Synthesis of 1,1′-Bisphosphinoferrocenes Using Electrophilic Addition Reactions of Tungsten Coordinated Phosphenium Ionsand Phosphine Triflates DOI

Hamdi F.K. Bumraiwha,

Brian Sterenberg

SSRN Electronic Journal, Journal Year: 2022, Volume and Issue: unknown

Published: Jan. 1, 2022

Electrophilic aromatic substitution reactions of [W(CO) 5 ]-coordinated phosphine triflates undergo electrophilic with ferrocene. We have used this methodology to add PPh 2 and PPhCl units the 1 1′ position ferrocene form tungsten pentacarbonyl complexes 1,1′-bisdiphenylphosphinoferrocene, 1,1′-bischlorophenylphosphinoferrocene, 1-diphenylphosphine-1′-chlorophenylphosphineferrocene. The chlorophenylphosphinoferrocenes can be converted triflates, further substitutions, allowing us introduce additional ferrocenyl, allyl, alkynyl groups, forming C 10 H 8 Fe(PPh )(PPhR) Fe(PPhR) (R = phenylalkynyl, ferrocenyl).

Language: Английский

Base-free transfer hydrogenation of aldehydes and ketones catalyzed by imidazolin-2-iminato actinide complexes DOI
Hemanta Deka, Natalia Fridman,

Marvin Koneczny

et al.

Catalysis Science & Technology, Journal Year: 2022, Volume and Issue: 13(2), P. 352 - 361

Published: Sept. 21, 2022

A series of thorium and uranium complexes decorated with unsymmetrical imidazolin-2-iminato ligands were found to be effective as catalysts in the transfer hydrogenation aldehydes ketones 2-propanol form corresponding alcohols.

Language: Английский

Citations

7
Preparation of Neutral trans - cis [Ru(O2CR)2P2(NN)], Cationic [Ru(O2CR)P2(NN)](O2CR) and Pincer [Ru(O2CR)(CNN)P2] (P = PPh3, P2 = diphosphine) Carboxylate Complexes and their Application in the Catalytic Carbonyl Compounds Reduction DOI Creative Commons
Salvatore Baldino, Steven Giboulot, Denise Lovison

et al.

Organometallics, Journal Year: 2021, Volume and Issue: 40(8), P. 1086 - 1103

Published: April 14, 2021

The diacetate complexes trans-[Ru(κ1-OAc)2(PPh3)2(NN)] (NN = ethylenediamine (en) (1), 2-(aminomethyl)pyridine (ampy) (2), 2-(aminomethyl)pyrimidine (ampyrim) (3)) have been isolated in 76–88% yield by reaction of [Ru(κ2-OAc)2(PPh3)2] with the corresponding nitrogen ligands. ampy-type derivatives 2 and 3 undergo isomerization to thermodynamically most stable cationic [Ru(κ1-OAc)(PPh3)2(NN)]OAc (2a 3a) cis-[Ru(κ1-OAc)2(PPh3)2(NN)] (2b 3b) methanol at RT. trans-[Ru(κ1-OAc)2(P2)2] (P2 dppm (4), dppe (5)) compounds synthesized from suitable diphosphine toluene 95 °C. complex cis-[Ru(κ1-OAc)2(dppm)(ampy)](6) has obtained reflux ampy. trans-[Ru(κ1-OAc)2P2(NN)] (7–16; NN en, ampy, ampyrim, 8-aminoquinoline; P2 dppp, dppb, dppf, (R)-BINAP) can be easily a treatment ligands Alternatively these prepared trans-[Ru(OAc)2(PPh3)2(NN)] MEK 50 use (R)-BINAP affords trans-[Ru(κ1-OAc)2((R)-BINAP)(NN)] ampy (11), ampyrim (15)) as single stereoisomers. Treatment 8–15 RT leads [Ru(κ2-OAc)P2(NN)]OAc (8a–15a; ampyrim; (R)-BINAP). Similarly 2, dipivalate trans-[Ru(κ1-OPiv)2(PPh3)2(ampy)] (18) is [Ru(κ2-OPiv)2(PPh3)2] (17) CHCl3. pincer acetate [Ru(κ1-OAc)(CNNOMe)(PPh3)2] (19) HCNNOMe ligand 2-propanol NEt3 reflux. In addition, dppb [Ru(κ1-OAc)(CNN)(dppb)] (CNN AMTP (20), AMBQPh (21)) [Ru(κ2-OAc)2(PPh3)2], HAMTP or HAMBQPh NEt3, respectively. are active transfer hydrogenation H2 carbonyl S/C values up 10000 TOF 160000 h–1.

Language: Английский

Citations

9
Piano‐Stool Ruthenium N‐Heterocyclic Carbene Complexes for gem‐Specific Catalytic Dimerization of Terminal Alkynes DOI Creative Commons

Kasumi Hayashi,

Qiuming Liang,

Franka Philippi

et al.

European Journal of Inorganic Chemistry, Journal Year: 2023, Volume and Issue: 26(21)

Published: April 13, 2023

Abstract A series of piano‐stool Ru−NHC (NHC= N ‐heterocyclic carbene) complexes have been prepared and characterized. The NHC ligands used herein varying wingtip groups, showing the impact steric congestion on selectivity for catalytic dimerization terminal alkynes.

Language: Английский

Citations

2
Efficient, Facile, and Green Synthesis of Ruthenium Carboxylate Complexes by Manual Grinding DOI Open Access
Eleonora Aneggi, Daniele Zuccaccia, Andrea Porcheddu

et al.

Processes, Journal Year: 2024, Volume and Issue: 12(7), P. 1413 - 1413

Published: July 6, 2024

Recently, scientists have been developing sustainable processes, and in this context, mechanochemistry is commonly associated with green chemistry for its ability to reduce waste generation from chemical reactions. The well-known acetate complex, diacetate bis(triphenylphosphine) ruthenium(II) [Ru(OAc)2(PPh3)2], a versatile precursor preparing active complexes several catalytic This report presents an efficient straightforward manual grinding protocol the synthesis of ruthenium carboxylate starting commercially available [RuCl2(PPh3)3] metal carboxylates. work represents novel preliminary investigation into precursors’ alternative solventless route based on grinding. To our knowledge, first time [Ru(OAc)2(PPh3)2] has prepared via mechanochemical procedure. method also investigated other alkali carboxylates yields ranging 30 80% were obtained. A comparison sustainability environmental impact between conventional solution carried out using E-factor Mass Productivity. While complex MP only slightly better compared solvent (3 vs. 4 ~6 5 MP), benzoate higher results found (1 ~4 10 MP).

Language: Английский

Citations

0
Synthesis of 1,1′‐bisphosphinoferrocenes using electrophilic addition reactions of tungsten coordinated phosphenium ions and phosphine triflates DOI

Hamdi F.K. Bumraiwha,

B.T. Sterenberg

Journal of Organometallic Chemistry, Journal Year: 2022, Volume and Issue: 980-981, P. 122511 - 122511

Published: Sept. 8, 2022

Language: Английский

Citations

2
[RuCl2(dppf)(PN)]/Pd-cocatalyzed three-component synthesis of 2-pyridinyl-6-arylquinolines DOI
Hao Wang,

P. Bai,

Shuo Wen

et al.

Zeitschrift für Naturforschung B, Journal Year: 2023, Volume and Issue: 78(9-10), P. 461 - 467

Published: Aug. 31, 2023

Abstract A new complex [RuCl 2 (dppf)(PN)] 1 (dppf = 1,1′-bis(diphenylphosphino) ferrocene; PN (2-diphenylphosphino)benzenamine) has been synthesized and characterized. Its structure was determined by single-crystal X-ray diffraction. An efficient /Pd salt-cocatalyzed three-component oxidation/cyclization/Suzuki reaction for the synthesis of 2-pyridinyl-6-arylquinolines from 2-acetylpyridine, (2-amino-5-bromophenyl)methanol, arylboronic acids developed.

Language: Английский

Citations

0
Mononuclear and dinuclear (pyridyl) dicarboxamide Ru(II) hydrido complexes: Ligand controlled coordination diversity and catalytic transfer hydrogenation of ketones DOI Creative Commons
Robert T. Kumah, Stephen O. Ojwach

Journal of Organometallic Chemistry, Journal Year: 2023, Volume and Issue: 1005, P. 122970 - 122970

Published: Nov. 30, 2023

Reactions of ligand N,N-(1,4-phenylene)-dipicolinamide (H2L1), with [Ru(PPh3)3(CO)HCl] produced the dinuclear complex [Ru2(H2L1)(PPh3)4(CO)2H2]2+[2Cl−]− (Ru1). On other hand, treatments N,N-(1,2-phenylene)-dipicolinamide (H2L2), two and one molar equivalents afforded mononuclear complexes [Ru2(HL2)(PPh3)3(CO)3HCl2] (Ru2) [Ru(HL2)(PPh3)2(CO)H] (Ru3) respectively. The identities structures Ru1-Ru3 were established using NMR, FT-IR spectroscopic techniques, mass spectrometry, elemental analyses. displayed high catalytic activities in transfer hydrogenation a wide range ketones. hydride Ru1 was most active, while Ru2 more active than analogous Ru3. 31P NMR analyses reaction intermediates used to propose monohydride pathway reactions involving dissociation PPh3 ligand.

Language: Английский

Citations

0
Synthesis of 1,1′-Bisphosphinoferrocenes Using Electrophilic Addition Reactions of Tungsten Coordinated Phosphenium Ionsand Phosphine Triflates DOI

Hamdi F.K. Bumraiwha,

Brian Sterenberg

SSRN Electronic Journal, Journal Year: 2022, Volume and Issue: unknown

Published: Jan. 1, 2022

Electrophilic aromatic substitution reactions of [W(CO) 5 ]-coordinated phosphine triflates undergo electrophilic with ferrocene. We have used this methodology to add PPh 2 and PPhCl units the 1 1′ position ferrocene form tungsten pentacarbonyl complexes 1,1′-bisdiphenylphosphinoferrocene, 1,1′-bischlorophenylphosphinoferrocene, 1-diphenylphosphine-1′-chlorophenylphosphineferrocene. The chlorophenylphosphinoferrocenes can be converted triflates, further substitutions, allowing us introduce additional ferrocenyl, allyl, alkynyl groups, forming C 10 H 8 Fe(PPh )(PPhR) Fe(PPhR) (R = phenylalkynyl, ferrocenyl).

Language: Английский

Citations

0