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Singh J, Sharma S, Prakasham AP, Rajaraman G, Ghosh P. Accessing Bioactive Hydrazones by the Hydrohydrazination of Terminal Alkynes Catalyzed by Gold(I) Acyclic Aminooxy Carbene Complexes and Their Gold(I) Arylthiolato and Gold(III) Tribromo Derivatives: A Combined Experimental and Computational Study. ACS OMEGA 2023; 8:21042-21073. [PMID: 37323414 PMCID: PMC10268297 DOI: 10.1021/acsomega.3c01925] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Accepted: 05/05/2023] [Indexed: 06/17/2023]
Abstract
Hydrohydrazination of terminal alkynes with hydrazides yielding hydrazones 5-14 were successfully catalyzed by a series of gold(I) acyclic aminooxy carbene complexes of the type [{(4-R2-2,6-t-Bu2-C6H2O)(N(R1)2)}methylidene]AuCl, where R2 = H, R1 = Me (1b); R2 = H, R1 = Cy (2b); R2 = t-Bu, R1 = Me (3b); R2 = t-Bu, R1 = Cy (4b). The mass spectrometric evidence corroborated the existence of the catalytically active solvent-coordinated [(AAOC)Au(CH3CN)]SbF6 (1-4)A species and the acetylene-bound [(AAOC)Au(HC≡CPhMe)]SbF6 (3B) species of the proposed catalysis cycle. The hydrohydrazination reaction was successfully employed in synthesizing several bioactive hydrazone compounds (15-18) with anticonvulsant properties using a representative precatalyst (2b). The DFT studies favored the 4-ethynyltoluene (HC≡CPhMe) coordination pathway over the p-toluenesulfonyl hydrazide (NH2NHSO2C6H4CH3) coordination pathway, and that proceeded by a crucial intermolecular hydrazide-assisted proton transfer step. The gold(I) complexes (1-4)b were synthesized from the {[(4-R2-2,6-t-Bu2-C6H2O)(N(R1)2)]CH}+OTf- (1-4)a by treatment with (Me2S)AuCl in the presence of NaH as a base. The reactivity studies of (1-4)b yielded the gold(III) [{(4-R2-2,6-t-Bu2-C6H2O)(N(R1)2)}methylidene]AuBr3 (1-4)c complexes upon reaction with molecular bromine and the gold(I) perfluorophenylthiolato derivatives, [{(4-R2-2,6-t-Bu2-C6H2O)(N(R1)2)}methylidene]AuSC6F5 (1-4)d, upon treatment with C6F5SH.
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2
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Pandey AK, Chand S, Sharma AK, Singh KN. Copper-Catalyzed Thiolation of Hydrazones with Sodium Sulfinates: A Straightforward Synthesis of Benzylic Thioethers. J Org Chem 2023; 88:475-482. [PMID: 36520416 DOI: 10.1021/acs.joc.2c02451] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A facile and sustainable protocol for the thiolation of hydrazones with sodium sulfinates has been developed in the presence of CuBr2 and DBU in DMF to afford diverse benzylic thioethers. Control experiments reveal a radical pathway involving a thiyl radical as a key intermediate.
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Affiliation(s)
- Anand Kumar Pandey
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi-221005, India
| | - Shiv Chand
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi-221005, India
| | - Anup Kumar Sharma
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi-221005, India
| | - Krishna Nand Singh
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi-221005, India
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3
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Cyclic (alkyl)(amino)carbene (CAAC) ligands: Electronic structure and application as chemically- and redox-non-innocent ligands and chromophores. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2022. [DOI: 10.1016/bs.adomc.2022.03.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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4
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Vethacke V, Claus V, Dietl MC, Ehjeij D, Meister A, Huber JF, Paschai Darian LK, Rudolph M, Rominger F, Hashmi ASK. Access to Unsymmetrically Substituted Diaryl Gold N‐Acyclic Carbene (NAC) and N‐Heterocyclic Carbene (NHC) Complexes via the Isonitrile Route. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202101000] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Vanessa Vethacke
- Organisch-Chemisches Institut Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Vanessa Claus
- Organisch-Chemisches Institut Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Martin C. Dietl
- Organisch-Chemisches Institut Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Daniel Ehjeij
- Organisch-Chemisches Institut Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Arne Meister
- Organisch-Chemisches Institut Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Jonas F. Huber
- Organisch-Chemisches Institut Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Leon K. Paschai Darian
- Organisch-Chemisches Institut Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Matthias Rudolph
- Organisch-Chemisches Institut Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Frank Rominger
- Organisch-Chemisches Institut Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - A. Stephen K. Hashmi
- Organisch-Chemisches Institut Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
- Chemistry Department, Faculty of Science King Abdulaziz University Jeddah 21589 Saudi Arabia
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5
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Franchino A, Martí À, Nejrotti S, Echavarren AM. Silver-Free Au(I) Catalysis Enabled by Bifunctional Urea- and Squaramide-Phosphine Ligands via H-Bonding. Chemistry 2021; 27:11989-11996. [PMID: 34018646 PMCID: PMC8457243 DOI: 10.1002/chem.202101751] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Indexed: 12/14/2022]
Abstract
A library of gold(I) chloride complexes with phosphine ligands incorporating pendant (thio)urea and squaramide H-bond donors was prepared with the aim of promoting chloride abstraction from Au(I) via H-bonding. In the absence of silver additives, complexes bearing squaramides and trifluoromethylated aromatic ureas displayed good catalytic activity in the cyclization of N-propargyl benzamides, as well as in a 1,6-enyne cycloisomerization, a tandem cyclization-indole addition reaction and the hydrohydrazination of phenylacetylene. Kinetic studies and DFT calculations indicate that the energetic span of the reaction is accounted by both the chloride abstraction step, facilitated by the bidentate H-bond donor via an associative mechanism, and the subsequent cyclization step.
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Affiliation(s)
- Allegra Franchino
- Institute of Chemical Research of Catalonia (ICIQ)Barcelona Institute of Science and TechnologyAv. Països Catalans 1643007TarragonaSpain
- Departament de Química Analítica i Química OrgànicaUniversitat Rovira i VirgiliC/ Marcel⋅lí Domingo s/n43007TarragonaSpain
| | - Àlex Martí
- Institute of Chemical Research of Catalonia (ICIQ)Barcelona Institute of Science and TechnologyAv. Països Catalans 1643007TarragonaSpain
- Departament de Química Analítica i Química OrgànicaUniversitat Rovira i VirgiliC/ Marcel⋅lí Domingo s/n43007TarragonaSpain
| | - Stefano Nejrotti
- Institute of Chemical Research of Catalonia (ICIQ)Barcelona Institute of Science and TechnologyAv. Països Catalans 1643007TarragonaSpain
- Departament de Química Analítica i Química OrgànicaUniversitat Rovira i VirgiliC/ Marcel⋅lí Domingo s/n43007TarragonaSpain
| | - Antonio M. Echavarren
- Institute of Chemical Research of Catalonia (ICIQ)Barcelona Institute of Science and TechnologyAv. Països Catalans 1643007TarragonaSpain
- Departament de Química Analítica i Química OrgànicaUniversitat Rovira i VirgiliC/ Marcel⋅lí Domingo s/n43007TarragonaSpain
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6
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Collado A, Nelson DJ, Nolan SP. Optimizing Catalyst and Reaction Conditions in Gold(I) Catalysis-Ligand Development. Chem Rev 2021; 121:8559-8612. [PMID: 34259505 DOI: 10.1021/acs.chemrev.0c01320] [Citation(s) in RCA: 59] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
This review considers phosphine and N-heterocyclic carbene complexes of gold(I) that are used as (pre)catalysts for a range of reactions in organic synthesis. These are divided according to the structure of the ligand, with the narrative focusing on studies that offer a quantitative comparison between the ligands and readily available or widely used existing systems.
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Affiliation(s)
- Alba Collado
- Departamento de Química Inorgánica, Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente, 7, 28049 Madrid, Spain
| | - David J Nelson
- WestCHEM Department of Pure & Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, Scotland
| | - Steven P Nolan
- Department of Chemistry and Center for Sustainable Chemistry, Ghent University, Krijgslaan 281 - S3, 9000 Gent, Belgium
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7
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Campos‐Dominguez E, Vasquez‐Perez J, Rojas‐Lima S, Lopez‐Ruiz H, Mendoza‐Espinosa D. Gold(I) complexes bearing ring‐fused benzoxazine‐derived triazolylidenes and their use in C–N bond‐forming processes. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.6098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Emmanuel Campos‐Dominguez
- Área Académica de Química Universidad Autónoma del Estado de Hidalgo Mineral de la Reforma Hidalgo Mexico
| | - Jose Vasquez‐Perez
- Área Académica de Química Universidad Autónoma del Estado de Hidalgo Mineral de la Reforma Hidalgo Mexico
| | - Susana Rojas‐Lima
- Área Académica de Química Universidad Autónoma del Estado de Hidalgo Mineral de la Reforma Hidalgo Mexico
| | - Heraclio Lopez‐Ruiz
- Área Académica de Química Universidad Autónoma del Estado de Hidalgo Mineral de la Reforma Hidalgo Mexico
| | - Daniel Mendoza‐Espinosa
- Área Académica de Química Universidad Autónoma del Estado de Hidalgo Mineral de la Reforma Hidalgo Mexico
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8
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Yadav S, Ray S, Singh A, Mobin SM, Roy TK, Dash C. Dinuclear gold(I)‐N‐heterocyclic carbene complexes: Synthesis, characterization, and catalytic application for hydrohydrazidation of terminal alkynes. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Seema Yadav
- Department of Chemistry, School of Chemical Sciences and Pharmacy Central University of Rajasthan Bandar Sindri, Ajmer Rajasthan 305817 India
| | - Sriparna Ray
- Department of Chemistry, School of Basic Sciences Manipal University Jaipur Jaipur Rajasthan 303007 India
| | - Ajeet Singh
- Department of Chemistry Indian Institute of Technology (IIT) Indore Simrol, Khandwa Road Indore 453552 India
| | - Shaikh M. Mobin
- Department of Chemistry Indian Institute of Technology (IIT) Indore Simrol, Khandwa Road Indore 453552 India
| | - Tapta Kanchan Roy
- Department of Chemistry and Chemical Sciences Central University of Jammu Jammu 180001 India
| | - Chandrakanta Dash
- Department of Chemistry, School of Chemical Sciences and Pharmacy Central University of Rajasthan Bandar Sindri, Ajmer Rajasthan 305817 India
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9
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Beletskaya IP, Naájera C, Yus M. Catalysis and regioselectivity in hydrofunctionalization reactions of unsaturated carbon bonds. Part II. Hydroamination. RUSSIAN CHEMICAL REVIEWS 2020. [DOI: 10.1070/rcr4953] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
This review continues consideration of the regioselectivity problem in the catalyzed hydrofunctionalization of unsaturated organic compounds and addresses hydroamination of unsaturated hydrocarbons. Particular parts of the review deal with reactions of alkenes, alkynes, allenes and dienes. It is shown that the selectivity of hydroamination depends on the natures of the reactants and the catalyst. Conditions of the reactions are described; in some cases, reaction mechanisms are discussed. Reactions for which divergent regioselectivity is possible are noted.
The bibliography includes 249 references.
Dedicated to the memory of V.V.Markovnikov.
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10
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Heidrich M, Plenio H. Efficient [(NHC)Au(NTf 2)]-catalyzed hydrohydrazidation of terminal and internal alkynes. Beilstein J Org Chem 2020; 16:2080-2086. [PMID: 32952724 PMCID: PMC7476583 DOI: 10.3762/bjoc.16.175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Accepted: 08/11/2020] [Indexed: 11/23/2022] Open
Abstract
The efficient hydrohydrazidation of terminal (6a–r, 18 examples, 0.1–0.2 mol % [(NHC)Au(NTf2)], T = 60 °C) and internal alkynes (7a–j, 10 examples, 0.2–0.5 mol % [(NHC)Au(NTf2)], T = 60–80 °C) utilizing a complex with a sterically demanding bispentiptycenyl-substituted NHC ligand and the benign reaction solvent anisole, is reported.
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Affiliation(s)
- Maximillian Heidrich
- Organometallic Chemistry, Technische Universität Darmstadt, Alarich-Weiss-Str. 12, 64287 Darmstadt, Germany
| | - Herbert Plenio
- Organometallic Chemistry, Technische Universität Darmstadt, Alarich-Weiss-Str. 12, 64287 Darmstadt, Germany
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11
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Cervantes‐Reyes A, Rominger F, Hashmi ASK. Sterically Demanding Ag I and Cu I N-Heterocyclic Carbene Complexes: Synthesis, Structures, Steric Parameters, and Catalytic Activity. Chemistry 2020; 26:5530-5540. [PMID: 32104933 PMCID: PMC7216994 DOI: 10.1002/chem.202000600] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 02/27/2020] [Indexed: 12/13/2022]
Abstract
The synthesis and full characterization of new air-stable AgI and CuI complexes bearing structurally bulky expanded-ring N-heterocyclic carbene (erNHC) ligands is presented. The condensation of protonated NHC salts with Ag2 O afforded a collection of AgI complexes, and their first use as ligand transfer reagents led to novel isostructural CuI or AuI complexes. In situ deprotonation of the NHC salts in the presence of a copper(I) source, provides a library of new CuI complexes. The solid-state structures feature large N-CNHC -N angles (118-128°) and almost identical angles between the aryl groups on the nitrogen atoms and the plane of the N-C-N unit of the carbene (i.e. torsion angles close to 0°). Among the steric parameters, the percent buried volume (%Vbur ) values span easily in the 50-57 % range, and that one of (9-Dipp)CuBr complex (%Vbur =57.5) overcomes to other known erNHC-metal complexes reported to date. Preliminary catalytic experiments in the copper-catalyzed coupling between N-tosylhydrazone and phenylacetylene, afforded 76-93 % product at the 0.5-2.5 mol % catalyst loading, proving the stability of CuI erNHC complexes at elevated temperatures (100 °C).
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Affiliation(s)
| | - Frank Rominger
- Organisch-Chemisches InstitutHeidelberg UniversityIm Neuenheimer Feld 27069120HeidelbergGermany
| | - A. Stephen K. Hashmi
- Organisch-Chemisches InstitutHeidelberg UniversityIm Neuenheimer Feld 27069120HeidelbergGermany
- Chemistry DepartmentFaculty of ScienceKing Abdulaziz UniversityJeddah21589Saudi Arabia
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12
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Jazzar R, Soleilhavoup M, Bertrand G. Cyclic (Alkyl)- and (Aryl)-(amino)carbene Coinage Metal Complexes and Their Applications. Chem Rev 2020; 120:4141-4168. [DOI: 10.1021/acs.chemrev.0c00043] [Citation(s) in RCA: 131] [Impact Index Per Article: 32.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Rodolphe Jazzar
- UCSD-CNRS Joint Research Laboratory (UMI 3555), Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093-0358, United States
| | - Michele Soleilhavoup
- UCSD-CNRS Joint Research Laboratory (UMI 3555), Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093-0358, United States
| | - Guy Bertrand
- UCSD-CNRS Joint Research Laboratory (UMI 3555), Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093-0358, United States
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13
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Yazdani S, Junor GP, Peltier JL, Gembicky M, Jazzar R, Grotjahn DB, Bertrand G. Influence of Carbene and Phosphine Ligands on the Catalytic Activity of Gold Complexes in the Hydroamination and Hydrohydrazination of Alkynes. ACS Catal 2020. [DOI: 10.1021/acscatal.0c01352] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Sima Yazdani
- UCSD-CNRS Joint Research Laboratory (UMI 3555), Department of Chemistry and Biochemistry, University of California, La Jolla, San Diego, California 92093-0358, United States
- Department of Chemistry and Biochemistry, San Diego State University, 5500 Campanile Drive, San Diego, California 92182-1030, United States
| | - Glen P. Junor
- UCSD-CNRS Joint Research Laboratory (UMI 3555), Department of Chemistry and Biochemistry, University of California, La Jolla, San Diego, California 92093-0358, United States
| | - Jesse L. Peltier
- UCSD-CNRS Joint Research Laboratory (UMI 3555), Department of Chemistry and Biochemistry, University of California, La Jolla, San Diego, California 92093-0358, United States
| | - Milan Gembicky
- UCSD-CNRS Joint Research Laboratory (UMI 3555), Department of Chemistry and Biochemistry, University of California, La Jolla, San Diego, California 92093-0358, United States
| | - Rodolphe Jazzar
- UCSD-CNRS Joint Research Laboratory (UMI 3555), Department of Chemistry and Biochemistry, University of California, La Jolla, San Diego, California 92093-0358, United States
| | - Douglas B. Grotjahn
- Department of Chemistry and Biochemistry, San Diego State University, 5500 Campanile Drive, San Diego, California 92182-1030, United States
| | - Guy Bertrand
- UCSD-CNRS Joint Research Laboratory (UMI 3555), Department of Chemistry and Biochemistry, University of California, La Jolla, San Diego, California 92093-0358, United States
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14
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Zimin DP, Dar'in DV, Eliseeva AA, Novikov AS, Rassadin VA, Kukushkin VY. Gold-Catalyzed Functionalization of Semicarbazides with Terminal Alkynes to Achieve Substituted Semicarbazones. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901108] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Dmitry P. Zimin
- Institute of Chemistry; Saint Petersburg State University; Universitetskaya Nab. 7/9 199034 Saint Petersburg Russian Federation
| | - Dmitry V. Dar'in
- Institute of Chemistry; Saint Petersburg State University; Universitetskaya Nab. 7/9 199034 Saint Petersburg Russian Federation
| | - Anastasiya A. Eliseeva
- Institute of Chemistry; Saint Petersburg State University; Universitetskaya Nab. 7/9 199034 Saint Petersburg Russian Federation
| | - Alexander S. Novikov
- Institute of Chemistry; Saint Petersburg State University; Universitetskaya Nab. 7/9 199034 Saint Petersburg Russian Federation
| | - Valentin A. Rassadin
- Institute of Chemistry; Saint Petersburg State University; Universitetskaya Nab. 7/9 199034 Saint Petersburg Russian Federation
| | - Vadim Yu. Kukushkin
- Institute of Chemistry; Saint Petersburg State University; Universitetskaya Nab. 7/9 199034 Saint Petersburg Russian Federation
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15
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Praveen C. Carbophilic activation of π-systems via gold coordination: Towards regioselective access of intermolecular addition products. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.04.010] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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16
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Kazeminejad N, Münzfeld L, Gamer MT, Roesky PW. Mono- and bimetallic amidinate samarium complexes - synthesis, structure, and hydroamination catalysis. Dalton Trans 2019; 48:8153-8160. [PMID: 31070636 DOI: 10.1039/c9dt01418g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
In order to investigate the difference between mono- and bimetallic systems in the catalytic hydroamination/cyclization reaction two mono- and bimetallic amidinate samarium catalysts, featuring comparable coordination environments, were synthesized. Both systems comprise two {N(SiMe3)2}- leaving groups to minimize the steric influence of the corresponding amidinate ligand. The bimetallic system is based on a bis(amidinate) 4,6-dibenzofuran derivative, while N,N'-bis(2,6-diisopropylphenyl)benzamidinate was employed as ligand for the monometallic catalyst. For the hydroamination/cyclization reaction five different substrates were investigated. Additionally, kinetic studies were carried out to gain deeper understanding of the mechanism.
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Affiliation(s)
- Neda Kazeminejad
- Institut für Anorganische Chemie, Karlsruher Institut für Technologie (KIT), Engesserstr. 15, Geb. 30.45, 76131 Karlsruhe, Germany.
| | - Luca Münzfeld
- Institut für Anorganische Chemie, Karlsruher Institut für Technologie (KIT), Engesserstr. 15, Geb. 30.45, 76131 Karlsruhe, Germany.
| | - Michael T Gamer
- Institut für Anorganische Chemie, Karlsruher Institut für Technologie (KIT), Engesserstr. 15, Geb. 30.45, 76131 Karlsruhe, Germany.
| | - Peter W Roesky
- Institut für Anorganische Chemie, Karlsruher Institut für Technologie (KIT), Engesserstr. 15, Geb. 30.45, 76131 Karlsruhe, Germany.
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Zhang P, Yamamoto T, Suginome M. Helical Poly(quinoxaline‐2,3‐diyl)s Bearing 1,2,3‐Triazole Pendants: Synthesis by CuAAC and Use as Reusable Abnormal NHC Ligands in Gold Catalysis. ChemCatChem 2018. [DOI: 10.1002/cctc.201801361] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Pinglu Zhang
- Department of Synthetic Chemistry and Biological Chemistry Graduate School of EngineeringKyoto University Katsura 615-8510 Japan
| | - Takeshi Yamamoto
- Department of Synthetic Chemistry and Biological Chemistry Graduate School of EngineeringKyoto University Katsura 615-8510 Japan
| | - Michinori Suginome
- Department of Synthetic Chemistry and Biological Chemistry Graduate School of EngineeringKyoto University Katsura 615-8510 Japan
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18
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Zimin DP, Dar’in DV, Rassadin VA, Kukushkin VY. Gold-Catalyzed Hydrohydrazidation of Terminal Alkynes. Org Lett 2018; 20:4880-4884. [DOI: 10.1021/acs.orglett.8b02019] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Dmitry P. Zimin
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya Nab. 7/9, 199034 Saint Petersburg, Russia
| | - Dmitry V. Dar’in
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya Nab. 7/9, 199034 Saint Petersburg, Russia
| | - Valentin A. Rassadin
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya Nab. 7/9, 199034 Saint Petersburg, Russia
| | - Vadim Yu. Kukushkin
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya Nab. 7/9, 199034 Saint Petersburg, Russia
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Hernán-Gómez A, Uzelac M, Baillie SE, Armstrong DR, Kennedy AR, Fuentes MÁ, Hevia E. Molecular Manipulations of a Utility Nitrogen-Heterocyclic Carbene by Sodium Magnesiate Complexes and Transmetallation Chemistry with Gold Complexes. Chemistry 2018; 24:10541-10549. [PMID: 29750849 DOI: 10.1002/chem.201802008] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2018] [Indexed: 01/17/2023]
Abstract
Expanding the scope and applications of anionic N-heterocyclic carbenes (NHCs), a novel series of magnesium NHC complexes is reported using a mixed sodium-magnesium approach. Sequential reactivity of classical imidazol- 2-ylidene carbene IPr with NaR and MgR2 (R=CH2 SiMe3 ) affords [(THF)3 Na(μ-IPr- )MgR2 (THF)] (2) [IPr- =:C{[N(2,6-iPr2 C6 H3 )]2 CHC] containing an anionic NHC ligand, whereas surprisingly sodium magnesiate [NaMgR3 ] fails to deprotonate IPr affording instead the redistribution coordination adduct [IPr2 Na2 MgR4 ] (1). Compound 2 undergoes selective C2-methylation when treated with MeOTf furnishing novel abnormal NHC complex [{aIPrMe MgR2 }2 ] (3). Dissolving 3 in THF led to the dissociation of this complex into MgR2 and aIPrMe with the latter isomerizing to the olefinic NHC IPr=CH2 . The ability of 2 and 3 to transfer their anionic and abnormal NHC ligands, respectively to AuI metal fragments has been investigated allowing the isolation and structural characterization of [RAu(μ-IPr- )MgR(THF)2 ] (4) and [aIPrMe AuR] (5) respectively. In both cases transfer of an alkyl R group is observed. However while 3 can also transfer its abnormal NHC ligand to give 5, in 4 the anionic NHC still remains coordinated to Mg via its C4 position, whereas the {AuR} fragment occupies the C2 position previously filled by a donor-solvated {Na(THF)3 }+ cation.
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Affiliation(s)
- Alberto Hernán-Gómez
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, UK
| | - Marina Uzelac
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, UK
| | - Sharon E Baillie
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, UK
| | - David R Armstrong
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, UK
| | - Alan R Kennedy
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, UK
| | - M Ángeles Fuentes
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, UK
| | - Eva Hevia
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, UK
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20
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Rottschäfer D, Ebeler F, Strothmann T, Neumann B, Stammler HG, Mix A, Ghadwal RS. The Viability of C5-Protonated- and C4,C5-Ditopic Carbanionic Abnormal NHCs: A New Dimension in NHC Chemistry. Chemistry 2018; 24:3716-3720. [DOI: 10.1002/chem.201800260] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Indexed: 01/10/2023]
Affiliation(s)
- Dennis Rottschäfer
- Anorganische Molekülchemie und Katalyse, Lehrstuhl für, Anorganische Chemie und Strukturchemie, Centrum für, Molekulare Materialien, Fakultät für Chemie; Universität Bielefeld; Universitätsstr. 25 33615 Bielefeld Germany
| | - Falk Ebeler
- Anorganische Molekülchemie und Katalyse, Lehrstuhl für, Anorganische Chemie und Strukturchemie, Centrum für, Molekulare Materialien, Fakultät für Chemie; Universität Bielefeld; Universitätsstr. 25 33615 Bielefeld Germany
| | - Till Strothmann
- Anorganische Molekülchemie und Katalyse, Lehrstuhl für, Anorganische Chemie und Strukturchemie, Centrum für, Molekulare Materialien, Fakultät für Chemie; Universität Bielefeld; Universitätsstr. 25 33615 Bielefeld Germany
| | - Beate Neumann
- Anorganische Molekülchemie und Katalyse, Lehrstuhl für, Anorganische Chemie und Strukturchemie, Centrum für, Molekulare Materialien, Fakultät für Chemie; Universität Bielefeld; Universitätsstr. 25 33615 Bielefeld Germany
| | - Hans-Georg Stammler
- Anorganische Molekülchemie und Katalyse, Lehrstuhl für, Anorganische Chemie und Strukturchemie, Centrum für, Molekulare Materialien, Fakultät für Chemie; Universität Bielefeld; Universitätsstr. 25 33615 Bielefeld Germany
| | - Andreas Mix
- Anorganische Molekülchemie und Katalyse, Lehrstuhl für, Anorganische Chemie und Strukturchemie, Centrum für, Molekulare Materialien, Fakultät für Chemie; Universität Bielefeld; Universitätsstr. 25 33615 Bielefeld Germany
| | - Rajendra S. Ghadwal
- Anorganische Molekülchemie und Katalyse, Lehrstuhl für, Anorganische Chemie und Strukturchemie, Centrum für, Molekulare Materialien, Fakultät für Chemie; Universität Bielefeld; Universitätsstr. 25 33615 Bielefeld Germany
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21
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Flores-Jarillo M, Salazar-Pereda V, Ruiz-Mendoza FJ, Alvarez-Hernández A, Suarez-Castillo OR, Mendoza-Espinosa D. Expedient Synthesis of Highly Functionalized Abnormal Carbenegold(I) Complexes. Inorg Chem 2018; 57:28-31. [PMID: 29227652 DOI: 10.1021/acs.inorgchem.7b02774] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The reaction of 4-substituted imidazol-2-ylidenes with various electrophiles produces a series of 2,4-functionalized imidazolium salts. Subsequent metalation of these precursors using AuCl(SMe2) provides the first examples of highly functionalized abnormal carbenegold(I) complexes. The present protocol introduces a new strategy for the synthesis of metallic abnormal carbenes featuring diverse functional groups.
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Affiliation(s)
- Mariana Flores-Jarillo
- Área Académica de Química, Universidad Autónoma del Estado de Hidalgo , Carretera Pachuca-Tulancingo Km 4.5, Mineral de la Reforma, Hidalgo 42090, México
| | - Verónica Salazar-Pereda
- Área Académica de Química, Universidad Autónoma del Estado de Hidalgo , Carretera Pachuca-Tulancingo Km 4.5, Mineral de la Reforma, Hidalgo 42090, México
| | - Francisco J Ruiz-Mendoza
- Área Académica de Química, Universidad Autónoma del Estado de Hidalgo , Carretera Pachuca-Tulancingo Km 4.5, Mineral de la Reforma, Hidalgo 42090, México
| | - Alejandro Alvarez-Hernández
- Área Académica de Química, Universidad Autónoma del Estado de Hidalgo , Carretera Pachuca-Tulancingo Km 4.5, Mineral de la Reforma, Hidalgo 42090, México
| | - Oscar R Suarez-Castillo
- Área Académica de Química, Universidad Autónoma del Estado de Hidalgo , Carretera Pachuca-Tulancingo Km 4.5, Mineral de la Reforma, Hidalgo 42090, México
| | - Daniel Mendoza-Espinosa
- Área Académica de Química, Universidad Autónoma del Estado de Hidalgo , Carretera Pachuca-Tulancingo Km 4.5, Mineral de la Reforma, Hidalgo 42090, México
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22
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Zargaran P, Wurm T, Zahner D, Schießl J, Rudolph M, Rominger F, Hashmi ASK. A Structure-Based Activity Study of Highly Active Unsymmetrically Substituted NHC Gold(I) Catalysts. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201701080] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Poorya Zargaran
- Organisch-Chemisches Institut; Heidelberg University; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Thomas Wurm
- Organisch-Chemisches Institut; Heidelberg University; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - David Zahner
- Organisch-Chemisches Institut; Heidelberg University; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Jasmin Schießl
- Organisch-Chemisches Institut; Heidelberg University; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Matthias Rudolph
- Organisch-Chemisches Institut; Heidelberg University; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Frank Rominger
- Organisch-Chemisches Institut; Heidelberg University; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - A. Stephen K. Hashmi
- Organisch-Chemisches Institut; Heidelberg University; Im Neuenheimer Feld 270 69120 Heidelberg Germany
- Chemistry Department, Faculty of Science; King Abdulaziz University; Jeddah 21589 Saudi Arabia
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23
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Flores-Jarillo M, Mendoza-Espinosa D, Salazar-Pereda V, González-Montiel S. Synthesis and Catalytic Benefits of Tetranuclear Gold(I) Complexes with a C4-Symmetric Tetratriazol-5-ylidene. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00712] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Mariana Flores-Jarillo
- Área Académica
de Quı́mica, Universidad Autónoma del Estado de Hidalgo, Carretera Pachuca-Tulancingo Km 4.5, Mineral
de la Reforma, Hidalgo, México 42090
| | - Daniel Mendoza-Espinosa
- Área Académica
de Quı́mica, CONACYT, Universidad Autónoma del Estado de Hidalgo, Carretera
Pachuca-Tulancingo Km 4.5, Mineral de la Reforma, Hidalgo, México 42090
| | - Verónica Salazar-Pereda
- Área Académica
de Quı́mica, Universidad Autónoma del Estado de Hidalgo, Carretera Pachuca-Tulancingo Km 4.5, Mineral
de la Reforma, Hidalgo, México 42090
| | - Simplicio González-Montiel
- Área Académica
de Quı́mica, Universidad Autónoma del Estado de Hidalgo, Carretera Pachuca-Tulancingo Km 4.5, Mineral
de la Reforma, Hidalgo, México 42090
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24
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Hu Z, Dong J, Xu X. Silver-Catalyzed [3+2] Cycloaddition of Azomethine Ylides with Isocyanides for Imidazole Synthesis. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700447] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Zhongyan Hu
- Jilin Province Key Laboratory of Organic Functional Molecular Design and Synthesis, Department of Chemistry; Northeast Normal University; Changchun 130024 People's Republic of China
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Institute of Molecular and Nano Science; Shandong Normal University; Jinan 250014 People's Republic of China
| | - Jinhuan Dong
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Institute of Molecular and Nano Science; Shandong Normal University; Jinan 250014 People's Republic of China
| | - Xianxiu Xu
- Jilin Province Key Laboratory of Organic Functional Molecular Design and Synthesis, Department of Chemistry; Northeast Normal University; Changchun 130024 People's Republic of China
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Institute of Molecular and Nano Science; Shandong Normal University; Jinan 250014 People's Republic of China
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25
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Rotta-Loria NL, Chisholm AJ, MacQueen PM, McDonald R, Ferguson MJ, Stradiotto M. Exploring the Influence of Phosphine Ligation on the Gold-Catalyzed Hydrohydrazination of Terminal Alkynes at Room Temperature. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00373] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Nicolas L. Rotta-Loria
- Department
of Chemistry, Dalhousie University, 6274 Coburg Road, P.O. Box 15000, Halifax, Nova Scotia B3H 4R2, Canada
| | - Alicia J. Chisholm
- Department
of Chemistry, Dalhousie University, 6274 Coburg Road, P.O. Box 15000, Halifax, Nova Scotia B3H 4R2, Canada
| | - Preston M. MacQueen
- Department
of Chemistry, Dalhousie University, 6274 Coburg Road, P.O. Box 15000, Halifax, Nova Scotia B3H 4R2, Canada
| | - Robert McDonald
- X-Ray
Crystallography Laboratory, Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Michael J. Ferguson
- X-Ray
Crystallography Laboratory, Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Mark Stradiotto
- Department
of Chemistry, Dalhousie University, 6274 Coburg Road, P.O. Box 15000, Halifax, Nova Scotia B3H 4R2, Canada
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26
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Wurm T, Hornung J, O'Neill M, Rudolph M, Rominger F, Hashmi ASK. Synthesis of Ester- and Phosphonate-Functionalized Au I -Imidazolylidene Chlorides through the Isonitrile Route. Chemistry 2017; 23:5143-5147. [PMID: 28236328 DOI: 10.1002/chem.201700214] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2017] [Indexed: 11/10/2022]
Abstract
Starting from DMSAuCl, isonitriles and functionalized propargylammonium salts in the presence of simple trimethylamine as auxiliary base, unsymmetrically substituted ester- and phosphonate-functionalized AuI -imidazolylidene complexes were synthesized in an easy-to-use modular one-pot template synthesis. In the course of the reaction, after the initial nucleophilic addition of the amine to the gold(I)-activated isonitrile, a Michael addition closes the N-heterocyclic carbene (NHC) ring. Then the remaining double bond migrates into the NHC ring, evidently a more stable position than the initial exocyclic double bond. These functional groups attached to the back bone of the NHC ligands represent ideal handles for a further modification of the system, for example an attachment to larger assemblies or heterogenization by an attachment to surfaces are conceivable.
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Affiliation(s)
- Thomas Wurm
- Organisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Julius Hornung
- Organisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Matthew O'Neill
- Organisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Matthias Rudolph
- Organisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Frank Rominger
- Organisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - A Stephen K Hashmi
- Organisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany.,Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
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27
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El-Azab AS, Ghabbour HA, El-Husseiny WM, Maarouf AR, Mohamed MA, Abdel-Aziz AAM. Lewis acid-promoted direct synthesis of N-unsubstituted hydrazones via the reaction of hydrazine with acetophenone and isatin derivatives. RUSS J GEN CHEM+ 2017. [DOI: 10.1134/s1070363216120471] [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]
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28
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Kuznetsov ML, Kukushkin VY. Diversity of reactivity modes upon interplay between Au(iii)-bound isocyanides and cyclic nitrones: a theoretical consideration. Dalton Trans 2017; 46:786-802. [PMID: 28001162 DOI: 10.1039/c6dt03840a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Metal-bound isocyanides demonstrate a very rich chemistry towards 1,3-dipoles of the allyl anion type such as nitrones. Depending on the metal centre, dipole nature and substituent in isocyanides, cycloadducts, imine + isocyanates or metallacycles may be formed. In this work, the reasons for such diversity, intimate details of the reaction mechanism and main factors determining the chemoselectivity in the reaction between Au(iii)-bound isocyanides ([AuCl3(C[triple bond, length as m-dash]NR)]) and cyclic nitrones -O-N[combining low line]+[double bond, length as m-dash]C(H)XXX[combining low line] (XXX = CH2CH2CMe2, CH2CH2CH2, OCH2CMe2, CH2OCMe2 and CH2CH2O) are analysed in detail by theoretical (DFT) methods. The formation of cycloadducts is controlled by the LUMOπ*(C[triple bond, length as m-dash]N) of isocyanides and it occurs in a stepwise manner via the initial nucleophilic addition of nitrone at the C atom of C[triple bond, length as m-dash]NR (except for nitronate -O-N[combining low line]+[double bond, length as m-dash]C(H)CH2CH2O[combining low line]). The imine + isocyanate products are formed upon oxygen transfer from nitrones to isocyanides, and N-O bond cleavage is the main factor determining this process. A metallacycle is formed upon decomposition of the cycloadduct, and this process includes deprotonation of the oxadiazoline CH group/N-O bond cleavage and Cl- elimination/cyclization. The main factor controlling the metallacycle formation is the acidity of the endocyclic CH group in the cycloadduct. Effects of the substituent R in C[triple bond, length as m-dash]NR and the nitrone nature on the reactivity are analysed.
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Affiliation(s)
- Maxim L Kuznetsov
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal. and International Group on Organometallic Chemistry, Institute of Chemistry, Saint Petersburg State University, 199034, Universitetskaya Nab., 7/9, Saint Petersburg, Russian Federation
| | - Vadim Yu Kukushkin
- International Group on Organometallic Chemistry, Institute of Chemistry, Saint Petersburg State University, 199034, Universitetskaya Nab., 7/9, Saint Petersburg, Russian Federation
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29
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Mendoza-Espinosa D, Rendón-Nava D, Alvarez-Hernández A, Angeles-Beltrán D, Negrón-Silva GE, Suárez-Castillo OR. Visible-Light-Promoted AuIto AuIIIOxidation in Triazol-5-ylidene Complexes. Chem Asian J 2016; 12:203-207. [DOI: 10.1002/asia.201601499] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Revised: 11/22/2016] [Indexed: 12/26/2022]
Affiliation(s)
- Daniel Mendoza-Espinosa
- Departamento de Ciencias Básicas; Universidad Autónoma Metropolitana-Azcapotzalco; Avenida San Pablo No. 180 Cuidad de México 02200 México
| | - David Rendón-Nava
- Departamento de Ciencias Básicas; Universidad Autónoma Metropolitana-Azcapotzalco; Avenida San Pablo No. 180 Cuidad de México 02200 México
| | - Alejandro Alvarez-Hernández
- Área Académica de Química; Universidad Autónoma del Estado de Hidalgo; Carretera Pachuca-Tulancingo Km. 4.5, Mineral de la Reforma Hidalgo 42090 México
| | - Deyanira Angeles-Beltrán
- Departamento de Ciencias Básicas; Universidad Autónoma Metropolitana-Azcapotzalco; Avenida San Pablo No. 180 Cuidad de México 02200 México
| | - Guillermo E. Negrón-Silva
- Departamento de Ciencias Básicas; Universidad Autónoma Metropolitana-Azcapotzalco; Avenida San Pablo No. 180 Cuidad de México 02200 México
| | - Oscar R. Suárez-Castillo
- Área Académica de Química; Universidad Autónoma del Estado de Hidalgo; Carretera Pachuca-Tulancingo Km. 4.5, Mineral de la Reforma Hidalgo 42090 México
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30
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Hettmanczyk L, Schulze D, Suntrup L, Sarkar B. Mono- and Digold(I) Complexes with Mesoionic Carbenes: Structural Characterization and Use in Catalytic Silver-Free Oxazoline Formation. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00675] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Lara Hettmanczyk
- Institut
für Chemie
und Biochemie, Freie Universität Berlin, Fabeckstraße
34-36, D-14195, Berlin. Germany
| | - Dennis Schulze
- Institut
für Chemie
und Biochemie, Freie Universität Berlin, Fabeckstraße
34-36, D-14195, Berlin. Germany
| | - Lisa Suntrup
- Institut
für Chemie
und Biochemie, Freie Universität Berlin, Fabeckstraße
34-36, D-14195, Berlin. Germany
| | - Biprajit Sarkar
- Institut
für Chemie
und Biochemie, Freie Universität Berlin, Fabeckstraße
34-36, D-14195, Berlin. Germany
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31
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Brunner TS, Benndorf P, Gamer MT, Knöfel N, Gugau K, Roesky PW. Enantiopure Amidinate Complexes of the Rare-Earth Elements. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00523] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Tobias S. Brunner
- Institut für Anorganische
Chemie, Karlsruher Institut für Technologie (KIT), Engesserstraße
15, 76131 Karlsruhe, Germany
| | - Paul Benndorf
- Institut für Anorganische
Chemie, Karlsruher Institut für Technologie (KIT), Engesserstraße
15, 76131 Karlsruhe, Germany
| | - Michael T. Gamer
- Institut für Anorganische
Chemie, Karlsruher Institut für Technologie (KIT), Engesserstraße
15, 76131 Karlsruhe, Germany
| | - Nicolai Knöfel
- Institut für Anorganische
Chemie, Karlsruher Institut für Technologie (KIT), Engesserstraße
15, 76131 Karlsruhe, Germany
| | - Katharina Gugau
- Institut für Anorganische
Chemie, Karlsruher Institut für Technologie (KIT), Engesserstraße
15, 76131 Karlsruhe, Germany
| | - Peter W. Roesky
- Institut für Anorganische
Chemie, Karlsruher Institut für Technologie (KIT), Engesserstraße
15, 76131 Karlsruhe, Germany
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32
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Rottschäfer D, Schürmann CJ, Lamm JH, Paesch AN, Neumann B, Ghadwal RS. Abnormal-NHC Palladium(II) Complexes: Rational Synthesis, Structural Elucidation, and Catalytic Activity. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00662] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
| | - Christian J. Schürmann
- Institut
für Anorganische Chemie, Georg-August-Universität Göttingen, Tammannstrasse
4, D-37077 Göttingen, Germany
| | | | - Alexander N. Paesch
- Institut
für Anorganische Chemie, Georg-August-Universität Göttingen, Tammannstrasse
4, D-37077 Göttingen, Germany
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33
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Mokar BD, Huple DB, Liu RS. Gold-catalyzed Intermolecular Oxidations of 2-Ketonyl-1-ethynyl Benzenes with N-Hydoxyanilines to Yield 2-Aminoindenones via Gold Carbene Intermediates. Angew Chem Int Ed Engl 2016; 55:11892-6. [DOI: 10.1002/anie.201606467] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Indexed: 11/07/2022]
Affiliation(s)
| | - Deepak B. Huple
- Department of Chemistry; National Tsing-Hua University; Hsinchu 30013, Taiwan ROC
| | - Rai-Shung Liu
- Department of Chemistry; National Tsing-Hua University; Hsinchu 30013, Taiwan ROC
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34
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Mokar BD, Huple DB, Liu RS. Gold-catalyzed Intermolecular Oxidations of 2-Ketonyl-1-ethynyl Benzenes with N-Hydoxyanilines to Yield 2-Aminoindenones via Gold Carbene Intermediates. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201606467] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
| | - Deepak B. Huple
- Department of Chemistry; National Tsing-Hua University; Hsinchu 30013, Taiwan ROC
| | - Rai-Shung Liu
- Department of Chemistry; National Tsing-Hua University; Hsinchu 30013, Taiwan ROC
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35
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Pretorius R, Fructos MR, Müller-Bunz H, Gossage RA, Pérez PJ, Albrecht M. Synthesis and catalytic applications of 1,2,3-triazolylidene gold(i) complexes in silver-free oxazoline syntheses and C-H bond activation. Dalton Trans 2016; 45:14591-602. [PMID: 27363515 DOI: 10.1039/c6dt02181f] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A series of novel 1,2,3-triazolylidene gold(i) chloride complexes have been synthesised and fully characterised. Silver-free methodologies for chloride ion abstraction of these complexes were evaluated for their potential as Au-based catalyst precursors. Using simple potassium salts or MeOTf as chloride scavengers produced metal complexes that catalyse both the regioselective synthesis of oxazolines and the C-H activation of benzene or styrene for carbene transfer from ethyl diazoacetate. These results indicate that Ag-free activation of 1,2,3-triazolylidene gold(i) chloride complexes is feasible for the generation of catalytically active Au triazolylidene species. However, silver-mediated activation imparts substantially higher catalytic activity in oxazoline synthesis.
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Affiliation(s)
- René Pretorius
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland.
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36
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Singh RR, Liu RS. Gold-Catalyzed Imination/Mannich Reaction Cascades of 3-En-1-ynamides with Anilines and Aldehydes to Enable 1,5-Nitrogen Functionalizations. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600072] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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37
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Wurm T, Mulks F, Böhling CRN, Riedel D, Zargaran P, Rudolph M, Rominger F, Hashmi ASK. Synthesis of Different Classes of Six-Membered Gold(I) NHC Complexes by the Isonitrile Route. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00023] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
| | | | | | | | | | | | | | - A. Stephen K. Hashmi
- Chemistry
Department, King Abdulaziz University (KAU), Jeddah 21589, Saudi Arabia
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38
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Morozov OS, Gribanov PS, Asachenko AF, Dorovatovskii PV, Khrustalev VN, Rybakov VB, Nechaev MS. Hydrohydrazination of Arylalkynes Catalyzed by an Expanded Ring N-Heterocyclic Carbene (er-NHC) Gold Complex Under Solvent-Free Conditions. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201500658] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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39
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Hu X, Martin D, Bertrand G. Room temperature hydroamination of alkynes with anilines catalyzed by anti-Bredt di(amino)carbene gold(i) complexes. NEW J CHEM 2016. [DOI: 10.1039/c6nj00980h] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Anti-Bredt di(amino)carbene gold(i) complexes are excellent precatalysts for the room temperature hydroamination of terminal alkynes with a variety anilines and hydrazines.
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Affiliation(s)
- Xingbang Hu
- UCSD-CNRS Joint Research Laboratory (UMI 3555)
- Department of Chemistry and Biochemistry
- University of California
- San DiegoLa Jolla
- USA
| | - David Martin
- UCSD-CNRS Joint Research Laboratory (UMI 3555)
- Department of Chemistry and Biochemistry
- University of California
- San DiegoLa Jolla
- USA
| | - Guy Bertrand
- UCSD-CNRS Joint Research Laboratory (UMI 3555)
- Department of Chemistry and Biochemistry
- University of California
- San DiegoLa Jolla
- USA
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40
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Peltier JL, Jazzar R, Melaimi M, Bertrand G. Ancillary ligand-free copper catalysed hydrohydrazination of terminal alkynes with NH2NH2. Chem Commun (Camb) 2016; 52:2733-5. [DOI: 10.1039/c5cc10427k] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An atom-efficient route for the formation of CN bonds containing products from bulk materials and a cheap catalyst.
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Affiliation(s)
- Jesse L. Peltier
- UCSD-CNRS Joint Research Laboratory (UMI 3555)
- Department of Chemistry and Biochemistry
- University of California
- San Diego
- La Jolla
| | - Rodolphe Jazzar
- UCSD-CNRS Joint Research Laboratory (UMI 3555)
- Department of Chemistry and Biochemistry
- University of California
- San Diego
- La Jolla
| | - Mohand Melaimi
- UCSD-CNRS Joint Research Laboratory (UMI 3555)
- Department of Chemistry and Biochemistry
- University of California
- San Diego
- La Jolla
| | - Guy Bertrand
- UCSD-CNRS Joint Research Laboratory (UMI 3555)
- Department of Chemistry and Biochemistry
- University of California
- San Diego
- La Jolla
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41
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Jin L, Melaimi M, Kostenko A, Karni M, Apeloig Y, Moore CE, Rheingold AL, Bertrand G. Isolation of cationic and neutral (allenylidene)(carbene) and bis(allenylidene)gold complexes. Chem Sci 2016; 7:150-154. [PMID: 28966767 PMCID: PMC5580305 DOI: 10.1039/c5sc03654b] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2015] [Accepted: 11/14/2015] [Indexed: 12/05/2022] Open
Abstract
The one-electron reduction of a cationic (allenylidene)[cyclic(alkyl) (amino)carbene]gold(i) complex leads to the corresponding neutral, paramagnetic, formally gold(0) complex. DFT calculations reveal that the spin density of this highly robust coinage metal complex is mainly located on the allenylidene fragment, with only 1.8 and 3.1% on the gold center and the CAAC ligand, respectively. In addition, the first homoleptic bis(allenylidene)gold(i) complex has been prepared and fully characterized.
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Affiliation(s)
- Liqun Jin
- UCSD-CNRS Joint Research Chemistry Laboratory (UMI 3555) , Department of Chemistry and Biochemistry , University of California San Diego , La Jolla , CA 92093-0358 , USA .
| | - Mohand Melaimi
- UCSD-CNRS Joint Research Chemistry Laboratory (UMI 3555) , Department of Chemistry and Biochemistry , University of California San Diego , La Jolla , CA 92093-0358 , USA .
| | - Arseni Kostenko
- Schulich Faculty of Chemistry , Technion - Israel Institute of Technology , Haifa 32000 , Israel
| | - Miriam Karni
- Schulich Faculty of Chemistry , Technion - Israel Institute of Technology , Haifa 32000 , Israel
| | - Yitzhak Apeloig
- Schulich Faculty of Chemistry , Technion - Israel Institute of Technology , Haifa 32000 , Israel
| | - Curtis E Moore
- UCSD-CNRS Joint Research Chemistry Laboratory (UMI 3555) , Department of Chemistry and Biochemistry , University of California San Diego , La Jolla , CA 92093-0358 , USA .
| | - Arnold L Rheingold
- UCSD-CNRS Joint Research Chemistry Laboratory (UMI 3555) , Department of Chemistry and Biochemistry , University of California San Diego , La Jolla , CA 92093-0358 , USA .
| | - Guy Bertrand
- UCSD-CNRS Joint Research Chemistry Laboratory (UMI 3555) , Department of Chemistry and Biochemistry , University of California San Diego , La Jolla , CA 92093-0358 , USA .
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42
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Xu Y, Hu X, Zhang S, Xi X, Wu Y. Room-Temperature Hydration of Alkynes Catalyzed by Different Carbene Gold Complexes and their Precursors. ChemCatChem 2015. [DOI: 10.1002/cctc.201501065] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Yun Xu
- School of Chemistry and Chemical Engineering; Nanjing University; Nanjing 211198 P.R. China
- China Pharmaceutical University; Nanjing 211198 P.R. China
| | - Xingbang Hu
- School of Chemistry and Chemical Engineering; Nanjing University; Nanjing 211198 P.R. China
| | - Shufeng Zhang
- School of Chemistry and Chemical Engineering; Nanjing University; Nanjing 211198 P.R. China
| | - Xiuxing Xi
- School of Chemistry and Chemical Engineering; Nanjing University; Nanjing 211198 P.R. China
| | - Youting Wu
- School of Chemistry and Chemical Engineering; Nanjing University; Nanjing 211198 P.R. China
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43
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Lothschütz C, Wurm T, Zeiler A, Freiherr V Falkenhausen A, Rudolph M, Rominger F, Hashmi ASK. Facile Synthesis of Functionalized Carbene Metal Complexes from Coordinated Isonitriles. Chem Asian J 2015; 11:342-6. [PMID: 26033484 DOI: 10.1002/asia.201500353] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2015] [Revised: 05/15/2015] [Indexed: 11/11/2022]
Abstract
The scope and limitations of the isonitrile-based NHC template synthesis were investigated with a series of precursors containing a nucleophilic amine in combination with tethered electrophiles. In the case of alkynes and phosphonic esters as electrophiles no ring closure was observed and new functionalized NAC gold complexes were obtained. By the use of unsaturated esters and phosphonic esters as Michael acceptors in the amine precursors, ester-modified gold and palladium NHC complexes were accessible in high efficiency.
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Affiliation(s)
- Christian Lothschütz
- Organisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany), Fax: (+49) 06221-54-4205
| | - Thomas Wurm
- Organisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany), Fax: (+49) 06221-54-4205
| | - Anna Zeiler
- Organisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany), Fax: (+49) 06221-54-4205
| | - Alexander Freiherr V Falkenhausen
- Organisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany), Fax: (+49) 06221-54-4205
| | - Matthias Rudolph
- Organisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany), Fax: (+49) 06221-54-4205
| | - Frank Rominger
- Organisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany), Fax: (+49) 06221-54-4205
| | - A Stephen K Hashmi
- Organisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany), Fax: (+49) 06221-54-4205.
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44
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Riedel D, Wurm T, Graf K, Rudolph M, Rominger F, Hashmi ASK. From Isonitriles to Unsaturated NHC Complexes of Gold, Palladium and Platinum. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201401131] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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45
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Wegener M, Kirsch SF. The Reactivity of 4-Hydroxy- and 4-Silyloxy-1,5-allenynes with Homogeneous Gold(I) Catalysts. Org Lett 2015; 17:1465-8. [DOI: 10.1021/acs.orglett.5b00348] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michael Wegener
- Organic
Chemistry, Bergische Universität Wuppertal, Gaußstr.
20, 42119 Wuppertal, Germany
| | - Stefan F. Kirsch
- Organic
Chemistry, Bergische Universität Wuppertal, Gaußstr.
20, 42119 Wuppertal, Germany
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46
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Huang L, Arndt M, Gooßen K, Heydt H, Gooßen LJ. Late Transition Metal-Catalyzed Hydroamination and Hydroamidation. Chem Rev 2015; 115:2596-697. [DOI: 10.1021/cr300389u] [Citation(s) in RCA: 739] [Impact Index Per Article: 82.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Liangbin Huang
- Department of Chemistry, TU Kaiserslautern, Erwin-Schrödinger-Strasse Geb. 54, 67663 Kaiserslautern, Germany
| | - Matthias Arndt
- Department of Chemistry, TU Kaiserslautern, Erwin-Schrödinger-Strasse Geb. 54, 67663 Kaiserslautern, Germany
| | - Käthe Gooßen
- Department of Chemistry, TU Kaiserslautern, Erwin-Schrödinger-Strasse Geb. 54, 67663 Kaiserslautern, Germany
| | - Heinrich Heydt
- Department of Chemistry, TU Kaiserslautern, Erwin-Schrödinger-Strasse Geb. 54, 67663 Kaiserslautern, Germany
| | - Lukas J. Gooßen
- Department of Chemistry, TU Kaiserslautern, Erwin-Schrödinger-Strasse Geb. 54, 67663 Kaiserslautern, Germany
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47
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Tolentino DR, Jin L, Melaimi M, Bertrand G. Mesoionic Carbene‐Gold(I) Catalyzed Bis‐Hydrohydrazination of Alkynes with Parent Hydrazine. Chem Asian J 2015; 10:2139-42. [PMID: 25597889 DOI: 10.1002/asia.201403408] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Indexed: 11/11/2022]
Affiliation(s)
- Daniel R. Tolentino
- UCSD-CNRS Joint Research Chemistry Laboratory (UMI 3555) Department of Chemistry and Biochemistry University of California San Diego La Jolla CA 92093-0343 USA
| | - Liqun Jin
- UCSD-CNRS Joint Research Chemistry Laboratory (UMI 3555) Department of Chemistry and Biochemistry University of California San Diego La Jolla CA 92093-0343 USA
| | - Mohand Melaimi
- UCSD-CNRS Joint Research Chemistry Laboratory (UMI 3555) Department of Chemistry and Biochemistry University of California San Diego La Jolla CA 92093-0343 USA
| | - Guy Bertrand
- UCSD-CNRS Joint Research Chemistry Laboratory (UMI 3555) Department of Chemistry and Biochemistry University of California San Diego La Jolla CA 92093-0343 USA
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48
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Couce-Rios A, Kovács G, Ujaque G, Lledós A. Hydroamination of C–C Multiple Bonds with Hydrazine Catalyzed by N-Heterocyclic Carbene–Gold(I) Complexes: Substrate and Ligand Effects. ACS Catal 2015. [DOI: 10.1021/cs501705b] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Almudena Couce-Rios
- Departament de Química, Universitat Autònoma de Barcelona, 08193 Cerdanyola
del Vallès, Spain
| | - Gábor Kovács
- Departament de Química, Universitat Autònoma de Barcelona, 08193 Cerdanyola
del Vallès, Spain
| | - Gregori Ujaque
- Departament de Química, Universitat Autònoma de Barcelona, 08193 Cerdanyola
del Vallès, Spain
| | - Agustí Lledós
- Departament de Química, Universitat Autònoma de Barcelona, 08193 Cerdanyola
del Vallès, Spain
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49
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Han J, Lu Z, Wang W, Hammond GB, Xu B. Potassium tris(triflyl)methide (KCTf3): a broadly applicable promoter for cationic metal catalysis. Chem Commun (Camb) 2015; 51:13740-3. [DOI: 10.1039/c5cc05306d] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
KCTf3 enhanced the reaction rates and the chemical yields of a wide spectrum of cationic metal catalyzed reactions in consistent and significant manner. These reactions include traditional Lewis acid catalysis and transition metal catalysis. KCTf3 is an easily handled neutral salt that is commercially available.
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Affiliation(s)
- Junbin Han
- Department of Chemistry
- University of Louisville
- Louisville
- USA
| | - Zhichao Lu
- Department of Chemistry
- University of Louisville
- Louisville
- USA
| | - Weibo Wang
- Department of Chemistry
- University of Louisville
- Louisville
- USA
| | | | - Bo Xu
- College of Chemistry
- Chemical Engineering and Biotechnology
- Donghua University
- Shanghai 201620
- China
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50
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Bassaco MM, Fortes MP, Kaufman TS, Silveira CC. Metal-free synthesis of 3,5-disubstituted 1H- and 1-aryl-1H-pyrazoles from 1,3-diyne-indole derivatives employing two successive hydroaminations. RSC Adv 2015. [DOI: 10.1039/c4ra16439c] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The uncatalyzed synthesis of 3,5-disubstituted 1H- and 1-aryl-1H-pyrazoles derived from 1,3-diyne indoles was successfully carried out in PEG 400. The scope and limitations of the reaction were studied.
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Affiliation(s)
- Mariana M. Bassaco
- Departamento de Química
- Universidade Federal de Santa Maria
- Santa Maria
- Brazil
| | - Margiani P. Fortes
- Departamento de Química
- Universidade Federal de Santa Maria
- Santa Maria
- Brazil
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