1
|
Takeda H, Irimajiri M, Mizutani T, Nozawa S, Matsuura Y, Kurosu M, Ishitani O. Photocatalytic CO 2 Reduction Using Mixed Catalytic Systems Comprising an Iron Cation with Bulky Phenanthroline Ligands. Inorg Chem 2024; 63:7343-7355. [PMID: 38598607 DOI: 10.1021/acs.inorgchem.4c00247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/12/2024]
Abstract
This study reports on efficient photocatalytic CO2 reduction reactions using mixed catalytic systems of an Fe ion source and various 1,10-phenanthroline derivatives (R1R2p) as ligands in the presence of triethanolamine (TEOA). As the relatively bulky substituents at positions 2 and 9 of R1R2p weakened the ability to coordinate to the Fe ion, the Fe ion formed TEOA complexes. The free R1R2p accepted an electron from the reduced photosensitizer through proton-coupled electron transfer (PCET) using protons of TEOA dissolved in a CH3CN solution in a CO2 atmosphere as the initial step of the catalytic cycle. Although the mixed system of the nonsubstituted 1,10-phenanthroline generates a stable tris(phenanthroline)-Fe(II) complex in solution, this complex could not function as a CO2 reduction catalyst. The mechanism in which R1R2p interacts with the Fe ion after PCET was proposed for this efficient photocatalytic CO2 reduction. The proposed photocatalytic system using the 2,9-di-sec-butyl-phenanthroline ligand could produce CO with high efficiency (quantum yield of 8.2%) combined with a dinuclear Cu(I) complex as a photosensitizer.
Collapse
Affiliation(s)
- Hiroyuki Takeda
- Division of Molecular Science, Faculty of Science and Technology, Gunma University, 1-5-1 Tenjin, Kiryu, Gunma 376-8515, Japan
| | - Mina Irimajiri
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-1 O-okayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Toshihide Mizutani
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-1 O-okayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Shunsuke Nozawa
- High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
| | - Yuna Matsuura
- Division of Molecular Science, Faculty of Science and Technology, Gunma University, 1-5-1 Tenjin, Kiryu, Gunma 376-8515, Japan
| | - Masao Kurosu
- Division of Molecular Science, Faculty of Science and Technology, Gunma University, 1-5-1 Tenjin, Kiryu, Gunma 376-8515, Japan
| | - Osamu Ishitani
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-1 O-okayama, Meguro-ku, Tokyo 152-8550, Japan
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashihiroshima, Hiroshima 739-8526, Japan
| |
Collapse
|
2
|
Shenderovich IG. Weak, Broken, but Working-Intramolecular Hydrogen Bond in 2,2'-bipyridine. Int J Mol Sci 2023; 24:10390. [PMID: 37373539 DOI: 10.3390/ijms241210390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 06/16/2023] [Accepted: 06/17/2023] [Indexed: 06/29/2023] Open
Abstract
From an academic and practical point of view, it is desirable to be able to assess the possibility of the proton exchange of a given molecular system just by knowing the positions of the proton acceptor and the proton donor. This study addresses the difference between intramolecular hydrogen bonds in 2,2'-bipyridinium and 1,10-phenanthrolinium. Solid-state 15N NMR and model calculations show that these hydrogen bonds are weak; their energies are 25 kJ/mol and 15 kJ/mol, respectively. Neither these hydrogen bonds nor N-H stretches can be responsible for the fast reversible proton transfer observed for 2,2'-bipyridinium in a polar solvent down to 115 K. This process must have been caused by an external force, which was a fluctuating electric field present in the solution. However, these hydrogen bonds are the grain that tips the scales precisely because they are an integral part of a large system of interactions, including both intramolecular interactions and environmental influence.
Collapse
Affiliation(s)
- Ilya G Shenderovich
- Institute of Organic Chemistry, University of Regensburg, 93053 Regensburg, Germany
| |
Collapse
|
3
|
Wang S, Xie C, Zhu Y, Zi G, Zhang Z, Hou G. Enantioselective Synthesis of Chiral Cyclic Hydrazines by Ni-Catalyzed Asymmetric Hydrogenation. Org Lett 2023; 25:3644-3648. [PMID: 37184220 DOI: 10.1021/acs.orglett.3c01009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
An efficient Ni-(S,S)-Ph-BPE complex that catalyzed asymmetric hydrogenation of cyclic N-acyl hydrazones has been developed to produce various chiral cyclic hydrazines in high yields with excellent enantioselectivities of up to >99% enantiomeric excess. Moreover, the hydrogenation can not only proceed smoothly on a gram scale under lower catalyst loading (S/C = 3000) without any decrease of enantioselectivity but can also be applied to the asymmetric synthesis of a RIP-1 kinase inhibitor.
Collapse
Affiliation(s)
- Siwei Wang
- Key Laboratory of Radiopharmaceuticals, College of Chemistry, Beijing Normal University, Beijing 100875, People's Republic of China
| | - Chaochao Xie
- Key Laboratory of Radiopharmaceuticals, College of Chemistry, Beijing Normal University, Beijing 100875, People's Republic of China
| | - Yu Zhu
- Key Laboratory of Radiopharmaceuticals, College of Chemistry, Beijing Normal University, Beijing 100875, People's Republic of China
| | - Guofu Zi
- Key Laboratory of Radiopharmaceuticals, College of Chemistry, Beijing Normal University, Beijing 100875, People's Republic of China
| | - Zhanbin Zhang
- Key Laboratory of Radiopharmaceuticals, College of Chemistry, Beijing Normal University, Beijing 100875, People's Republic of China
| | - Guohua Hou
- Key Laboratory of Radiopharmaceuticals, College of Chemistry, Beijing Normal University, Beijing 100875, People's Republic of China
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| |
Collapse
|
4
|
Hu W, Xiang J, Zhou Q, Gao X. Harnessing Protonated 2,2'-Bipyridinium Salts as Powerful Brønsted Acid Catalysts in Organic Reactions. J Org Chem 2023; 88:4066-4076. [PMID: 36989420 DOI: 10.1021/acs.joc.2c02239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
Abstract
It is the first time that the readily available protonated 2,2'-bipyridinium salts are used as Brønsted acid catalysts to accelerate a series of organic transformations that included the hydration of aromatic alkynes, etherification of alcohols, cyclotrimerization of aliphatic aldehydes, Ritter reaction, Mannich reaction, Biginelli reaction, preparation of substituted alkenes from alcohols, synthesis of spirooxindole, bisindolylmethane, and noncyclized tetraketone with good to excellent yields. These results strongly suggest that there exists enormous potentiality in the development of the protonated 2,2'-bipyridinium catalytic system.
Collapse
Affiliation(s)
- Wen Hu
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, P. R. China
- Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an 710054, China
- Demonstration Center for Experimental Chemistry Education, Chongqing University, Chongqing 400044, China
| | - Jiaqi Xiang
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, P. R. China
| | - Qi Zhou
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, P. R. China
| | - Xinyu Gao
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, P. R. China
| |
Collapse
|
5
|
Olivieri D, Tarroni R, Zacchini S, Della Ca' N, Mancuso R, Gabriele B, Spadoni G, Carfagna C. Regioselective one-step alkoxy-aryloxycarbonylation of alkenes. J Catal 2023. [DOI: 10.1016/j.jcat.2023.03.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
|
6
|
Ganesan V, Moon S, Yoon S. Heterogenized Phenanthroline-Pd (2+)-Catalyzed Alkoxycarbonylation of Aryl Iodides in Base-Free Conditions. J Org Chem 2023; 88:5127-5134. [PMID: 36649592 DOI: 10.1021/acs.joc.2c02359] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
A phenanthroline-based porous organic polymer-supported heterogeneous Pd catalyst (Pd@Phen-POP) is facilely synthesized by the solvent knitting of a Phen scaffold via the Lewis-acid-catalyzed Friedel-Crafts reaction using dichloromethane as a source for linker in the presence of AlCl3. The catalyst very effectively catalyzes the alkoxycarbonylation of various substituted aryl iodides with various alcohols to give corresponding products in good to excellent yields. Owing to the heterotic nature of the catalyst, it can be easily separated by simple filtration from the reaction mixture and recycled.
Collapse
Affiliation(s)
- Vinothkumar Ganesan
- Department of Chemistry, Chung-Ang University, Dongjak-gu, Seoul 06974, Republic of Korea
| | - Seokyeong Moon
- Department of Chemistry, Chung-Ang University, Dongjak-gu, Seoul 06974, Republic of Korea
| | - Sungho Yoon
- Department of Chemistry, Chung-Ang University, Dongjak-gu, Seoul 06974, Republic of Korea
| |
Collapse
|
7
|
Bie Z, Yao Z, Jie S, Hu J, Pei L, Li BG, Wang P, Wang Z. Activation of a Palladium-Based Catalyst by Hexafluoroisopropanol for Polyketone Synthesis via Homogeneous Solution Polymerization. Ind Eng Chem Res 2023. [DOI: 10.1021/acs.iecr.2c02927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Zhengwei Bie
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Zhen Yao
- Institute of Polymer and Polymerization Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Suyun Jie
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Jijiang Hu
- Institute of Polymer and Polymerization Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Lijun Pei
- Chambroad Chemical Industry Research Institute Company Limited, Binzhou 256500, Shandong Province, China
| | - Bo-Geng Li
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Pengpeng Wang
- Chambroad Chemical Industry Research Institute Company Limited, Binzhou 256500, Shandong Province, China
| | - Zong Wang
- Chambroad Chemical Industry Research Institute Company Limited, Binzhou 256500, Shandong Province, China
| |
Collapse
|
8
|
Schreiber E, Brennessel WW, Matson EM. Charge-State Dependence of Proton Uptake in Polyoxovanadate-alkoxide Clusters. Inorg Chem 2022; 61:4789-4800. [PMID: 35293218 PMCID: PMC8965876 DOI: 10.1021/acs.inorgchem.1c02937] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
Here, we present
an investigation of the thermochemistry of proton
uptake in acetonitrile across three charge states of a polyoxovanadate-alkoxide
(POV-alkoxide) cluster, [V6O7(OMe)12]n (n = 2–, 1–,
and 0). The vanadium oxide assembly studied features bridging sites
saturated by methoxide ligands, isolating protonation to terminal
vanadyl moieties. Exposure of [V6O7(OMe)12]n to organic acids of appropriate
strength results in the protonation of a terminal V=O bond,
generating the transient hydroxide-substituted POV-alkoxide cluster
[V6O6(OH)(OMe)12]n+1. Evidence for this intermediate proved elusive in our initial
report, but here we present the isolation of a divalent anionic cluster
that features hydrogen bonding to dimethylammonium at the terminal
oxo site. Degradation of the protonated species results in the formation
of equimolar quantities of one-electron-oxidized and oxygen-atom-efficient
complexes, [V6O7(OMe)12]n+1 and [V6O6(OMe)12]n+1. While analogous reactivity was
observed across the three charge states of the cluster, a dependence
on the acid strength was observed, suggesting that the oxidation state
of the vanadium oxide assembly influences the basicity of the cluster
surface. Spectroscopic investigations reveal sigmoidal relationships
between the acid strength and cluster conversion across the redox
series, allowing for determination of the proton affinity of the surface
of the cluster in all three charge states. The fully reduced cluster
is found to be the most basic, with higher oxidation states of the
assembly possessing substantially reduced proton affinities (∼7
pKa units per electron). These results
further our understanding of the site-specific reactivity of terminal M=O bonds with protons in an organic solvent,
revealing design criteria for engineering functional surfaces of metal
oxide materials of relevance to energy storage and conversion. Experimental determination of the surface
basicity of polyoxovanadate-alkoxide
clusters across three oxidation states reveals a charge-state dependence
of proton uptake in molecular, organofunctionalized vanadium oxide
assemblies.
Collapse
Affiliation(s)
- Eric Schreiber
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - William W Brennessel
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - Ellen M Matson
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| |
Collapse
|
9
|
Alberoni C, D’Alterio MC, Balducci G, Immirzi B, Polentarutti M, Pellecchia C, Milani B. Tunable “In-Chain” and “At the End of the Branches” Methyl Acrylate Incorporation in the Polyolefin Skeleton through Pd(II) Catalysis. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05326] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Chiara Alberoni
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy
| | - Massimo C. D’Alterio
- Dipartimento di Chimica e Biologia ″A. Zambelli″, Università di Salerno, via Giovanni Paolo II 132, I-84084 Fisciano, SA, Italy
| | - Gabriele Balducci
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy
| | - Barbara Immirzi
- Istituto per i Polimeri, Compositi e Biomateriali, Consiglio Nazionale delle Ricerche, Via Campi Flegrei 34, 80078 Pozzuoli, NA, Italy
| | - Maurizio Polentarutti
- Elettra − Sincrotrone Trieste, S.S. 14 Km 163.5 in Area Science Park, Basovizza, Trieste 34149, Italy
| | - Claudio Pellecchia
- Dipartimento di Chimica e Biologia ″A. Zambelli″, Università di Salerno, via Giovanni Paolo II 132, I-84084 Fisciano, SA, Italy
| | - Barbara Milani
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy
| |
Collapse
|
10
|
Olivieri D, Tarroni R, Della Ca' N, Mancuso R, Gabriele B, Spadoni G, Carfagna C. Combined Effect of Palladium Catalyst and the Alcohol to Promote the Uncommon Bis‐Alkoxycarbonylation of Allylic Substrates. ChemCatChem 2022. [DOI: 10.1002/cctc.202101923] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Diego Olivieri
- Department of Industrial Chemistry “T. Montanari” University of Bologna Viale Risorgimento 4 40136 Bologna (BO) Italy
- Department of Biomolecular Sciences University of Urbino “Carlo Bo” Piazza Rinascimento 6 61029 Urbino (PU) Italy
| | - Riccardo Tarroni
- Department of Industrial Chemistry “T. Montanari” University of Bologna Viale Risorgimento 4 40136 Bologna (BO) Italy
| | - Nicola Della Ca'
- Department of Chemistry Life Sciences and Environmental Sustainability (SCVSA) University of Parma Parco Area delle Scienze 17 A 43124 Parma (PR) Italy
| | - Raffaella Mancuso
- Department of Chemistry and Chemical Technologies Laboratory of Industrial and Synthetic Organic Chemistry (LISOC) University of Calabria Via P. Bucci 12/C 87036 Arcavacata di Rende (CS) Italy
| | - Bartolo Gabriele
- Department of Chemistry and Chemical Technologies Laboratory of Industrial and Synthetic Organic Chemistry (LISOC) University of Calabria Via P. Bucci 12/C 87036 Arcavacata di Rende (CS) Italy
| | - Gilberto Spadoni
- Department of Biomolecular Sciences University of Urbino “Carlo Bo” Piazza Rinascimento 6 61029 Urbino (PU) Italy
| | - Carla Carfagna
- Department of Industrial Chemistry “T. Montanari” University of Bologna Viale Risorgimento 4 40136 Bologna (BO) Italy
| |
Collapse
|
11
|
Alternating copolymerization of carbon monoxide and vinyl arenes using [N,N] bidentate palladium catalysts. JOURNAL OF POLYMER SCIENCE 2022. [DOI: 10.1002/pol.20210802] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
|
12
|
4,4′-Di-tert-butyl-2,2′-bipyridinium Trifluoromethanesulfonate. MOLBANK 2021. [DOI: 10.3390/m1261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
4,4′-Di-tert-butyl-2,2′-bipyridinium trifluoromethanesulfonate was synthesized by stirring 4,4′-Di-tert-butyl-2,2′-bipyridine with scandium(III) trifluoromethanesulfonate in acetonitrile, followed by precipitation with diethyl ether. The structure of the new compound was characterized by FT-IR, 1H, 13C{1H} and 19F{1H} NMR spectroscopy and CHN elemental analysis. This is a safe and simple method to obtain mono-protonated bipyridinium trifluoromethanesulfonate without the direct use of trifluoromethanesulfonic acid.
Collapse
|
13
|
Li B, Liu D, Hu Y, Chen J, Zhang Z, Zhang W. Nickel‐Catalyzed Asymmetric Hydrogenation of Hydrazones. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100642] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Bowen Li
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs Frontiers Science Center for Transformative Molecules School of Chemistry and Chemical Engineering Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 P. R. China
| | - Dan Liu
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs Frontiers Science Center for Transformative Molecules School of Chemistry and Chemical Engineering Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 P. R. China
| | - Yanhua Hu
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs Frontiers Science Center for Transformative Molecules School of Chemistry and Chemical Engineering Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 P. R. China
| | - Jianzhong Chen
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs Frontiers Science Center for Transformative Molecules School of Chemistry and Chemical Engineering Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 P. R. China
| | - Zhenfeng Zhang
- School of Pharmacy Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 R. China
| | - Wanbin Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs Frontiers Science Center for Transformative Molecules School of Chemistry and Chemical Engineering Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 P. R. China
- School of Pharmacy Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 R. China
- College of Chemistry Zhengzhou University 75 Daxue Road Zhengzhou 450052 P. R. China
| |
Collapse
|
14
|
Xiao Z, Zhong L, Du C, Du W, Zheng H, Cheung CS, Wang L, Gao H. Unprecedented Steric and Positioning Effects of Comonomer Substituents on α-Diimine Palladium-Catalyzed Vinyl Arene/CO Copolymerization. Macromolecules 2021. [DOI: 10.1021/acs.macromol.0c02227] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Zefan Xiao
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Liu Zhong
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Cheng Du
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Wenbo Du
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Handou Zheng
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Chi Shing Cheung
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Lingzhi Wang
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Haiyang Gao
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| |
Collapse
|
15
|
Bruns DL, Musaev DG, Stahl SS. Can Donor Ligands Make Pd(OAc) 2 a Stronger Oxidant? Access to Elusive Palladium(II) Reduction Potentials and Effects of Ancillary Ligands via Palladium(II)/Hydroquinone Redox Equilibria. J Am Chem Soc 2020; 142:19678-19688. [PMID: 33167610 DOI: 10.1021/jacs.0c09464] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Palladium(II)-catalyzed oxidation reactions represent an important class of methods for selective modification and functionalization of organic molecules. This field has benefitted greatly from the discovery of ancillary ligands that expand the scope, reactivity, and selectivity in these reactions; however, ancillary ligands also commonly poison these reactions. The different influences of ligands in these reactions remain poorly understood. For example, over the 60-year history of this field, the PdII/0 redox potentials for catalytically relevant Pd complexes have never been determined. Here, we report the unexpected discovery of (L)PdII(OAc)2-mediated oxidation of hydroquinones, the microscopic reverse of quinone-mediated oxidation of Pd0 commonly employed in PdII-catalyzed oxidation reactions. Analysis of redox equilibria arising from the reaction of (L)Pd(OAc)2 and hydroquinones (L = bathocuproine, 4,5-diazafluoren-9-one), generating reduced (L)Pd species and benzoquinones, provides the basis for determination of (L)PdII(OAc)2 reduction potentials. Experimental results are complemented by density functional theory calculations to show how a series of nitrogen-based ligands modulate the (L)PdII(OAc)2 reduction potential, thereby tuning the ability of PdII to serve as an effective oxidant of organic molecules in catalytic reactions.
Collapse
Affiliation(s)
- David L Bruns
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue Madison, Wisconsin 53706, United States
| | - Djamaladdin G Musaev
- Cherry L. Emerson Center for Scientific Computation and Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Shannon S Stahl
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue Madison, Wisconsin 53706, United States
| |
Collapse
|
16
|
Temkin ON. Oxidation of Olefins to Carbonyl Compounds: Modern View of the Classical Reaction. KINETICS AND CATALYSIS 2020. [DOI: 10.1134/s0023158420050122] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
|
17
|
Dall’Anese A, Fiorindo M, Olivieri D, Carfagna C, Balducci G, Alessio E, Durand J, Milani B. Pd-Catalyzed CO/Vinyl Arene Copolymerization: when the Stereochemistry is Controlled by the Comonomer. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c01461] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Anna Dall’Anese
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy
| | - Mattia Fiorindo
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy
| | - Diego Olivieri
- Department of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, 40136 Bologna, Italy
| | - Carla Carfagna
- Department of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, 40136 Bologna, Italy
| | - Gabriele Balducci
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy
| | - Enzo Alessio
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy
| | - Jérôme Durand
- Laboratoire de Chimie de Coordination UPR CNRS 8241, composante ENSIACET, Université de Toulouse, 4 Allée Emile Monso-CS 44362, 31030 Toulouse, Cedex 4, France
| | - Barbara Milani
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy
| |
Collapse
|
18
|
Scarpi-Luttenauer M, Geminiani L, Lebrun P, Kyritsakas N, Chaumont A, Henry M, Mobian P. Bent 1,10-Phenanthroline Ligands within Octahedral Complexes Constructed around a TiO 4N 2 Core. Inorg Chem 2020; 59:12005-12016. [PMID: 32805984 DOI: 10.1021/acs.inorgchem.0c00915] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The synthesis of monomeric octahedral complexes constructed around a TiO4N2 core bearing neocuproine derivatives is detailed. These architectures follow the [Ti(1)2(N-N)] general formulas, where 1 is the 6,6'-diphenyl-2,2'-biphenolato ligand and N-N is a 1,10-phenanthroline derivative. Single-crystal analysis revealed that the neocuproine-based ligands within these architectures adopt a nonplanar geometry. The distortion of these aromatic diimine systems has been quantified through measurement of a torsion angle (α) and a dihedral angle (β) defined by two planes within the aromatic diimine molecule (π1 and π2), permitting one to evaluate the twisting and bending of a coordinated nitrogen ligand, respectively. Next, the scope of this investigation was extended to the synthesis of a dimeric architecture, [Ti2(1)4(3)], where 3 is the 5,5'-bis(neocuproine) ligand. Again, a strong distortion of the neocuproine fragments was characterized in the crystalline state for such a complex. The UV-visible properties of these complexes were interpreted with the help of time-dependent density functional theory calculations. The solution behavior as well as good hydrolytic stability of these species has been established.
Collapse
Affiliation(s)
- Matthieu Scarpi-Luttenauer
- Laboratoire de Chimie Moléculaire de l'Etat Solide, UMR 7140, UDS-CNRS, Université de Strasbourg, 4 rue Blaise Pascal, F-67000 Strasbourg, France
| | - Loris Geminiani
- Laboratoire de Chimie Moléculaire de l'Etat Solide, UMR 7140, UDS-CNRS, Université de Strasbourg, 4 rue Blaise Pascal, F-67000 Strasbourg, France
| | - Pauline Lebrun
- Laboratoire de Chimie Moléculaire de l'Etat Solide, UMR 7140, UDS-CNRS, Université de Strasbourg, 4 rue Blaise Pascal, F-67000 Strasbourg, France
| | - Nathalie Kyritsakas
- Laboratoire de Tectonique Moléculaire, UMR 7140, UDS-CNRS, Université de Strasbourg, 4 rue Blaise Pascal, F-67000 Strasbourg, France
| | - Alain Chaumont
- Laboratoire de Modélisation et Simulations Moléculaires, UMR 7140, UDS-CNRS, Université de Strasbourg, 4 rue Blaise Pascal, F-67000 Strasbourg, France
| | - Marc Henry
- Laboratoire de Chimie Moléculaire de l'Etat Solide, UMR 7140, UDS-CNRS, Université de Strasbourg, 4 rue Blaise Pascal, F-67000 Strasbourg, France
| | - Pierre Mobian
- Laboratoire de Chimie Moléculaire de l'Etat Solide, UMR 7140, UDS-CNRS, Université de Strasbourg, 4 rue Blaise Pascal, F-67000 Strasbourg, France
| |
Collapse
|
19
|
An effective non-chromatographic method for the purification of phenanthrolines and related ligands. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
20
|
Hu QL, Hou KQ, Li J, Ge Y, Song ZD, Chan ASC, Xiong XF. Silanol: a bifunctional group for peptide synthesis and late-stage functionalization. Chem Sci 2020; 11:6070-6074. [PMID: 34094099 PMCID: PMC8159358 DOI: 10.1039/d0sc02439b] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 05/24/2020] [Indexed: 12/27/2022] Open
Abstract
Chemical modification of a specific amino acid residue on peptides represents an efficient strategy to improve their pharmacokinetics and facilitates the potential to achieve post-synthetic diversification of peptides. Herein, we reported the first Pd-catalyzed late-stage ortho-olefination of Tyr residues on peptides with high chemo- and site-selectivity, by employing the easily attached and removable silanol as a bifunctional protecting group and directing group. Up to hexapeptides with variation on amino acid sequences or locations of the Tyr residue and different olefins were compatible with this protocol, which enriched the chemical toolbox for late-stage modification via C(sp2)-H functionalization. Furthermore, the orthogonal protection strategies of Tyr were also developed and could be applied to SPPS.
Collapse
Affiliation(s)
- Qi-Long Hu
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University 510006 Guangzhou Guangdong P. R. China
| | - Ke-Qiang Hou
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University 510006 Guangzhou Guangdong P. R. China
| | - Jian Li
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University 510006 Guangzhou Guangdong P. R. China
| | - Yang Ge
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University 510006 Guangzhou Guangdong P. R. China
| | - Zhen-Dong Song
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University 510006 Guangzhou Guangdong P. R. China
| | - Albert S C Chan
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University 510006 Guangzhou Guangdong P. R. China
| | - Xiao-Feng Xiong
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University 510006 Guangzhou Guangdong P. R. China
| |
Collapse
|
21
|
2,4-Disubstituted 4-(1,3-thiazol-5-yl)but-3-en-2-ones: synthetic approaches to and consequent chemical modification. MONATSHEFTE FUR CHEMIE 2020. [DOI: 10.1007/s00706-020-02612-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
|
22
|
Mealli C, Manca G, Tarroni R, Olivieri D, Carfagna C. Computational Overview of a Pd-Catalyzed Olefin Bis-alkoxycarbonylation Process. Organometallics 2020. [DOI: 10.1021/acs.organomet.9b00798] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Carlo Mealli
- Istituto di Chimica dei Composti OrganoMetallici, CNR-ICCOM, Via Madonna del Piano 10, I-50019 Sesto Fiorentino, Italy
| | - Gabriele Manca
- Istituto di Chimica dei Composti OrganoMetallici, CNR-ICCOM, Via Madonna del Piano 10, I-50019 Sesto Fiorentino, Italy
| | - Riccardo Tarroni
- Department of Industrial Chemistry “T. Montanari”, University of Bologna, Viale Risorgimento 4, 40136 Bologna, Italy
| | - Diego Olivieri
- Department of Industrial Chemistry “T. Montanari”, University of Bologna, Viale Risorgimento 4, 40136 Bologna, Italy
| | - Carla Carfagna
- Department of Industrial Chemistry “T. Montanari”, University of Bologna, Viale Risorgimento 4, 40136 Bologna, Italy
| |
Collapse
|
23
|
The Early Years of 2,2'-Bipyridine-A Ligand in Its Own Lifetime. Molecules 2019; 24:molecules24213951. [PMID: 31683694 PMCID: PMC6864536 DOI: 10.3390/molecules24213951] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2019] [Revised: 10/27/2019] [Accepted: 10/29/2019] [Indexed: 11/17/2022] Open
Abstract
The first fifty years of the chemistry of 2,2′-bipyridine are reviewed from its first discovery in 1888 to the outbreak of the second global conflict in 1939. The coordination chemistry and analytical applications are described and placed in the context of the increasingly sophisticated methods of characterization which became available to the chemist in this time period. Many of the “simple” complexes of 2,2′-bipyridine reported in the early literature have been subsequently shown to have more complex structures.
Collapse
|
24
|
Olivieri D, Tarroni R, Della Ca' N, Mancuso R, Gabriele B, Spadoni G, Carfagna C. Bis‐Alkoxycarbonylation of Acrylic Esters and Amides for the Synthesis of 2‐Alkoxycarbonyl or 2‐Carbamoyl Succinates. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900918] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Diego Olivieri
- Department of Industrial Chemistry “T. Montanari” University of Bologna Viale Risorgimento 4 40136 Bologna (BO) Italy
| | - Riccardo Tarroni
- Department of Industrial Chemistry “T. Montanari” University of Bologna Viale Risorgimento 4 40136 Bologna (BO) Italy
| | - Nicola Della Ca'
- Department of Chemistry, Life Sciences and Environmental Sustainability (SCVSA) University of Parma Parco Area delle Scienze 17A 43124 Parma Italy
| | - Raffaella Mancuso
- Department of Chemistry and Chemical Technologies University of Calabria Via P. Bucci 12/C 87036 Arcavacata di Rende (CS) Italy
| | - Bartolo Gabriele
- Department of Chemistry and Chemical Technologies University of Calabria Via P. Bucci 12/C 87036 Arcavacata di Rende (CS) Italy
| | - Gilberto Spadoni
- Department of Biomolecular Sciences University of Urbino “Carlo Bo” Piazza Rinascimento 6 61029 Urbino (PU) Italy
| | - Carla Carfagna
- Department of Industrial Chemistry “T. Montanari” University of Bologna Viale Risorgimento 4 40136 Bologna (BO) Italy
| |
Collapse
|
25
|
Mertens RT, Kim JH, Jennings WC, Parkin S, Awuah SG. Revisiting the reactivity of tetrachloroauric acid with N,N-bidentate ligands: structural and spectroscopic insights. Dalton Trans 2019; 48:2093-2099. [PMID: 30657507 DOI: 10.1039/c8dt04960b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The reactivity of tetrachloroauric acid (HAuCl4) with readily accessible bidentate N-donor ligands affords N,N-ligated Au(iii) center complexes. These compounds are useful precursors of stable catalysts, anticancer agents, and building blocks for materials. This report provides detailed insight into intermediates, equilibria, the counter anion effect, and structural variability, using spectroscopy, crystallography and computational tools. Novel mixed-valence Au(i) and Au(iii) complexes [Au(o-phen)Cl2]2[AuCl2][AuCl4] and [Au(o-phen)Cl2][AuCl2] having AuCl2- and AuCl4- anions linearly arranged in the axial sites of the square-planar Au(o-phen)Cl2 cation were discovered. Other competing side products of the reaction studied revealed protonated N,N-bidentate ligands with AuCl4- anions. Quantitative variable temperature NMR studies reveal that for a mixture of target Au(iii) salt and the protonated ligand, the reaction favors the irreversible formation of the side product. Using a rapid (30 min) temperature controlled protocol, the desired coordinated species is accessible in respectable yields while avoiding side products.
Collapse
Affiliation(s)
- R Tyler Mertens
- Department of Chemistry, University of Kentucky, 505 Rose Street, Lexington, Kentucky 40506, USA.
| | | | | | | | | |
Collapse
|
26
|
Xiao Z, Zheng H, Du C, Zhong L, Liao H, Gao J, Gao H, Wu Q. Enhancement on Alternating Copolymerization of Carbon Monoxide and Styrene by Dibenzobarrelene-Based α-Diimine Palladium Catalysts. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b01786] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Zefan Xiao
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Handou Zheng
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Cheng Du
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Liu Zhong
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Heng Liao
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Jie Gao
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Haiyang Gao
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Qing Wu
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| |
Collapse
|
27
|
Rosar V, Meduri A, Montini T, Fornasiero P, Zangrando E, Milani B. The contradictory effect of the methoxy-substituent in palladium-catalyzed ethylene/methyl acrylate cooligomerization. Dalton Trans 2018; 47:2778-2790. [DOI: 10.1039/c7dt04465h] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three new α-diimines bearing at least one methoxy group on one aryl ring were investigated. The introduction of the methoxy substituent on the ancillary ligand had a remarkable effect on the catalytic performances of the relevant palladium complexes.
Collapse
Affiliation(s)
- V. Rosar
- Department of Chemical and Pharmaceutical Sciences
- University of Trieste
- 34127 Trieste
- Italy
- Consorzio Interuniversitario per la Reattività Chimica e la Catalisi CIRCC
| | - A. Meduri
- Department of Chemical and Pharmaceutical Sciences
- University of Trieste
- 34127 Trieste
- Italy
| | - T. Montini
- Department of Chemical and Pharmaceutical Sciences
- University of Trieste
- 34127 Trieste
- Italy
- National Interuniversity Consortium of Materials Science and Technology (INSTM) Trieste Research Unit and ICCOM-CNR Trieste Research Unit
| | - P. Fornasiero
- Department of Chemical and Pharmaceutical Sciences
- University of Trieste
- 34127 Trieste
- Italy
- National Interuniversity Consortium of Materials Science and Technology (INSTM) Trieste Research Unit and ICCOM-CNR Trieste Research Unit
| | - E. Zangrando
- Department of Chemical and Pharmaceutical Sciences
- University of Trieste
- 34127 Trieste
- Italy
| | - B. Milani
- Department of Chemical and Pharmaceutical Sciences
- University of Trieste
- 34127 Trieste
- Italy
| |
Collapse
|
28
|
Rosar V, Montini T, Balducci G, Zangrando E, Fornasiero P, Milani B. Palladium-Catalyzed Ethylene/Methyl Acrylate Co-Oligomerization: The Effect of a New Nonsymmetrical α-Diimine with the 1,4-Diazabutadiene Skeleton. ChemCatChem 2017. [DOI: 10.1002/cctc.201700504] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Vera Rosar
- Department of Chemical and Pharmaceutical Sciences; University of Trieste; Via Licio Giorgieri 1 34127 Trieste Italy
- Consorzio Interuniversitario per la Reattività Chimica e la Catalisi CIRCC; Via Celso Ulpiani 27 70126 Bari Italy
| | - Tiziano Montini
- Department of Chemical and Pharmaceutical Sciences; University of Trieste; Via Licio Giorgieri 1 34127 Trieste Italy
- ICCOM-CNR and INSTM Trieste; Via Licio Giorgieri 1 34127 Trieste Italy
| | - Gabriele Balducci
- Department of Chemical and Pharmaceutical Sciences; University of Trieste; Via Licio Giorgieri 1 34127 Trieste Italy
| | - Ennio Zangrando
- Department of Chemical and Pharmaceutical Sciences; University of Trieste; Via Licio Giorgieri 1 34127 Trieste Italy
| | - Paolo Fornasiero
- Department of Chemical and Pharmaceutical Sciences; University of Trieste; Via Licio Giorgieri 1 34127 Trieste Italy
- ICCOM-CNR and INSTM Trieste; Via Licio Giorgieri 1 34127 Trieste Italy
| | - Barbara Milani
- Department of Chemical and Pharmaceutical Sciences; University of Trieste; Via Licio Giorgieri 1 34127 Trieste Italy
| |
Collapse
|
29
|
Abstract
Although in the title salt, C10H9N2+·CF3SO3−, the C—C and C—N bond lengths within the aromatic rings are normal, there is a considerable difference in the C—N—C angles at the protonated and unprotonated N atoms,viz. 123.42 (10) and 117.10 (11)°, respectively. Bifurcated N—H...X(X= N or O) hydrogen bonds form within the cation and between cation and anion. As a result, the cation exists in acisconformation in the solid state. An obvious π–π contact is also present between the non-protonated pyridyl rings of neighbouring cations.
Collapse
|
30
|
Lévesque É, Bechara WS, Constantineau-Forget L, Pelletier G, Rachel NM, Pelletier JN, Charette AB. General C-H Arylation Strategy for the Synthesis of Tunable Visible Light-Emitting Benzo[a]imidazo[2,1,5-c,d]indolizine Fluorophores. J Org Chem 2017; 82:5046-5067. [PMID: 28441020 DOI: 10.1021/acs.joc.6b02928] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Herein we report the discovery of the benzo[a]imidazo[2,1,5-c,d]indolizine motif displaying tunable emission covering most of the visible spectrum. The polycyclic core is obtained from readily available amides via a chemoselective process involving Tf2O-mediated amide cyclodehydration, followed by intramolecular C-H arylation. Additionally, these fluorescent heterocycles are easily functionalized using electrophilic reagents, enabling divergent access to varied substitution. The effects of said substitution on the compounds' photophysical properties were rationalized by density functional theory calculations. For some compounds, emission wavelengths are directly correlated to the substituent's Hammett constants. Easily introduced nonconjugated reactive functional groups allow the labeling of biomolecules without modification of emissive properties. This work provides a straightforward platform for the synthesis of new moderately bright fluorescent dyes remarkable for their chemical stability, predictability, and unusually high excitation-emission differential.
Collapse
Affiliation(s)
- Éric Lévesque
- Centre in Green Chemistry and Catalysis, Faculty of Arts and Sciences, Department of Chemistry, Université de Montréal , P.O. Box 6128, Station Downtown, Montréal, Québec H3C 3J7, Canada
| | - William S Bechara
- Centre in Green Chemistry and Catalysis, Faculty of Arts and Sciences, Department of Chemistry, Université de Montréal , P.O. Box 6128, Station Downtown, Montréal, Québec H3C 3J7, Canada
| | - Léa Constantineau-Forget
- Centre in Green Chemistry and Catalysis, Faculty of Arts and Sciences, Department of Chemistry, Université de Montréal , P.O. Box 6128, Station Downtown, Montréal, Québec H3C 3J7, Canada
| | - Guillaume Pelletier
- Centre in Green Chemistry and Catalysis, Faculty of Arts and Sciences, Department of Chemistry, Université de Montréal , P.O. Box 6128, Station Downtown, Montréal, Québec H3C 3J7, Canada
| | - Natalie M Rachel
- Centre in Green Chemistry and Catalysis, Faculty of Arts and Sciences, Department of Chemistry, Université de Montréal , P.O. Box 6128, Station Downtown, Montréal, Québec H3C 3J7, Canada
| | - Joelle N Pelletier
- Centre in Green Chemistry and Catalysis, Faculty of Arts and Sciences, Department of Chemistry, Université de Montréal , P.O. Box 6128, Station Downtown, Montréal, Québec H3C 3J7, Canada
| | - André B Charette
- Centre in Green Chemistry and Catalysis, Faculty of Arts and Sciences, Department of Chemistry, Université de Montréal , P.O. Box 6128, Station Downtown, Montréal, Québec H3C 3J7, Canada
| |
Collapse
|
31
|
Van Raden JM, Louie S, Zakharov LN, Jasti R. 2,2′-Bipyridyl-Embedded Cycloparaphenylenes as a General Strategy To Investigate Nanohoop-Based Coordination Complexes. J Am Chem Soc 2017; 139:2936-2939. [DOI: 10.1021/jacs.7b00359] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Jeff M. Van Raden
- Department
of Chemistry and Biochemistry and Materials Science Institute, University of Oregon, Eugene, Oregon 97403, United States
| | - Shayan Louie
- Department
of Chemistry and Biochemistry and Materials Science Institute, University of Oregon, Eugene, Oregon 97403, United States
| | - Lev N. Zakharov
- CAMCOR
− Center for Advanced Materials Characterization in Oregon, University of Oregon, Eugene, Oregon 97403, United States
| | - Ramesh Jasti
- Department
of Chemistry and Biochemistry and Materials Science Institute, University of Oregon, Eugene, Oregon 97403, United States
| |
Collapse
|
32
|
Régnier S, Bechara WS, Charette AB. Synthesis of 3-Aminoimidazo[1,2-a]pyridines from α-Aminopyridinyl Amides. J Org Chem 2016; 81:10348-10356. [DOI: 10.1021/acs.joc.6b01324] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Sophie Régnier
- Centre in Green Chemistry
and Catalysis, Department of Chemistry, University of Montreal, P.O. Box 6128, Station Downtown, Montreal, Quebec H3C 3J7, Canada
| | - William S. Bechara
- Centre in Green Chemistry
and Catalysis, Department of Chemistry, University of Montreal, P.O. Box 6128, Station Downtown, Montreal, Quebec H3C 3J7, Canada
| | - André B. Charette
- Centre in Green Chemistry
and Catalysis, Department of Chemistry, University of Montreal, P.O. Box 6128, Station Downtown, Montreal, Quebec H3C 3J7, Canada
| |
Collapse
|
33
|
Moha V, Cozzula D, Hölscher M, Leitner W, Müller TE. A DFT Study on the Co-polymerization of CO2 and Ethylene: Feasibility Analysis for the Direct Synthesis of Polyethylene Esters. CHEMSUSCHEM 2016; 9:1614-1622. [PMID: 27322770 DOI: 10.1002/cssc.201501615] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Revised: 05/11/2016] [Indexed: 06/06/2023]
Abstract
The co-polymerization of CO2 with the non-polar monomer ethylene, though highly desirable, still presents a challenge whereas the palladium-catalyzed CO/C2 H4 co-polymerization is well understood. Building on this analogy, the goal of this study was to elucidate the feasibility of developing suitable catalysts for co-polymerizing CO2 with ethylene to polyethylene esters. Computational methods based on density functional theory were hereby employed. In the search for new catalyst lead structures, a closed catalytic cycle was identified for the palladium-catalyzed CO2 /C2 H4 co-polymerization reaction. The computational study on palladium complexes with a substituted anionic 2-[bis(2,4-dimethoxyphenyl)-phosphine]-benzene-2-hydroxo ligand revealed key aspects that need to be considered when designing ligand sets for potential catalysts for the non-alternating co-polymerization of CO2 and ethylene.
Collapse
Affiliation(s)
- Verena Moha
- CAT Catalytic Center, RWTH Aachen University, Worringerweg 2, 52074, Aachen, Germany
- Lehrstuhl für Technische Chemie und Petrolchemie, Institut für Technische und Makromolekulare Chemie, RWTH Aachen University, Worringerweg 1, 52074, Aachen, Germany
| | - Daniela Cozzula
- CAT Catalytic Center, RWTH Aachen University, Worringerweg 2, 52074, Aachen, Germany
| | - Markus Hölscher
- Lehrstuhl für Technische Chemie und Petrolchemie, Institut für Technische und Makromolekulare Chemie, RWTH Aachen University, Worringerweg 1, 52074, Aachen, Germany.
| | - Walter Leitner
- Lehrstuhl für Technische Chemie und Petrolchemie, Institut für Technische und Makromolekulare Chemie, RWTH Aachen University, Worringerweg 1, 52074, Aachen, Germany
| | - Thomas E Müller
- CAT Catalytic Center, RWTH Aachen University, Worringerweg 2, 52074, Aachen, Germany.
| |
Collapse
|
34
|
Horak KT, Agapie T. Dioxygen Reduction by a Pd(0)–Hydroquinone Diphosphine Complex. J Am Chem Soc 2016; 138:3443-52. [DOI: 10.1021/jacs.5b12928] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kyle T. Horak
- Division of Chemistry and
Chemical Engineering, California Institute of Technology, 1200 East
California Boulevard MC 127-72, Pasadena, California 91125, United States
| | - Theodor Agapie
- Division of Chemistry and
Chemical Engineering, California Institute of Technology, 1200 East
California Boulevard MC 127-72, Pasadena, California 91125, United States
| |
Collapse
|
35
|
Skomski D, Tempas CD, Bukowski GS, Smith KA, Tait SL. Redox-active on-surface polymerization of single-site divalent cations from pure metals by a ketone-functionalized phenanthroline. J Chem Phys 2015; 142:101913. [PMID: 25770502 DOI: 10.1063/1.4906894] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Metallic iron, chromium, or platinum mixing with a ketone-functionalized phenanthroline ligand on a single crystal gold surface demonstrates redox activity to a well-defined oxidation state and assembly into thermally stable, one dimensional, polymeric chains. The diverging ligand geometry incorporates redox-active sub-units and bi-dentate binding sites. The gold surface provides a stable adsorption environment and directs growth of the polymeric chains, but is inert with regard to the redox chemistry. These systems are characterized by scanning tunnelling microscopy, non-contact atomic force microscopy, and X-ray photoelectron spectroscopy under ultra-high vacuum conditions. The relative propensity of the metals to interact with the ketone group is examined, and it is found that Fe and Cr more readily complex the ligand than Pt. The formation and stabilization of well-defined transition metal single-sites at surfaces may open new routes to achieve higher selectivity in heterogeneous catalysts.
Collapse
Affiliation(s)
- Daniel Skomski
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, Indiana 47405, USA
| | - Christopher D Tempas
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, Indiana 47405, USA
| | - Gregory S Bukowski
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, Indiana 47405, USA
| | - Kevin A Smith
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, Indiana 47405, USA
| | - Steven L Tait
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, Indiana 47405, USA
| |
Collapse
|
36
|
Tesmar A, Inkielewicz-Stępniak I, Sikorski A, Wyrzykowski D, Jacewicz D, Zięba P, Pranczk J, Ossowski T, Chmurzyński L. Structure, physicochemical and biological properties of new complex salt of aqua-(nitrilotriacetato-N,O,O',O")-oxidovanadium(IV) anion with 1,10-phenanthrolinium cation. J Inorg Biochem 2015; 152:53-61. [PMID: 26349013 DOI: 10.1016/j.jinorgbio.2015.08.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Revised: 07/23/2015] [Accepted: 08/04/2015] [Indexed: 02/02/2023]
Abstract
The crystal structure of new 1,10-phenathrolin-1-ium aqua-(nitrilotriacetato-N,O,O',O")-oxidovanadium(IV) semihydrate of molecular formula (phenH)[VO(NTA)(H2O)]∙1/2H2O was determined. This is the first example of structurally characterized compound that comprises a distinctly separated, monomeric [VO(NTA)(H2O)](-) coordination entity. The crystallographic measurements have subsequently been complemented by the IR spectroscopic characterization and thermal analysis. Furthermore, the electrochemical (cyclic voltammetry) as well as spectrophotometric (UV-vis) studies revealed that the compound is capable of scavenging the superoxide free radicals (O2(-)) as well as stable organic radicals i.e. 2,2'-azinobis(3-ethylbenzothiazoline-6 sulfonic acid) cation radical (ABTS(+)) and 2,2-diphenyl-1-picrylhydrazyl radical (DPPH), but its reactivity towards radicals is lower than that of VOSO4. Finally, biological properties of the complex in the range of 1-100 μM were investigated in relation to its cytoprotective activity against the oxidative damage generated exogenously by using hydrogen peroxide in the hippocampal neuronal HT22 cell line (the MTT and LDH tests). It has been established that in contrast to VOSO4 the title compound protects the HT22 from the oxidative damage. The paper presents a new perspective for oxidovanadium(IV) complexes as candidates for novel, low-molecular mass cytoprotective agents.
Collapse
Affiliation(s)
- A Tesmar
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - I Inkielewicz-Stępniak
- Department of Medical Chemistry, Medical University of Gdańsk, Dębinki 1, 80-211 Gdańsk, Poland
| | - A Sikorski
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - D Wyrzykowski
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland.
| | - D Jacewicz
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - P Zięba
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - J Pranczk
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - T Ossowski
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - L Chmurzyński
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
| |
Collapse
|
37
|
Canil G, Rosar V, Dalla Marta S, Bronco S, Fini F, Carfagna C, Durand J, Milani B. Unprecedented Comonomer Dependence of the Stereochemistry Control in Pd-Catalyzed CO/Vinyl Arene Polyketone Synthesis. ChemCatChem 2015. [DOI: 10.1002/cctc.201500498] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
38
|
Ferretti F, Gallo E, Ragaini F. Mineral Oil/Methanol: A Cheap Biphasic Reaction Medium with Thermomorphic Properties and Its Application to the Palladium-Catalyzed Carbonylation of Nitrobenzene to Methyl Phenylcarbamate. ChemCatChem 2015. [DOI: 10.1002/cctc.201500452] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
39
|
Tognon A, Rosar V, Demitri N, Montini T, Felluga F, Milani B. Coordination chemistry to palladium(II) of pyridylbenzamidine ligands and the related reactivity with ethylene. Inorganica Chim Acta 2015. [DOI: 10.1016/j.ica.2015.01.049] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
40
|
Sustac Roman D, Poiret V, Pelletier G, Charette AB. Direct Arylation of Imidazo[1,5-a]azines Through Ruthenium and Palladium Catalysis. European J Org Chem 2014. [DOI: 10.1002/ejoc.201403268] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
41
|
Liu TP, Huo LH, Deng ZP, Zhao H, Gao S. Supramolecular architectures and luminescent properties of the salts containing flexible bis(pyridyl) cations with aliphatic diamine spacer: effects of inorganic anions, alkalinity and conformation of the bis(pyridyl) cations. RSC Adv 2014. [DOI: 10.1039/c4ra05029k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
|
42
|
Rosar V, Meduri A, Montini T, Fini F, Carfagna C, Fornasiero P, Balducci G, Zangrando E, Milani B. Analogies and Differences in Palladium-Catalyzed CO/Styrene and Ethylene/Methyl Acrylate Copolymerization Reactions. ChemCatChem 2014. [DOI: 10.1002/cctc.201402192] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
43
|
Cherkashina NV, Nefedov SE, Uvarova MA, Klyagina AP, Markov AA, Vargaftik MN, Moiseev II. Unusual sandwich platinum(II) complex: [Pt(phen)2]2+ cation between two Pt(phen)(OOCMe)2 molecules. RUSS J INORG CHEM+ 2014. [DOI: 10.1134/s0036023614050076] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
44
|
Huang X, Zhang X, Zhang D, Yang S, Feng X, Li J, Lin Z, Cao J, Pan R, Chi Y, Wang B, Hu C. Binary Pd-polyoxometalates and isolation of a ternary Pd-V-polyoxomolybdate active species for selective aerobic oxidation of alcohols. Chemistry 2014; 20:2557-64. [PMID: 24459100 DOI: 10.1002/chem.201303714] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2013] [Revised: 11/16/2013] [Indexed: 11/08/2022]
Abstract
Binary Pd-polyoxometalates [Pd(dpa)2]3 [PW12 O40]2 ⋅12 DMSO (2), [Pd(dpa)2]3 [PMo12 O40]2 ⋅12 DMSO⋅2 H2 O (3), and [Pd(dpa)(DMSO)2]2 [HPMo10 V2 O40 ]⋅4 DMSO (4) were synthesized by reaction of [Pd(dpa)(OAc)2]⋅2 H2 O (1; dpa=2,2'-dipyridylamine) with three Keggin-type polyoxometalates and fully characterized by single-crystal and powder XRD analyses, IR spectroscopy, and elemental analyses. The synthesis is facile and straightforward, and the complicated ligand-modification procedure often used in the traditional charge-transfer method can be omitted. In 2-4, Pd complexes and polyoxometalate anions are coupled through electrostatic interaction. Compound 4 is more active than the other three compounds in the selective aerobic oxidation of alcohols at ambient pressure. Interestingly, during catalytic recycling of compound 4, unprecedented ternary Pd-V-polyoxometalate [Pd(dpa)2 {VO(DMSO)5}2][PMo12 O40]2 ⋅4 DMSO (5), which was captured and characterized by single-crystal XRD, proved to be the true active species and showed high catalytic activity for the selective aerobic oxidation of aromatic alcohols (98.1-99.8 % conversion, 91.5-99.1 % selectivity). Moreover, on the basis of control experiments and EPR and UV/Vis spectra, a plausible reaction mechanism for the oxidation of alcohols catalyzed by 5 was proposed.
Collapse
Affiliation(s)
- Xianqiang Huang
- Key Laboratory of Cluster Science, Ministry of Education, School of Chemistry, Beijing Institute of Technology, Beijing 100081 (P. R. China), Fax: (+86) 10-68912631; Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, 252059 (P. R. China)
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
45
|
Zhang ZY, Deng ZP, Huo LH, Zhang SE, Zhao H, Gao S. Role of Anion–π Interactions in the Supramolecular Assembly of Salts Containing Asymmetrical Bis(pyridyl) Cations. Aust J Chem 2014. [DOI: 10.1071/ch13673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Self-assembly of three flexible bis(pyridyl) molecules with different inorganic acids (HPF6, HClO4, and HNO3) leads to the formation of eight salts, which exhibit diverse architectures involving hydrogen bonding and anion–π interactions. The three types of inorganic anions in these salts formed anion–π interactions with HM+ and H2M2+ except for 2, in which the six F atoms were involved in hydrogen bonds. Anion–π interactions produced diverse motifs of one (anion)-to-one (cation) in 1, 3, 4, and 6, two (anion)-to-one (cation) in 5 and 7, and (4,4) layer in 8. Hydrogen bonds resulted in interesting supramolecular architectures, such as right- and left-handed helical chains in 3, 2-fold interpenetrating networks in 5, and 3-fold interpenetrating networks in 8. Structural analyses indicated that the conformations of the three flexible asymmetrical bis(pyridyl) molecules and the non-covalent bonding interactions, such as hydrogen bonds and anion···π interactions, play crucial roles in the final architectures of these salts. Thermogravimetric analyses indicated that the thermal stability of the eight salts decreased in the order of perchlorates, hexafluorophosphates, and nitrates. The emission intensity of the perchlorates is much stronger than that of the hexafluorophosphates, nitrates, and their corresponding organic molecules in the solid state at room temperature.
Collapse
|
46
|
Campos-Carrasco A, Bruce M, Reguero M, Masdeu-Bultó AM. Pd(II) complexes with 3,3′-substituted bipyridine ligands: Synthesis, crystal structure, DFT calculations and catalytic studies in compressed carbon dioxide. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2013.09.053] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
47
|
Carfagna C, Gatti G, Paoli P, Binotti B, Fini F, Passeri A, Rossi P, Gabriele B. New Aryl α-Diimine Palladium(II) Catalysts in Stereocontrolled CO/Vinyl Arene Copolymerization. Organometallics 2013. [DOI: 10.1021/om400887x] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Carla Carfagna
- Dipartimento di Scienze Biomolecolari, Università di Urbino “Carlo Bo”, Piazza Rinascimento 6, 61029 Urbino, Italy
| | - Giuseppe Gatti
- Dipartimento di Scienze Biomolecolari, Università di Urbino “Carlo Bo”, Piazza Rinascimento 6, 61029 Urbino, Italy
| | - Paola Paoli
- Dipartimento di Ingegneria Industriale, Università di Firenze, Via S. Marta 3, 50139 Firenze, Italy
| | - Barbara Binotti
- Dipartimento di Scienze Biomolecolari, Università di Urbino “Carlo Bo”, Piazza Rinascimento 6, 61029 Urbino, Italy
| | - Francesco Fini
- Dipartimento di Scienze Biomolecolari, Università di Urbino “Carlo Bo”, Piazza Rinascimento 6, 61029 Urbino, Italy
| | - Alessandra Passeri
- Dipartimento di Scienze Biomolecolari, Università di Urbino “Carlo Bo”, Piazza Rinascimento 6, 61029 Urbino, Italy
| | - Patrizia Rossi
- Dipartimento di Ingegneria Industriale, Università di Firenze, Via S. Marta 3, 50139 Firenze, Italy
| | - Bartolo Gabriele
- Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, Via P. Bucci, 12/C, 87036 Arcavacata di Rende (CS), Italy
| |
Collapse
|
48
|
Rivera VM, Ruelas-Leyva JP, Fuentes GA. Pd and Ru complexes bearing axially chiral ligands for the asymmetric hydrogenation of CC and CO double bonds. Catal Today 2013. [DOI: 10.1016/j.cattod.2013.03.043] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
49
|
Shibahara F, Murai T. Direct CH Arylation of Heteroarenes Catalyzed by Palladium/ Nitrogen-Based Ligand Complexes. ASIAN J ORG CHEM 2013. [DOI: 10.1002/ajoc.201300018] [Citation(s) in RCA: 82] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
50
|
Balboa S, Carballo R, Castiñeiras A, González-Pérez JM, Niclós-Gutiérrez J. Structural features of palladium(II) complexes with α-hydroxycarboxylate and aromatic α,α′-diimine ligands. Polyhedron 2013. [DOI: 10.1016/j.poly.2012.11.048] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|