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Bumraiwha HF, Sterenberg BT. Synthesis of 1,1′‐bisphosphinoferrocenes using electrophilic addition reactions of tungsten coordinated phosphenium ions and phosphine triflates. J Organomet Chem 2022. [DOI: 10.1016/j.jorganchem.2022.122511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Deka H, Fridman N, Koneczny M, Tamm M, Eisen MS. Base-free transfer hydrogenation of aldehydes and ketones catalyzed by imidazolin-2-iminato actinide complexes. Catal Sci Technol 2022. [DOI: 10.1039/d2cy01362b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
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 of aldehydes and ketones with 2-propanol to form the corresponding alcohols.
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Affiliation(s)
- Hemanta Deka
- Schulich Faculty of Chemistry, Technion − Israel Institute of Technology, Technion City, Haifa, 3200008, Israel
| | - Natalia Fridman
- Schulich Faculty of Chemistry, Technion − Israel Institute of Technology, Technion City, Haifa, 3200008, Israel
| | - Marvin Koneczny
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Brauschweig, Germany
| | - Matthias Tamm
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Brauschweig, Germany
| | - Moris S. Eisen
- Schulich Faculty of Chemistry, Technion − Israel Institute of Technology, Technion City, Haifa, 3200008, Israel
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Baldino S, Giboulot S, Lovison D, Nedden HG, Pöthig A, Zanotti-Gerosa A, Zuccaccia D, Ballico M, Baratta W. Preparation of Neutral trans - cis [Ru(O 2CR) 2P 2(NN)], Cationic [Ru(O 2CR)P 2(NN)](O 2CR) and Pincer [Ru(O 2CR)(CNN)P 2] (P = PPh 3, P 2 = diphosphine) Carboxylate Complexes and their Application in the Catalytic Carbonyl Compounds Reduction. Organometallics 2021; 40:1086-1103. [PMID: 34054183 PMCID: PMC8155570 DOI: 10.1021/acs.organomet.1c00059] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Indexed: 11/27/2022]
Abstract
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. The ampy-type derivatives 2 and 3 undergo isomerization to the thermodynamically most stable cationic complexes [Ru(κ1-OAc)(PPh3)2(NN)]OAc (2a and 3a) and cis-[Ru(κ1-OAc)2(PPh3)2(NN)] (2b and 3b) in methanol at RT. The trans-[Ru(κ1-OAc)2(P2)2] (P2 = dppm (4), dppe (5)) compounds have been synthesized from [Ru(κ2-OAc)2(PPh3)2] by reaction with the suitable diphosphine in toluene at 95 °C. The complex cis-[Ru(κ1-OAc)2(dppm)(ampy)](6) has been obtained from [Ru(κ2-OAc)2(PPh3)2] and dppm in toluene at reflux and reaction with ampy. The derivatives trans-[Ru(κ1-OAc)2P2(NN)] (7-16; NN = en, ampy, ampyrim, 8-aminoquinoline; P2 = dppp, dppb, dppf, (R)-BINAP) can be easily synthesized from [Ru(κ2-OAc)2(PPh3)2] with a diphosphine and treatment with the NN ligands at RT. Alternatively these compounds have been prepared from trans-[Ru(OAc)2(PPh3)2(NN)] by reaction with the diphosphine in MEK at 50 °C. The use of (R)-BINAP affords trans-[Ru(κ1-OAc)2((R)-BINAP)(NN)] (NN = ampy (11), ampyrim (15)) isolated as single stereoisomers. Treatment of the ampy-type complexes 8-15 with methanol at RT leads to isomerization to the cationic derivatives [Ru(κ2-OAc)P2(NN)]OAc (8a-15a; NN = ampy, ampyrim; P2 = dppp, dppb, dppf, (R)-BINAP). Similarly to 2, the dipivalate trans-[Ru(κ1-OPiv)2(PPh3)2(ampy)] (18) is prepared from [Ru(κ2-OPiv)2(PPh3)2] (17) and ampy in CHCl3. The pincer acetate [Ru(κ1-OAc)(CNNOMe)(PPh3)2] (19) has been synthesized from [Ru(κ2-OAc)2(PPh3)2] and HCNNOMe ligand in 2-propanol with NEt3 at reflux. In addition, the dppb pincer complexes [Ru(κ1-OAc)(CNN)(dppb)] (CNN = AMTP (20), AMBQPh (21)) have been obtained from [Ru(κ2-OAc)2(PPh3)2], dppb, and HAMTP or HAMBQPh with NEt3, respectively. The acetate NN and pincer complexes are active in transfer hydrogenation with 2-propanol and hydrogenation with H2 of carbonyl compounds at S/C values of up to 10000 and with TOF values of up to 160000 h-1.
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Affiliation(s)
- Salvatore Baldino
- Dipartimento DI4A, Università di Udine, Via del Cotonificio 108, I-33100 Udine, Italy.,Dipartimento di Chimica, Università di Torino, Via Pietro Giuria, 7, I-10125 Torino, Italy
| | - Steven Giboulot
- Dipartimento DI4A, Università di Udine, Via del Cotonificio 108, I-33100 Udine, Italy.,Johnson Matthey, 28 Cambridge Science Park, Milton Road, Cambridge CB4 0FP, United Kingdom
| | - Denise Lovison
- Dipartimento DI4A, Università di Udine, Via del Cotonificio 108, I-33100 Udine, Italy
| | - Hans Günter Nedden
- Johnson Matthey, 28 Cambridge Science Park, Milton Road, Cambridge CB4 0FP, United Kingdom
| | - Alexander Pöthig
- Department of Chemistry & Catalysis Research Center, TUM, Lichtenbergstraße 4, 85747 Garching b. München, Germany
| | - Antonio Zanotti-Gerosa
- Johnson Matthey, 28 Cambridge Science Park, Milton Road, Cambridge CB4 0FP, United Kingdom
| | - Daniele Zuccaccia
- Dipartimento DI4A, Università di Udine, Via del Cotonificio 108, I-33100 Udine, Italy
| | - Maurizio Ballico
- Dipartimento DI4A, Università di Udine, Via del Cotonificio 108, I-33100 Udine, Italy
| | - Walter Baratta
- Dipartimento DI4A, Università di Udine, Via del Cotonificio 108, I-33100 Udine, Italy
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