 5-methyl-4-chloro-1,2,3,6-tetrahydrophosphine oxide (29d) and the 4-dichloromethylene-3,5-dimethyl-1-phenyl- 1,4-dihydrophosphinine oxide (29e) were also converted to the corresponding borane-and cis-platinum complexes (31 and 32) (Scheme 15) [66,78,81].…”

“…The stereostructures of the optically active 3-phospholene platinum complexes (28*) were evaluated by high-level quantum chemical methods [66,73,78,81,82]. Similarly to the 3-phospholene oxides (17a-i), the racemic phenyl-and propyl-phospholane oxides (29a-c), the 5-methyl-4-chloro-1,2,3,6-tetrahydrophosphine oxide (29d) and the 4-dichloromethylene-3,5-dimethyl-1-phenyl- 1,4-dihydrophosphinine oxide (29e) were also converted to the corresponding borane-and cis-platinum complexes (31 and 32) (Scheme 15) [66,78,81]. Recently, our research group investigated and rationalized the possibilities for the deoxygenation of 5-membered P-heterocycles, such as phenylphospholene oxides and phenylphospholane oxides (e.g.…”

Synthesis and use of borane and platinum(II) complexes of 3‐diphenylphosphino‐1‐ phenylphospholane (LuPhos)

“…Heterocyclic P-ligands occurring in Pt(II) complexes, comprise, among others [6][7][8], arylphospholes [9,10], phospholenes [11], phospholanes [11,12], phosphinine (phosphorine) derivatives [11,12], phosphepanes [12], as well as 9-phosphabicyclononanes (Phobanes) [13] and 6-phospha-2,4,8-trioxaadamantanes [14].…”