Conjugate phosphination of cyclic and acyclic acceptors using Rh(I)–phosphine or Rh(I)–carbene complexes. Probing the mechanism with chirality at the silicon atom or the phosphorus atom of the Si–P reagent

Trepohl, Verena T.; Fröhlich, Roland; Oestreich, Martin

doi:10.1016/j.tet.2009.04.038

Cited by 18 publications

(16 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The ligand 1a-1d was synthesized according to the literature method, 46 and directly used for next procedures. Then the remaining steps to get the catalysts 2a-b and 2d were similar to that of 2c.…”

Section: Synthesis Of Complex 2a 2b and 2dmentioning

confidence: 99%

Efficient copolymerization of ethylene with norbornene or its derivatives using half-metallocene zirconium(iv) catalysts

Yang

Wang

et al. 2016

RSC Adv.

View full text Add to dashboard Cite

A series of half-metallocene zirconium complexes CpZr(thf)Cl 2 [O-2,4-t Bu-6-(P-PhR)C 6 H 2 ] (Cp ¼ C 5 H 5 , 2a:have been synthesized by reacting CpZrCl 3 with the corresponding ligands in THF. All the complexes were characterized by ( 1 H, 13 C and 31 P) NMR spectroscopy as well as elemental analysis. X-ray structural analysis for 2a and 2d revealed a sixcoordinate distorted octahedral geometry around the zirconium center in the solid state. With the activation of a suitable cocatalyst, half-metallocene zirconium complexes 2a-d were employed to catalyze ethylene polymerization and ethylene copolymerization with cycloolefins including norbornene (NBE), 5-ethylidene-2-norbornene (ENB) and 5-vinyl-2-norbornene (VNB). All the complexes exhibited high efficiency toward the copolymerizations. High comonomer incorporations up to 62% (NBE), 76%(ENB) and 40.6% (VNB), respectively, with high catalytic activities above 10 3 kg polymer per mol Zr per h were achieved using catalyst 2c. Steric hindrance and electronic effects of the complexes or the comonomers greatly influence copolymerization behavior. Thus, catalytic activity and copolymer chain structure, including comonomer incorporation and the molecular weight, can be easily tuned over a wide range by changing catalyst and reaction conditions.

show abstract

Section: Synthesis Of Complex 2a 2b and 2dmentioning

confidence: 99%

Efficient copolymerization of ethylene with norbornene or its derivatives using half-metallocene zirconium(iv) catalysts

Yang

Wang

et al. 2016

RSC Adv.

View full text Add to dashboard Cite

show abstract

“…Most research has focused on the use of platinum [ 92 – 96 ], palladium [ 97 – 99 ] or nickel [ 100 – 104 ] complexes. Other catalysts that have been less investigated are iron [ 105 – 107 ], rhodium [ 108 – 110 ], lanthanides [ 111 – 114 ], copper [ 115 ] and alkaline-earth metals [ 114 , 116 ]. The catalyst activates either the P - nucleophile or the C-electrophile.…”

Section: Reviewmentioning

confidence: 99%

Preparation of phosphines through C–P bond formation

Wauters¹,

Debrouwer²,

Stevens³

2014

Beilstein J. Org. Chem.

175

View full text Add to dashboard Cite

show abstract

“…Similar p-allyl intermediates were proposed in Rh-catalyzed conjugate addition of phosphido groups to enones [87][88][89]. Silylphosphine substrates were suggested to generate Rh-phosphido intermediates from a Rh-OH catalyst precursor.…”

Section: Allyl Substratesmentioning

confidence: 59%

Recent Advances in Metal-Catalyzed C–P Bond Formation

Glueck

2010

C-X Bond Formation

159

View full text Add to dashboard Cite

This chapter describes recent advances in metal-catalyzed C-P bond formation, which may be classified into two types of reactions. In hydrophosphination and related processes, P-H groups add across unsaturated C-X (X ¼ C, N, O) bonds. Phosphination of electrophiles typically results in substitution at sp 2 or sp 3 carbon; the P-H group is removed, often by a base. The scope of both nucleophilic and electrophilic partners in these processes is surveyed, and the proposed mechanisms and intermediates in the metal-catalyzed reactions are described.

show abstract

Conjugate phosphination of cyclic and acyclic acceptors using Rh(I)–phosphine or Rh(I)–carbene complexes. Probing the mechanism with chirality at the silicon atom or the phosphorus atom of the Si–P reagent

Cited by 18 publications

References 37 publications

Efficient copolymerization of ethylene with norbornene or its derivatives using half-metallocene zirconium(iv) catalysts

Efficient copolymerization of ethylene with norbornene or its derivatives using half-metallocene zirconium(iv) catalysts

Preparation of phosphines through C–P bond formation

Recent Advances in Metal-Catalyzed C–P Bond Formation

Contact Info

Product

Resources

About