1
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Watson LJ, Hill AF. C-H activation in bimetallic rhodium complexes to afford N-heterocyclic carbene pincer complexes. Dalton Trans 2023; 52:2164-2174. [PMID: 36723105 DOI: 10.1039/d2dt03984b] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The pro-ligands 1,8-bis(di-R-phosphinomethyl)-2,3-dihydroperimidine (RH2Pm, R = phenyl, cyclohexyl) react with [RhCl(CE)(PPh3)2] (E = O, S) to afford the bimetallic complexes [RhCl(CE)(μ-RH2Pm)]2 (E = O, S). Upon heating, these species undergo double C-H activation to afford the N-heterocyclic carbene (NHC) pincer complexes [RhCl(RPm)]. Reduction of [RhCl(CO)(μ-PhH2Pm)]2 with KC8 results in the bimetallic rhodium(0) complex, [Rh(μ-CO)(PhH2Pm)]2, with a formal Rh-Rh bond and a hydrogen-bonding interaction between rhodium and the central methylene group (C-H⋯Rh = 2.802 Å). Upon treatment with tritylium, ferrocenium or triphenylcyclopropenium tetrafluoroborates this species undergoes double C-H activation to afford a mononuclear NHC pincer complex salt, [Rh(CO)(PhPm)]BF4. Treatment of [RhCl(CO)(PhH2Pm)]2 with lithium (trimethylsilyl)acetylide provides another bimetallic species, [Rh(CCSiMe3)(CO)(PhH2Pm)]2, however heating this species does not proceed cleanly to the monomeric NHC complex, [Rh(CCSiMe3)(CO)(PhPm)] which may however be obtained from [RhCl(RPm)] and LiCCSiMe3.
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Affiliation(s)
- Lachlan J Watson
- Research School of Chemistry, The Australian National University, Canberra, ACT 0200, Australia.
| | - Anthony F Hill
- Research School of Chemistry, The Australian National University, Canberra, ACT 0200, Australia.
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2
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Dinuclear Reactivity of One Metal Exalted by the Second One. TOP ORGANOMETAL CHEM 2023. [DOI: 10.1007/3418_2022_80] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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3
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Rahmatpour A, Sajjadinezhad SM, Mirkani A, Notash B. Regioselective synthesis of di-aromatic ring-fused 2,8-dioxa/dithia bicyclo[3,3,1]nonane derivatives via recyclable polymeric Brønsted acid-catalyzed one-pot tandem formation of multiple chemical C–C/C–O and C–C/C–S bonds. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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4
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Zhang ZJ, Zhou X, Li D, Chen Y, Xiao WW, Li RT, Shao LD. Aerobic Copper-Catalyzed Intramolecular Cascade Oxidative Isomerization/[4+4] Cyclization of 2,2'-Disubstituted Stilbenes. J Org Chem 2021; 86:7609-7624. [PMID: 33904741 DOI: 10.1021/acs.joc.1c00656] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An aerobic copper-catalyzed cascade oxidative isomerization/[4+4] cyclization of 2,2'-disubstituted stilbenes is described. Under the mild CuCl/DBED/air catalytic system, various 5,10-heteroatom-containing tetrahydroindeno[2,1-a]indenes were efficiently prepared through the difunctionalizations of alkenes in a highly atom economic manner. Mechanistic investigations suggested the bicyclic product was likely formed through a sequence of rapid single-electron oxidation/[4+4] cyclization from 2,2'-disubstituted stilbene. The antarafacial manner of the thermally allowed [4+4] cyclization was further proven by series of control experiments and density functional theory calculations. Our findings provide an important addition to the aerobic copper-catalyzed oxidative cyclization.
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Affiliation(s)
- Zhi-Jun Zhang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China
| | - Xu Zhou
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China
| | - Dashan Li
- Yunnan Key Laboratory of Southern Medicinal Utilization, School of Chinese Materia Medica, Yunnan University of Chinese Medicine, Kunming 650500, China
| | - Yang Chen
- Yunnan Key Laboratory of Southern Medicinal Utilization, School of Chinese Materia Medica, Yunnan University of Chinese Medicine, Kunming 650500, China
| | - Wen-Wen Xiao
- Yunnan Key Laboratory of Southern Medicinal Utilization, School of Chinese Materia Medica, Yunnan University of Chinese Medicine, Kunming 650500, China
| | - Rong-Tao Li
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China
| | - Li-Dong Shao
- Yunnan Key Laboratory of Southern Medicinal Utilization, School of Chinese Materia Medica, Yunnan University of Chinese Medicine, Kunming 650500, China
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5
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Singh G, Pandey R, Kurup AS, Anand RV. A Base-Mediated Approach Towards Dihydrofuro[2,3-b]Benzofurans from 2-Nitrobenzofurans and 1,3-Dicarbonyls. Chem Asian J 2021; 16:1271-1279. [PMID: 33788982 DOI: 10.1002/asia.202100184] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 03/26/2021] [Indexed: 11/08/2022]
Abstract
A straight-forward approach for the synthesis of a dihydrofuro[2,3-b]benzofuran derivatives has been achieved through a base-mediated Michael addition of 1,3-dicarbonyls to 2-nitrobenzofurans followed by intramolecular cyclization. A variety of 1,3-dicarbonyls, including cyclic as well as trifluoromethylated ones, have been subjected to react with 2-nitrobenzofurans under optimal conditions, and the respective dihydrofuro[2,3-b]benzofurans could be accessed in moderate to excellent yields.
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Affiliation(s)
- Gurdeep Singh
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, S. A. S. Nagar, Manauli (PO), Punjab, 140306, India
| | - Rajat Pandey
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, S. A. S. Nagar, Manauli (PO), Punjab, 140306, India
| | - Adarsh S Kurup
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, S. A. S. Nagar, Manauli (PO), Punjab, 140306, India
| | - Ramasamy Vijaya Anand
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, S. A. S. Nagar, Manauli (PO), Punjab, 140306, India
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6
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Cherepakhin V, Hellman A, Lan Z, Mallikarjun Sharada S, Williams TJ. Heterobimetallic complexes of IrM (M = Fe II, Co II, and Ni II) core and bridging 2-(diphenylphosphino)pyridine: electronic structure and electrochemical behavior. Dalton Trans 2020; 49:10509-10515. [PMID: 32748911 DOI: 10.1039/d0dt01801e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Three complexes based on an Ir-M (M = FeII, CoII, and NiII) heterobimetallic core and 2-(diphenylphosphino)pyridine (Ph2PPy) ligand were synthesized via the reaction of trans-[IrCl(CO)(Ph2PPy)2] and the corresponding metal chloride. Their structures were established by single-crystal X-ray diffraction as [Ir(CO)(μ-Cl)(μ-Ph2PPy)2FeCl2]·2CH2Cl2 (2), [IrCl(CO)(μ-Ph2PPy)2CoCl2]·2CH2Cl2 (3), and [Ir(CO)(μ-Cl)(μ-Ph2PPy)2NiCl2]·2CH2Cl2 (4). Time-dependent DFT computations suggest a donor-acceptor interaction between a filled 5dz2 orbital on iridium and an empty orbital on the first-row metal atom, which is supported by UV-vis studies. Magnetic moment measurements show that the first-row metals are in their high-spin electronic configurations. Cyclic voltammetry data show that all the complexes undergo irreversible decomposition upon either reduction or oxidation. Reduction of 4 proceeds through an ECE mechanism. While these complexes are not stable to electrocatalysis conditions, the data presented here refine our understanding of the bonding synergies of the first-row and third-row metals.
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Affiliation(s)
- Valeriy Cherepakhin
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA.
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7
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Alejo-Armijo A, Salido S, Altarejos JN. Synthesis of A-Type Proanthocyanidins and Their Analogues: A Comprehensive Review. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:8104-8118. [PMID: 32633514 DOI: 10.1021/acs.jafc.0c03380] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Proanthocyanidins (PACs) are oligomers or polymers composed of units of flavanols. A-type PACs are a subclass of PACs characterized by the presence of at least a double linkage between two consecutive monomers of flavanol. These A-type PACs are found in some fruits and spices and possess potential health benefits as a result of their interesting biological activities, and consequently, their isolation and synthesis have given rise to great interest in the past. This review summarizes the synthetic efforts made to obtain both naturally occurring A-type PACs and their structurally simplified analogues. Most of the synthetic protocols reported involve the addition of a π-nucleophilic molecule over a molecule with two electrophilic carbons, such as a chalcone, a flavylium salt, or a flavanol derivative, among others. Synthesis of A-type PACs remains an issue at a very early stage of development compared to that of PACs with single linkages between monomers (B-type PACs), but the advances that are taking place in the last few years point to a significant development of the subject in the near future.
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Affiliation(s)
- Alfonso Alejo-Armijo
- Departamento de Quı́mica Inorgánica y Orgánica, Facultad de Ciencias Experimentales, Universidad de Jaén, Campus de Excelencia Internacional Agroalimentario, ceiA3, 23071 Jaén, Spain
| | - Sofía Salido
- Departamento de Quı́mica Inorgánica y Orgánica, Facultad de Ciencias Experimentales, Universidad de Jaén, Campus de Excelencia Internacional Agroalimentario, ceiA3, 23071 Jaén, Spain
| | - Joaquı N Altarejos
- Departamento de Quı́mica Inorgánica y Orgánica, Facultad de Ciencias Experimentales, Universidad de Jaén, Campus de Excelencia Internacional Agroalimentario, ceiA3, 23071 Jaén, Spain
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8
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Tavallaei H, Jafarpour M, Feizpour F, Rezaeifard A, Farrokhi A. A Cooperative Effect in a Novel Bimetallic Mo-V Nanocomplex Catalyzed Selective Aerobic C-H Oxidation. ACS OMEGA 2019; 4:3601-3610. [PMID: 31459574 PMCID: PMC6648445 DOI: 10.1021/acsomega.8b02832] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Accepted: 01/15/2019] [Indexed: 05/03/2023]
Abstract
In this study, a new heterobimetallic Mo(VI)-V(V) organosilicon Schiff base complex has been prepared and characterized by different techniques, such as FTIR, Raman, MS, ICP-AES, TGA, and XPS. The bimetallic nanocomplex, revealed by TEM images, showed high oxidation stability and desired activity in the aerobic oxidation of a structurally diverse set of benzylic alcohols in ethanol as a safe solvent. Further, oxidation of benzylic hydrocarbons successfully occurred, producing the target compounds in high yields and excellent selectivities. Our results demonstrated a cooperative effect between Mo(VI) and V(V) as redox active sites in an organosilicon Schiff base framework. A facile and practical reusability of the solid catalyst at the end of the reaction was observed.
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Affiliation(s)
- Hasan Tavallaei
- Catalysis Research Laboratory, Department
of Chemistry, Faculty of Science, University
of Birjand, Birjand 97179-414, Iran
| | - Maasoumeh Jafarpour
- Catalysis Research Laboratory, Department
of Chemistry, Faculty of Science, University
of Birjand, Birjand 97179-414, Iran
| | - Fahimeh Feizpour
- Catalysis Research Laboratory, Department
of Chemistry, Faculty of Science, University
of Birjand, Birjand 97179-414, Iran
| | - Abdolreza Rezaeifard
- Catalysis Research Laboratory, Department
of Chemistry, Faculty of Science, University
of Birjand, Birjand 97179-414, Iran
| | - Alireza Farrokhi
- Catalysis Research Laboratory, Department
of Chemistry, Faculty of Science, University
of Birjand, Birjand 97179-414, Iran
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9
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Rahmatpour A, Goodarzi N. New thermally stable condensation polymers containing central ketal moieties derived from malonaldehydetetramethyl acetal and dihydroxyaromatic compounds. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2018. [DOI: 10.1080/10601325.2018.1499418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Ali Rahmatpour
- Department of Polymer Chemistry, Faculty of Chemistry, Shahid Beheshti University, Tehran, Iran
| | - Niloofar Goodarzi
- Department of Polymer Chemistry, Faculty of Chemistry, Shahid Beheshti University, Tehran, Iran
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10
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Zhu Y, Yao Z, Xu F. Cationic-lanthanide-complex-catalyzed reaction of 2-hydroxychalcones with naphthols: Facile synthesis of 2,8-dioxabicyclo[3.3.1]nonanes. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.06.038] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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11
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Ganji P, van Leeuwen PWNM. Phosphine Supported Ruthenium Nanoparticle Catalyzed Synthesis of Substituted Pyrazines and Imidazoles from α-Diketones. J Org Chem 2017; 82:1768-1774. [DOI: 10.1021/acs.joc.6b03032] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Prasad Ganji
- Institute
of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Piet W. N. M. van Leeuwen
- Institute
of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
- Laboratoire
de Physique et Chimie des Nano Objets, LPCNO, UMR5215 INSA-UPSCNRS, Université de Toulouse, Institut National des Sciences Appliquées, 135 Avenue de Rangueil, 31077 Toulouse, France
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12
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Arcau J, Ferrer M, Aguiló E, Rodríguez L. Rhodium(I) macrocyclic and cage-like structures containing diphosphine bridging ligands. TRANSIT METAL CHEM 2016. [DOI: 10.1007/s11243-016-0107-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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13
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Martínez-Ferraté O, López-Valbuena JM, Belmonte MM, White AJP, Benet-Buchholz J, Britovsek GJP, Claver C, van Leeuwen PWNM. Novel iminopyridine derivatives: ligands for preparation of Fe(ii) and Cu(ii) dinuclear complexes. Dalton Trans 2016; 45:3564-76. [PMID: 26804332 DOI: 10.1039/c5dt04358a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of imino- and amino-pyridine ligands based on dihydrobenzofurobenzofuran (BFBF) and methanodibenzodioxocine (DBDOC) backbones have been synthesized. These ligands form exclusively dinuclear complexes with metals such as iron(II) and copper(II). The structures for complexes 15, 16, 18, 19, 20, 21, 23, and 24 were determined by X-ray crystallography. The complexes show large distances for the metal nuclei and different geometries depending on the nature of the metal. An octahedral geometry was observed for the iron(II) complexes, while copper(II) complex 24 showed a distorted trigonal bipyramidal geometry. The iron(II) complexes showed activity as catalysts in the cycloaddition of CO2 to epoxides, obtaining moderate yields of cyclic carbonates.
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Affiliation(s)
- Oriol Martínez-Ferraté
- Institute of Chemical Research of Catalonia (ICIQ), Avgda. Països Catalans 16, Tarragona, Spain. and Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, C/Marcel·li Domingo s/n, 43007 Tarragona, Spain.
| | - Josep M López-Valbuena
- Institute of Chemical Research of Catalonia (ICIQ), Avgda. Països Catalans 16, Tarragona, Spain.
| | - Marta Martínez Belmonte
- Institute of Chemical Research of Catalonia (ICIQ), Avgda. Països Catalans 16, Tarragona, Spain.
| | - Andrew J P White
- Department of Chemistry, Imperial College London, Exhibition Road, South Kensington, London, UK.
| | - Jordi Benet-Buchholz
- Institute of Chemical Research of Catalonia (ICIQ), Avgda. Països Catalans 16, Tarragona, Spain.
| | - George J P Britovsek
- Department of Chemistry, Imperial College London, Exhibition Road, South Kensington, London, UK.
| | - Carmen Claver
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, C/Marcel·li Domingo s/n, 43007 Tarragona, Spain. and Centre Tecnòlogic de la Química, C/Marcel·li Domingo s/n, 43007 Tarragona, Spain.
| | - Piet W N M van Leeuwen
- Institute of Chemical Research of Catalonia (ICIQ), Avgda. Països Catalans 16, Tarragona, Spain.
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14
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Pascui AE, van Rees K, Zant DW, Broere DLJ, Siegler MA, van der Vlugt JI. Macrocyclic Platinum(II) Complexes with a Bifunctional Diphosphine Ligand. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201501055] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Andrea E. Pascui
- Homogeneous, Bio‐inspired and Supramolecular Catalysis, van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands, http://www.homkat.nl
| | - Karlotta van Rees
- Homogeneous, Bio‐inspired and Supramolecular Catalysis, van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands, http://www.homkat.nl
| | - Dirk W. Zant
- Homogeneous, Bio‐inspired and Supramolecular Catalysis, van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands, http://www.homkat.nl
| | - Daniël L. J. Broere
- Homogeneous, Bio‐inspired and Supramolecular Catalysis, van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands, http://www.homkat.nl
| | - Maxime A. Siegler
- Department of Chemistry, John Hopkins University, 3400 N Charles Street, Baltimore, Maryland 21218, USA
| | - Jarl Ivar van der Vlugt
- Homogeneous, Bio‐inspired and Supramolecular Catalysis, van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands, http://www.homkat.nl
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15
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Imrich HG, Conrad J, Beifuss U. Copper-Catalyzed Double Intramolecular Ullmann Coupling for the Synthesis of Diastereomerically and Enantiomerically Pure 4b,9b-Dihydrobenzofuro[3,2-b]benzofurans. European J Org Chem 2015. [DOI: 10.1002/ejoc.201501132] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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16
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Jouffroy M, Armspach D, Matt D. Cyclodextrin and phosphorus(iii): a versatile combination for coordination chemistry and catalysis. Dalton Trans 2015; 44:12942-69. [DOI: 10.1039/c5dt00667h] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The relevance of cyclodextrins equipped with P(iii) atoms in coordination chemistry and homogeneous catalysis is discussed.
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Affiliation(s)
- Matthieu Jouffroy
- Laboratoire de Chimie Inorganique Moléculaire et Catalyse
- Institut de Chimie UMR 7177 CNRS
- Université de Strasbourg
- 67070 Strasbourg cedex
- France
| | - Dominique Armspach
- Laboratoire de Chimie Inorganique Moléculaire et Catalyse
- Institut de Chimie UMR 7177 CNRS
- Université de Strasbourg
- 67070 Strasbourg cedex
- France
| | - Dominique Matt
- Laboratoire de Chimie Inorganique Moléculaire et Catalyse
- Institut de Chimie UMR 7177 CNRS
- Université de Strasbourg
- 67070 Strasbourg cedex
- France
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17
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Vuong KQ, Wong CM, Bhadbhade M, Messerle BA. Bi- and tri-metallic Rh and Ir complexes containing click derived bis- and tris-(pyrazolyl-1,2,3-triazolyl) N-N' donor ligands and their application as catalysts for the dihydroalkoxylation of alkynes. Dalton Trans 2014; 43:7540-53. [PMID: 24699761 DOI: 10.1039/c3dt53295j] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of bi-topic and tri-topic pyrazolyl-1,2,3-triazolyl donor ligands (; = 1,X-bis((4-((1H-pyrazol-1-yl)methyl)-1H-1,2,3-triazol-1-yl)methyl)benzene (X = 2, 3 and 4; o-C6H4(PyT)2, m-C6H4(PyT)2 and p-C6H4(PyT)2) and = 1,3,5-tris((4-((1H-pyrazol-1-yl)methyl)-1H-1,2,3-triazol-1-yl)methyl)benzene, 1,3,5-C6H3(PyT)3) were conveniently synthesised in 'one pot' reactions using the Cu(i) catalysed 'click' reaction. Rh(i), Ir(i), Rh(iii) and Ir(iii) complexes with ligands of the general formulae C6H6-n[(PyT)M(CO)2]n[BAr]n (M = Rh, Ir; n = 2, 3; ; ) and C6H6-n[(PyT)MCp*Cl]n[BAr]n (M = Rh, Ir; n = 2, 3; ; ) were synthesised and fully characterised. In solution each of the bi- or tri-metallic complexes and exists as a mixture of two (, ) or three ( and ) diastereomers due to the presence of a chiral centre at each metal centre in these complexes. The solid state structures of complexes and were determined by single crystal X-ray crystallography and showed that each bidentate arm of these multitopic ligands coordinates to the Rh or Ir centre in a bidentate fashion via the pyrazolyl-N2 and 1,2,3-triazolyl N3' donors. The intermetallic distances in these solid state structures vary from 8.66 Å to 15.17 Å. These complexes were assessed as catalysts for the dihydroalkoxylation of alkynes using the cyclisation of 2-(5-hydroxypent-1-ynyl)benzyl alcohol, , to a mixture of two spiroketals, 2,3,4,5-tetrahydro-spirol[furan-2,3'-isochroman], , and 3',4',5',6'-tetrahydro-spiro[isobenzofuran-1(3H),2'(2H)pyran], , as the model reaction. The Rh(i) complexes (), with the highest TOF of 2052 h(-1) for complex , were the most active catalysts when compared with the other complexes under investigation here. The Ir(i) complexes () were moderately active as catalysts for the same transformation. No significant enhancement in catalytic reactivity was observed with the Rh(i) series bi- and trimetallic complexes () when compared with their monometallic analogues. The bi- and trimetallic Ir(i) complexes () were much more efficient as catalysts for this transformation than their monometallic analogues, suggesting some intermetallic cooperativity. Rh(iii), , and Ir(iii), , complexes were not active as catalysts for this transformation.
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Affiliation(s)
- Khuong Q Vuong
- School of Chemistry, The University of New South Wales, Kensington, NSW 2052, Australia
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18
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Xia L, Cai H, Lee YR. Catalyst-controlled regio- and stereoselective synthesis of diverse 12H-6,12-methanodibenzo[d,g][1,3]dioxocines. Org Biomol Chem 2014; 12:4386-96. [DOI: 10.1039/c4ob00691g] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Regio- and stereoselective synthesis of 12H-6,12-methanodibenzo[d,g][1,3]dioxocines has been accomplished by the EDDA and PTSA-catalyzed cascade reactions of resorcinols and 2-hydroxychalcones.
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Affiliation(s)
- Likai Xia
- School of Chemical Engineering
- Yeungnam University
- Gyeongsan 712-749, Republic of Korea
| | - Hongyun Cai
- School of Chemical Engineering
- Yeungnam University
- Gyeongsan 712-749, Republic of Korea
| | - Yong Rok Lee
- School of Chemical Engineering
- Yeungnam University
- Gyeongsan 712-749, Republic of Korea
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19
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Bingi C, Emmadi NR, Chennapuram M, Nanubolu JB, Atmakur K. A simple and catalyst free one pot access to the pyrazolone fused 2,8-dioxabicyclo[3.3.1]nonanes. RSC Adv 2014. [DOI: 10.1039/c4ra07278b] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Synthesis of a series of novel aryl and heteroaryl fused 2,8-dioxabicyclo[3.3.1]nonanes (3) was accomplished by one pot, catalyst free reaction of 2-hydroxy chalcones (1) with 3-trifluoromethyl substituted pyrazolones (2) in xylene at reflux temperature. The role of –CF3 in formation of 3 was confirmed by comparing with 3-methyl pyrazolones.
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Affiliation(s)
- Chiranjeevi Bingi
- Division of Crop Protection Chemicals
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500 007, India
| | - Narender Reddy Emmadi
- Division of Crop Protection Chemicals
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500 007, India
| | - Madhu Chennapuram
- Division of Crop Protection Chemicals
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500 007, India
| | - Jagadeesh Babu Nanubolu
- Laboratory of X-ray Crystallography
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500 007, India
| | - Krishnaiah Atmakur
- Division of Crop Protection Chemicals
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500 007, India
- AcSIR-Indian Institute of Chemical Technology
- Hyderabad 500 007, India
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20
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(D,L)-10-Camphorsulfonic-Acid-Catalysed Synthesis of Diaryl-Fused 2,8-Dioxabicyclo[3.3.1]nonanes from 2-Hydroxychalcones and Naphthol Derivatives. European J Org Chem 2013. [DOI: 10.1002/ejoc.201301295] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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21
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Doddi A, Prabusankar G, Gemel C, Winter M, Fischer RA. N‐Heterocyclic Gallylene Supported Organoruthenium Derivatives – Synthesis, Structure, and C–H Bond Cleavage. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300257] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Adinarayana Doddi
- Inorganic Chemistry II ‐ Organometallics & Materials, Faculty of Chemistry and Biochemistry, Ruhr University Bochum, 44870 Bochum, Germany, Fax: +49‐234‐321‐4174, http://www.ruhr‐uni‐bochum.de/aci2/index.html.en
| | - Ganesan Prabusankar
- Inorganic Chemistry II ‐ Organometallics & Materials, Faculty of Chemistry and Biochemistry, Ruhr University Bochum, 44870 Bochum, Germany, Fax: +49‐234‐321‐4174, http://www.ruhr‐uni‐bochum.de/aci2/index.html.en
| | - Christian Gemel
- Inorganic Chemistry II ‐ Organometallics & Materials, Faculty of Chemistry and Biochemistry, Ruhr University Bochum, 44870 Bochum, Germany, Fax: +49‐234‐321‐4174, http://www.ruhr‐uni‐bochum.de/aci2/index.html.en
| | - Manuela Winter
- Inorganic Chemistry II ‐ Organometallics & Materials, Faculty of Chemistry and Biochemistry, Ruhr University Bochum, 44870 Bochum, Germany, Fax: +49‐234‐321‐4174, http://www.ruhr‐uni‐bochum.de/aci2/index.html.en
| | - Roland A. Fischer
- Inorganic Chemistry II ‐ Organometallics & Materials, Faculty of Chemistry and Biochemistry, Ruhr University Bochum, 44870 Bochum, Germany, Fax: +49‐234‐321‐4174, http://www.ruhr‐uni‐bochum.de/aci2/index.html.en
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22
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González-Gálvez D, Nolis P, Philippot K, Chaudret B, van Leeuwen PWNM. Phosphine-Stabilized Ruthenium Nanoparticles: The Effect of the Nature of the Ligand in Catalysis. ACS Catal 2012. [DOI: 10.1021/cs200633k] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - Pau Nolis
- Servei de Ressonància
Magnètica Nuclear, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Karine Philippot
- LCC (Laboratoire de Chimie de
Coordination du CNRS), CNRS, 205 route
de Narbonne, F-31077 Toulouse, France and Université de Toulouse, UPS, INPT, LCC; F-31077 Toulouse, France
| | - Bruno Chaudret
- Laboratoire de Physique et Chimie
des Nano-Objets, Institut des Sciences Appliquées de Toulouse, 31077 Toulouse, Cédex 04, France
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23
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Gramage-Doria R, Armspach D, Matt D, Toupet L. Non-conventional coordination of cavity-confined metal centres. Dalton Trans 2012; 41:8786-96. [DOI: 10.1039/c2dt30751k] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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24
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Curley JJ, Bergman RG, Tilley TD. Preparation and physical properties of early-late heterobimetallic compounds featuring Ir-M bonds (M = Ti, Zr, Hf). Dalton Trans 2011; 41:192-200. [PMID: 22020701 DOI: 10.1039/c1dt11753j] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Treatment of Cp*Ir N(t)Bu (1) with the appropriate metallocene equivalent is an effective route for the preparation of the heterobimetallic complexes Cp*Ir(μ-N(t)Bu)MCp(2) (2-M, M = Ti, Zr, Hf). The electronic structures of the isostructural series of compounds, 2-M, are described with reference to single-crystal X-ray, Raman, UV-vis, and cyclic voltammetry data. Density functional theory (DFT) calculations were used to aid in the interpretation of this experimental work. Treatment of the zirconium or hafnium congeners with 2,6-lutidinium triflate leads to protonation of the Ir-M bond, to afford Cp*Ir(μ-N(t)Bu)(μ-H)MCp(2)OTf (3-M, M = Zr, Hf). Compound 3-Zr was characterized by single-crystal X-ray diffraction and independently prepared by the reaction of 1 and Cp(2)Zr(H)Cl in the presence of Me(3)SiOTf. In reactions analogous to those for 2-Zr, 2-Hf reacts with S(8) and aryl azides to insert an S-atom or aryl azide fragment into the metal-metal bond, yielding Cp*Ir(μ-N(t)Bu)(μ-S)HfCp(2) (6-Hf) and Cp*Ir(μ-N(t)Bu)(N(3)Ph)HfCp(2) (4-Hf), respectively. Heating 4-Hf results in N(2) extrusion to form Cp*Ir(μ-N(t)Bu)(NPh)HfCp(2) (5-Hf). The kinetics of the latter reaction were studied to obtain activation parameters and a Hammett trend; these data are compared to those for the analogous reaction involving Ir-Zr heterobimetallics.
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Affiliation(s)
- John J Curley
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
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25
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Shrestha S, Gimbert‐Suriñach C, Bhadbhade M, Colbran SB. Four Soft Donors and a Hard Centre: Rhodium Complexes of a Novel Tetrakis(NHC)‐Encapsulated Crown Ether Ligand. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201100656] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sumi Shrestha
- School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia, Fax: +61‐2‐9385 6141
| | - Carolina Gimbert‐Suriñach
- School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia, Fax: +61‐2‐9385 6141
| | - Mohan Bhadbhade
- Mark Wainwright Analytical Centre, University of New South Wales, Sydney, NSW 2052, Australia
| | - Stephen B. Colbran
- School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia, Fax: +61‐2‐9385 6141
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26
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Conifer CM, Law DJ, Sunley GJ, Haynes A, Wells JR, White AJP, Britovsek GJP. Dicarbonylrhodium(I) Complexes of Bipyridine Ligands with Proximate H-Bonding Substituents and Their Application in Methyl Acetate Carbonylation. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201100423] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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27
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Tschan MJL, López-Valbuena JM, Freixa Z, Launay H, Hagen H, Benet-Buchholz J, van Leeuwen PWNM. Large P−P Distance Diphosphines and Their Monophosphine Analogues as Ligands in the Palladium-Catalyzed Telomerization of 1,3-Butadiene and Methanol. Organometallics 2011. [DOI: 10.1021/om100980m] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mathieu J.-L. Tschan
- Institute of Chemical Research of Catalonia (ICIQ), Avinguda Països Catalans 16, 43007 Tarragona, Spain
| | | | - Zoraida Freixa
- Institute of Chemical Research of Catalonia (ICIQ), Avinguda Països Catalans 16, 43007 Tarragona, Spain
| | - Hélène Launay
- Dow Benelux BV, Herbert H. Dowweg 5, P.O. Box 48, 4530 AA Terneuzen, The Netherlands
| | - Henk Hagen
- Dow Benelux BV, Herbert H. Dowweg 5, P.O. Box 48, 4530 AA Terneuzen, The Netherlands
| | - Jordi Benet-Buchholz
- Institute of Chemical Research of Catalonia (ICIQ), Avinguda Països Catalans 16, 43007 Tarragona, Spain
| | - Piet W. N. M. van Leeuwen
- Institute of Chemical Research of Catalonia (ICIQ), Avinguda Països Catalans 16, 43007 Tarragona, Spain
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