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Ghosh S, Chakrabortty R, Ganesh V. Dual Functionalization of Alkynes Utilizing the Redox Characteristics of Transition Metal Catalysts. ChemCatChem 2021. [DOI: 10.1002/cctc.202100838] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Sudipta Ghosh
- Department of Chemistry Indian Institute of Technology Kharagpur 721302 West Bengal India
| | - Rajesh Chakrabortty
- Department of Chemistry Indian Institute of Technology Kharagpur 721302 West Bengal India
| | - Venkataraman Ganesh
- Department of Chemistry Indian Institute of Technology Kharagpur 721302 West Bengal India
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2
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Nasibipour M, Safaei E, Moaddeli A, Masoumpour MS, Wojtczak A. Biradical o-iminobenzosemiquinonato(1-) complexes of nickel(ii): catalytic activity in three-component coupling of aldehydes, amines and alkynes. RSC Adv 2021; 11:12845-12859. [PMID: 35423810 PMCID: PMC8697240 DOI: 10.1039/d0ra10248b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Accepted: 03/22/2021] [Indexed: 11/21/2022] Open
Abstract
The six-coordinated bis-o-iminosemiquinone complex, NiL2 BIS, in which LBIS is the o-iminosemiquinone 1-electron oxidized form of the tridentate o-aminophenol benzoxazole-based ligand H2LBAP, was synthesized and characterized. The crystal structure of the complex reveals octahedral geometry with a NiN4O2 coordination sphere in which Ni(ii) has been surrounded by two tridentate LBIS ligands. This compound exhibits (S Ni = 1) with both spin and orbital contribution to the magnetic moment and antiferromagnetic coupling between two electrons on two LBIS ligands which results in a triplet spin ground state (S = 1). The electronic transitions and the electrochemical behavior of this open-shell molecule are presented here, based on experimental observations and theoretical calculations. The electrochemical behavior of NiL2 BIS was investigated by cyclic voltammetry and indicates ligand-centered redox processes. Three-component coupling of aldehydes, amines and alkynes (A3-coupling) was studied in the presence of the NiL2 BIS complex, and the previously reported four-coordinated bis-o-iminosemiquinone NiL2 NIS. Furthermore, among these two o-iminobenzosemiquinonato(1-) complexes of Ni(ii) (NiL2 NIS and NiL2 BIS), NiL2 NIS was found to be an efficient catalyst in A3-coupling at 85 °C under solvent-free conditions and can be recovered and reused for several cycles with a small decrease in activity.
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Affiliation(s)
- Mina Nasibipour
- Department of Chemistry, College of Sciences, Shiraz University 71454 Shiraz Iran
| | - Elham Safaei
- Department of Chemistry, College of Sciences, Shiraz University 71454 Shiraz Iran
| | - Ali Moaddeli
- Department of Chemistry, College of Sciences, Shiraz University 71454 Shiraz Iran
| | | | - Andrzej Wojtczak
- Nicolaus Copernicus University, Faculty of Chemistry 87-100 Torun Poland
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3
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Nasibipour M, Safaei E, Masoumpour MS, Wojtczak A. Ancillary ligand electro-activity effects towards phenyl acetylene homocoupling reaction by a nickel(ii) complex of a non-innocent O-amino phenol ligand: a mechanistic insight. RSC Adv 2020; 10:24176-24189. [PMID: 35516191 PMCID: PMC9055111 DOI: 10.1039/d0ra04362a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 05/27/2020] [Indexed: 11/21/2022] Open
Abstract
A new Ni(ii) complex, was synthesized from the reaction of a non-innocent o-aminophenol ligand, and Ni(OAc)2. The crystal structure of NiIIL2 NIS (in which, IS stands for iminosemiquinone radical ligand with cyanide (shown by N in NIS) substituent on phenolate rings) exhibits the square planar environment of Ni(ii). The complex has been crystalized in the monoclinic system and Ni(ii) was surrounded by two oxygen and two nitrogen atoms of two ligands. Variable-temperature magnetic susceptibility measurement for crystalline samples of complex shows the effective magnetic moment per molecule (μ eff) of near zero and the diamagnetic nature of the complex (S = 0) which emphasize that strong antiferromagnetic coupling prevailed between the two unpaired electrons of LNIS ligands and Ni(ii) high spin electrons. The complex is EPR silent which confirms the diamagnetic character of the Ni(ii) complex. Electrochemical measurement (CV) indicates the redox-active character of ligand and metal. NiIIL2 NIS complex proved to be effective for free metal- or base counterpart homocoupling of phenyl acetylene at room temperature. To the best of our knowledge, this is the first example of using Ni(ii) complex without using any reducing agent due to the promotion ancillary effect of non-innocent o-aminophenol ligand which acts as an "electron reservoir" and can reversibly accept and donate electrons in the catalytic cycle. The theoretical calculation confirms the magnetostructure, electronic spectrum and confirmed the suggested mechanism of phenyl acetylene homocoupling with emphasis on the role of non-innocent ligand electro-activity and the effect of ligand substituent on the efficiency and stability of the complex.
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Affiliation(s)
- Mina Nasibipour
- Department of Chemistry, College of Sciences, Shiraz University 71454 Shiraz Iran
| | - Elham Safaei
- Department of Chemistry, College of Sciences, Shiraz University 71454 Shiraz Iran
| | | | - Andrzej Wojtczak
- Nicolaus Copernicus University, Faculty of Chemistry 87-100 Torun Poland
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4
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Abstract
We summarize the progress of the nickel-catalyzed alkyne difunctionalization reaction for the synthesis of tri- and tetrasubstituted olefins, with an emphasis on the strategy and control of stereochemistry.
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Affiliation(s)
- Wenfeng Liu
- The Center for Precision Synthesis (CPS)
- Institute for Advanced Studies (IAS)
- Wuhan University
- Wuhan
- P. R. China
| | - Wangqing Kong
- The Center for Precision Synthesis (CPS)
- Institute for Advanced Studies (IAS)
- Wuhan University
- Wuhan
- P. R. China
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5
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Rodrigo SK, Guan H. Mechanistic Study of Nickel-Catalyzed Reductive Coupling of Ynoates and Aldehydes. J Org Chem 2017; 82:5230-5235. [PMID: 28460172 DOI: 10.1021/acs.joc.7b00483] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
In this work, (1,5-hexadiene)Ni(SIPr) (SIPr = 1,3-bis(2,6-diisopropylphenyl)imidazolidin-2-ylidene) is used in place of Ni(COD)2/SIPr·HBF4/KOtBu (COD = 1,5-cyclooctadiene) as a more robust catalyst for regioselective reductive coupling of ynoates and aldehydes with triethylsilane. The catalytic reaction of ethyl 3-(trimethylsilyl)propiolate and methyl 4-formylbenzoate shows first-order dependence on aldehyde and catalyst concentrations, inverse first-order dependence on [ynoate], and no dependence on [silane]. The kinetics data, coupled with deuterium-labeling experiments, support a mechanism involving dissociation of the ynoate from a catalytically dormant nickelacyclopentadiene intermediate prior to turnover-limiting formation of a catalytically active nickeladihydrofuran.
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Affiliation(s)
- Sanjeewa K Rodrigo
- Department of Chemistry, University of Cincinnati , Cincinnati, Ohio 45221-0172, United States
| | - Hairong Guan
- Department of Chemistry, University of Cincinnati , Cincinnati, Ohio 45221-0172, United States
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6
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Modi A, Ali W, Patel BK. Organocatalytic Regioselective Concomitant Thiocyanation and Acylation of Oxiranes Using Aroyl Isothiocyanates. Org Lett 2017; 19:432-435. [DOI: 10.1021/acs.orglett.6b03430] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Anju Modi
- Department of Chemistry, Indian Institute of Technology Guwahati, North Guwahati 781039, India
| | - Wajid Ali
- Department of Chemistry, Indian Institute of Technology Guwahati, North Guwahati 781039, India
| | - Bhisma K. Patel
- Department of Chemistry, Indian Institute of Technology Guwahati, North Guwahati 781039, India
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7
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Prina Cerai G, Morandi B. Atom-economical cobalt-catalysed regioselective coupling of epoxides and aziridines with alkenes. Chem Commun (Camb) 2016; 52:9769-72. [DOI: 10.1039/c6cc04410g] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
An atom-economical cobalt-catalysed regioselective coupling of epoxides and aziridines with alkenes is reported.
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Affiliation(s)
| | - Bill Morandi
- Max-Planck-Institut für Kohlenforschung
- Mülheim an der Ruhr
- Germany
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8
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Willumstad TP, Boudreau PD, Danheiser RL. Synthesis of Highly Substituted Quinolines via a Tandem Ynamide Benzannulation/Iodocyclization Strategy. J Org Chem 2015; 80:11794-805. [PMID: 26259034 DOI: 10.1021/acs.joc.5b01648] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A two-stage "tandem strategy" for the regiocontrolled synthesis of very highly substituted quinolines is described. Benzannulation based on the reaction of cyclobutenones or diazo ketones with N-propargyl-substituted ynamides proceeds via a cascade of several pericyclic reactions to generate multiply substituted aniline derivatives. In the second stage of the tandem strategy, triflate derivatives of the phenolic benzannulation products undergo Larock cyclization upon exposure to iodine to form products that are further elaborated by methods such as palladium-catalyzed coupling to generate quinolines that can be substituted at every position of the bicyclic system.
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Affiliation(s)
- Thomas P Willumstad
- Department of Chemistry Massachusetts Institute of Technology Cambridge, Massachusetts 02139, United States
| | - Paul D Boudreau
- Department of Chemistry Massachusetts Institute of Technology Cambridge, Massachusetts 02139, United States
| | - Rick L Danheiser
- Department of Chemistry Massachusetts Institute of Technology Cambridge, Massachusetts 02139, United States
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9
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Hase S, Kayaki Y, Ikariya T. Mechanistic Aspects of the Carboxylative Cyclization of Propargylamines and Carbon Dioxide Catalyzed by Gold(I) Complexes Bearing an N-Heterocyclic Carbene Ligand. ACS Catal 2015. [DOI: 10.1021/acscatal.5b01335] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shun Hase
- Department of Applied Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, O-okayama 2-12-1-E4-1, Meguro-ku, Tokyo152-8552, Japan
| | - Yoshihito Kayaki
- Department of Applied Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, O-okayama 2-12-1-E4-1, Meguro-ku, Tokyo152-8552, Japan
| | - Takao Ikariya
- Department of Applied Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, O-okayama 2-12-1-E4-1, Meguro-ku, Tokyo152-8552, Japan
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10
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Huang CYD, Doyle AG. The chemistry of transition metals with three-membered ring heterocycles. Chem Rev 2014; 114:8153-98. [PMID: 24869559 DOI: 10.1021/cr500036t] [Citation(s) in RCA: 404] [Impact Index Per Article: 36.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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11
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Mannathan S, Cheng CH. Nickel-catalyzed regio- and diastereoselective intermolecular three-component coupling of oxabicyclic alkenes with alkynes and organoboronic acids. Chem Commun (Camb) 2013; 49:1557-9. [PMID: 23325053 DOI: 10.1039/c2cc38001c] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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12
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Rodrigo SK, Guan H. Quick Installation of a 1,4-Difunctionality via Regioselective Nickel-Catalyzed Reductive Coupling of Ynoates and Aldehydes. J Org Chem 2012; 77:8303-9. [DOI: 10.1021/jo301790q] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Sanjeewa K. Rodrigo
- Department of Chemistry, University of Cincinnati, P.O. Box 21072, Cincinnati, Ohio 45221-0172,
United States
| | - Hairong Guan
- Department of Chemistry, University of Cincinnati, P.O. Box 21072, Cincinnati, Ohio 45221-0172,
United States
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13
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Theoretical studies of regioselectivity of Ni- and Rh-catalyzed C–C bond forming reactions with unsymmetrical alkynes. Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2010.12.042] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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14
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Bower JF, Krische MJ. Formation of C-C Bonds via Iridium-Catalyzed Hydrogenation and Transfer Hydrogenation. TOP ORGANOMETAL CHEM 2011; 34:107-138. [PMID: 21822399 PMCID: PMC3149833 DOI: 10.1007/978-3-642-15334-1_5] [Citation(s) in RCA: 108] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The formation of C-C bonds via catalytic hydrogenation and transfer hydrogenation enables carbonyl and imine addition in the absence of stoichiometric organometallic reagents. In this review, iridium-catalyzed C-C bond-forming hydrogenations and transfer hydrogenations are surveyed. These processes encompass selective, atom-economic methods for the vinylation and allylation of carbonyl compounds and imines. Notably, under transfer hydrogenation conditions, alcohol dehydrogenation drives reductive generation of organoiridium nucleophiles, enabling carbonyl addition from the aldehyde or alcohol oxidation level. In the latter case, hydrogen exchange between alcohols and π-unsaturated reactants generates electrophile-nucleophile pairs en route to products of hydro-hydroxyalkylation, representing a direct method for the functionalization of carbinol C-H bonds.
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Affiliation(s)
- John F Bower
- Department of Chemistry and Biochemistry, University of Texas at Austin, 1 University Station - A5300, Austin, TX 78712-0165, USA and Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford 1 3TA, UK
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15
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Ohashi M, Saijo H, Arai T, Ogoshi S. Nickel(0)-Catalyzed Formation of Oxaaluminacyclopentenes via an Oxanickelacyclopentene Key Intermediate: Me2AlOTf-Assisted Oxidative Cyclization of an Aldehyde and an Alkyne with Nickel(0). Organometallics 2010. [DOI: 10.1021/om100857a] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Masato Ohashi
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
- Center for Atomic and Molecular Technologies, Osaka University, Suita, Osaka 565-0871, Japan
| | - Hiroki Saijo
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Tomoya Arai
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Sensuke Ogoshi
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
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16
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Yang CM, Jeganmohan M, Parthasarathy K, Cheng CH. Highly Selective Nickel-Catalyzed Three-Component Coupling of Alkynes with Enones and Alkenyl Boronic Acids: A Novel Route to Substituted 1,3-Dienes. Org Lett 2010; 12:3610-3. [DOI: 10.1021/ol101319f] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chun-Ming Yang
- Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan
| | | | | | - Chien-Hong Cheng
- Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan
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17
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Liu P, McCarren P, Cheong PHY, Jamison TF, Houk KN. Origins of regioselectivity and alkene-directing effects in nickel-catalyzed reductive couplings of alkynes and aldehydes. J Am Chem Soc 2010; 132:2050-7. [PMID: 20095609 PMCID: PMC2830786 DOI: 10.1021/ja909562y] [Citation(s) in RCA: 105] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The origins of reactivity and regioselectivity in nickel-catalyzed reductive coupling reactions of alkynes and aldehydes were investigated with density functional calculations. The regioselectivities of reactions of simple alkynes are controlled by steric effects, while conjugated enynes and diynes are predicted to have increased reactivity and very high regioselectivities, placing alkenyl or alkynyl groups distal to the forming C-C bond. The reactions of enynes and diynes involve 1,4-attack of the Ni-carbonyl complex on the conjugated enyne or diyne. The consequences of these conclusions on reaction design are discussed.
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Affiliation(s)
- Peng Liu
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095
| | - Patrick McCarren
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095
| | - Paul Ha-Yeon Cheong
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095
| | - Timothy F. Jamison
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| | - K. N. Houk
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095
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McCarren PR, Liu P, Cheong PHY, Jamison TF, Houk KN. Mechanism and transition-state structures for nickel-catalyzed reductive alkyne-aldehyde coupling reactions. J Am Chem Soc 2009; 131:6654-5. [PMID: 19397371 PMCID: PMC2824658 DOI: 10.1021/ja900701g] [Citation(s) in RCA: 84] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The mechanism of nickel-catalyzed reductive alkyne-aldehyde coupling reactions has been investigated using density functional theory. The preferred mechanism involves oxidative cyclization to form the nickeladihydrofuran intermediate followed by transmetalation and reductive elimination. The rate- and selectivity-determining oxidative cyclization transition state is analyzed in detail. The d --> pi*(perpendicular) back-donation stabilizes the transition state and leads to higher reactivity for alkynes than alkenes. Strong Lewis acids accelerate the couplings with both alkynes and alkenes by coordinating with the aldehyde oxygen in the transition state.
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Affiliation(s)
- P. R. McCarren
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095
| | - Peng Liu
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095
| | - Paul Ha-Yeon Cheong
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095
| | - Timothy F. Jamison
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| | - K. N. Houk
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095
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19
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Sparling BA, Simpson GL, Jamison TF. Strategic use of nickel(0)-catalyzed enyne-epoxide reductive coupling towards the synthesis of (-)-cyatha-3,12-diene. Tetrahedron 2009; 65:3270-3280. [PMID: 20161213 PMCID: PMC2716032 DOI: 10.1016/j.tet.2008.11.086] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Various situations are explored in which the nickel(0)-catalyzed enyne-epoxide reductive coupling was utilized to access key intermediates towards the total synthesis of (-)-cyatha-3,12-diene (1). Enantioenriched 3,5-dien-1-ols with a variety of functionality were obtained in a straightforward manner from easily accessible 1,3-enynes and terminal epoxides.
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Affiliation(s)
- Brian A. Sparling
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
| | - Graham L. Simpson
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
| | - Timothy F. Jamison
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
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20
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Mannathan S, Jeganmohan M, Cheng CH. Nickel-Catalyzed Borylative Coupling of Alkynes, Enones, and Bis(pinacolato)diboron as a Route to Substituted Alkenyl Boronates. Angew Chem Int Ed Engl 2009; 48:2192-5. [DOI: 10.1002/anie.200805293] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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21
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Mannathan S, Jeganmohan M, Cheng CH. Nickel-Catalyzed Borylative Coupling of Alkynes, Enones, and Bis(pinacolato)diboron as a Route to Substituted Alkenyl Boronates. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200805293] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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22
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23
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Jeganmohan M, Cheng CH. Cobalt- and Nickel-Catalyzed Regio- and Stereoselective Reductive Coupling of Alkynes, Allenes, and Alkenes with Alkenes. Chemistry 2008; 14:10876-86. [DOI: 10.1002/chem.200800904] [Citation(s) in RCA: 140] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Tekavec TN, Louie J. Nickel-catalyzed cycloadditions of unsaturated hydrocarbons, aldehydes, and ketones. J Org Chem 2008; 73:2641-8. [PMID: 18318544 DOI: 10.1021/jo702508w] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The nickel-catalyzed cycloaddition of unsaturated hydrocarbons and carbonyls is reported. Diynes and enynes were used as coupling partners. Carbonyl substrates include both aldehdyes and ketones. Reactions of diynes and aldehydes afforded the [3,3] electrocyclic ring-opened tautomers, rather than pyrans, in high yields. The cycloaddition reaction of enynes and aldehydes afforded two distinct products. A new carbon-carbon bond is formed, prior to a competitive beta-hydrogen elimination of a nickel alkoxide, between the carbonyl carbon and either one of the carbons of the olefin or the alkyne. The steric hindrance of the enyne greatly affected the chemoselectivity of the cycloaddition of enynes and aldehydes. In some cases, dihydropyran was also formed. The scope of the cycloaddition reaction was expanded to include the coupling of enynes and ketones. No beta-hydrogen elimination was observed in cycloaddition reaction of enynes and ketones. Instead, C-O bond-forming reductive elimination occurred exclusively to afford dihydropyrans in excellent yields. In all cases, complete chemoselectivity was observed; only dihydropyrans where the carbonyl carbon forms a carbon-carbon bond with a carbon of the olefin, rather than of the alkyne, were observed. All cycloaddition reactions occur at room temperature and employ nickel catalysts bearing the hindered 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene (IPr) or its saturated analogue, 1,3-bis(2,6-diisopropylphenyl)-4,5-dihydroimidazolin-2-ylidene (SIPr).
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Affiliation(s)
- Thomas N Tekavec
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, UT 84112-0850, USA
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25
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Shibahara F, Krische MJ. Formation of C-C Bonds via Ruthenium Catalyzed Transfer Hydrogenation: Carbonyl Addition from the Alcohol or Aldehyde Oxidation Level. CHEM LETT 2008; 37:1102-1107. [PMID: 21927534 PMCID: PMC3172969 DOI: 10.1246/cl.2008.1102] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Under the conditions of ruthenium catalyzed transfer hydrogenation employing isopropanol as terminal reductant, π-unsaturated compounds (1,3-dienes, allenes, 1,3-enynes and alkynes) reductively couple to aldehydes to furnish products of carbonyl addition. In the absence of isopropanol, π-unsaturated compounds couple directly from the alcohol oxidation level to form identical products of carbonyl addition. Such "alcohol-unsaturate C-C couplings" enable carbonyl allylation, propargylation and vinylation from the alcohol oxidation level in the absence of stoichiometric organometallic reagents or metallic reductants. Thus, direct catalytic C-H functionalization of alcohols at the carbinol carbon is achieved.
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Affiliation(s)
- Fumitoshi Shibahara
- Department of Chemistry and Biochemistry, University of Texas at Austin, Austin, TX 78712-1167, U.S.A
| | - Michael J. Krische
- Department of Chemistry and Biochemistry, University of Texas at Austin, Austin, TX 78712-1167, U.S.A
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Moslin RM, Miller-Moslin K, Jamison TF. Regioselectivity and enantioselectivity in nickel-catalysed reductive coupling reactions of alkynes. Chem Commun (Camb) 2007:4441-9. [PMID: 17971951 PMCID: PMC3130994 DOI: 10.1039/b707737h] [Citation(s) in RCA: 181] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nickel-catalysed reductive coupling reactions of alkynes have emerged as powerful synthetic tools for the selective preparation of functionalized alkenes. One of the greatest challenges associated with these transformations is control of regioselectivity. Recent work from our laboratory has provided an improved understanding of several of the factors governing regioselectivity in these reactions, and related studies have revealed that the reaction mechanism can differ substantially depending on the ligand employed. A discussion of stereoselective transformations and novel applications of nickel catalysis in coupling reactions of alkynes is also included.
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Affiliation(s)
- Ryan M Moslin
- Massachusetts Institute of Technology, Department of Chemistry, Cambridge, MA, USA.
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Nevárez Z, Woerpel KA. Metal-Catalyzed Silylene Transfer to Imines: Synthesis and Reactivity of Silaaziridines. Org Lett 2007; 9:3773-6. [PMID: 17713917 DOI: 10.1021/ol701424a] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Metal-catalyzed silylene transfer to imines provides an efficient synthesis of silaaziridines. These strained cyclic silanes undergo selective bond-forming reactions, permitting the synthesis of nitrogen-containing compounds after protodesilylation of the resulting vinyl silane.
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Affiliation(s)
- Zulimar Nevárez
- Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025, USA
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28
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Jayanth TT, Cheng CH. Nickel-Catalyzed Coupling of Arynes, Alkenes, and Boronic Acids: Dual Role of the Boronic Acid. Angew Chem Int Ed Engl 2007; 46:5921-4. [PMID: 17582805 DOI: 10.1002/anie.200701063] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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29
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Jayanth T, Cheng CH. Nickel-Catalyzed Coupling of Arynes, Alkenes, and Boronic Acids: Dual Role of the Boronic Acid. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200701063] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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30
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31
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Ikeda SI, Suzuki K, Odashima K. Nickel-catalyzed coupling of allyl chlorides and enynes. Chem Commun (Camb) 2007:457-9. [PMID: 16493836 DOI: 10.1039/b515508h] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Ni-catalyzed coupling of allyl chlorides and enynes has been developed; the cyclization of enynes was triggered by the addition of pi-allylnickel species to the alkyne part, followed by the incorporation of the alkene part.
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Affiliation(s)
- Shin-ichi Ikeda
- Graduate School of Pharmaceutical Sciences, Nagoya City University, Tanabe-dori, Nagoya, 467-8603, Japan
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32
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Shimizu M, Kimura M, Tamaru Y. Use of Allyl, 2-Tetrahydrofuryl, and 2-Tetrahydropyranyl Ethers as Useful C3-, C4-, and C5-Carbon Sources: Palladium-Catalyzed Allylation of Aldehydes. Chemistry 2005; 11:6629-42. [PMID: 16130159 DOI: 10.1002/chem.200500450] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Palladium-diethylzinc or palladium-triethylborane catalytically promotes self-allylation of 2-(allyloxy)tetrahydrofurans, 2-(allyloxy)tetrahydropyrans, and their hydroxy derivatives on the rings (ribose, glucose, mannose, deoxyribose, deoxyglucose). All the reactions proceed at room temperature and provide polyhydroxyl products, sharing a structural motif of a homoallyl alcohol, in good to excellent yields with high levels of stereoselectivity. Useful C3-unit elongation, which makes the best use of an allyl ether as a protecting group and a nucleophilic allylation agent, is demonstrated. Mechanisms for the umpolung reaction (of an allyl ether into an allylic anion) and stereoselectivity associated with allylation of aldehydes are discussed.
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Affiliation(s)
- Masamichi Shimizu
- Graduate School of Science and Technology, Nagasaki University, 1-14 Bunkyo, Nagasaki 852-8521, Japan
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34
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Molinaro C, Jamison TF. Catalytic reductive coupling of epoxides and aldehydes: epoxide-ring opening precedes carbonyl reduction. Angew Chem Int Ed Engl 2005; 44:129-32. [PMID: 15599916 DOI: 10.1002/anie.200461705] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Carmela Molinaro
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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36
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Molinaro C, Jamison TF. Catalytic Reductive Coupling of Epoxides and Aldehydes: Epoxide-Ring Opening Precedes Carbonyl Reduction. Angew Chem Int Ed Engl 2005. [DOI: 10.1002/ange.200461705] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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37
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Ikeda SI, Sanuki R, Miyachi H, Miyashita H, Taniguchi M, Odashima K. Ni-Catalyzed, ZnCl2-Assisted Domino Coupling of Enones, Alkynes, and Alkenes. J Am Chem Soc 2004; 126:10331-8. [PMID: 15315447 DOI: 10.1021/ja047580a] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A Ni(0)/ZnCl(2) system effectively promotes the coupling of enones and alkene-tethered alkynes. In the reaction with 1,6-enynes, the oxidative cyclization of Ni(0) species on enones across the alkyne part followed by ZnCl(2)-promoted cleavage generates alkenylnickel intermediates. Subsequent migratory insertion of the tethered alkene occurs with 5-exo-cyclization. When the resulting sigma-alkylnickel intermediates have beta-hydrogen atoms, the reaction terminates by beta-hydrogen elimination to provide cyclopentane derivatives. On the other hand, a sigma-alkylnickel intermediate that does not have beta-hydrogen atoms undergoes the insertion of a second alkene unit to cause a domino effect via a three-fold C-C bond formation process with and without the cleavage of one C-C bond.
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Affiliation(s)
- Shin-ichi Ikeda
- Contribution from the Graduate School of Pharmaceutical Sciences, Nagoya City University, Tanabe-dori, Mizuho-ku, Nagoya 467-8603, Japan
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