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Pradhan TR, Kyoon Park J. Chemoselective Coupling of π-Systems to Access Metallated 1,4- or 1,5-Skipped Dienes in Multicomponent Reactions. Chemistry 2022; 28:e202202120. [PMID: 36094297 DOI: 10.1002/chem.202202120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Indexed: 12/14/2022]
Abstract
Integrating distinct unsaturated C-C systems while simultaneously installing metallic groups has been significantly challenging to execute in a multicomponent reaction. Therefore, designing a suitable mechanistic pathway that provides the required reactivity and selectivity for target C-C bonds with metallic reagents to ensure successful coupling is the key to success. Copper-catalyzed borylallylation and silylallylation have emerged as the most efficient strategies for assembling borylated/silylated skipped (1,4 or 1,5) dienes by catalytically combining an organocopper intermediate with allyl electrophiles. However, reactions involving interelemental reagents (e. g., [Si]-[B]) to accomplish intermolecular atom-economic couplings have not been studied thoroughly. Therefore, to aid the development of new transformations in this research area, this article attempts to include all precedents, including recent studies by the authors. The present Concept article may be helpful for researchers working in this area as it provides a basic conceptual framework.
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Affiliation(s)
- Tapas R Pradhan
- Department of Chemistry, Chemistry Institute for Functional Materials, Pusan National University, 46241, Busan, Korea
| | - Jin Kyoon Park
- Department of Chemistry, Chemistry Institute for Functional Materials, Pusan National University, 46241, Busan, Korea
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2
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Chaves‐Pouso A, Álvarez‐Constantino AM, Fañanás‐Mastral M. Enantio‐ and Diastereoselective Copper‐Catalyzed Allylboration of Alkynes with Allylic
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‐Dichlorides. Angew Chem Int Ed Engl 2022; 61:e202117696. [PMID: 35263483 PMCID: PMC9314970 DOI: 10.1002/anie.202117696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Indexed: 11/06/2022]
Affiliation(s)
- Andrea Chaves‐Pouso
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) Departamento de Química Orgánica Universidade de Santiago de Compostela 15782 Santiago de Compostela Spain
| | - Andrés M. Álvarez‐Constantino
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) Departamento de Química Orgánica Universidade de Santiago de Compostela 15782 Santiago de Compostela Spain
| | - Martín Fañanás‐Mastral
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) Departamento de Química Orgánica Universidade de Santiago de Compostela 15782 Santiago de Compostela Spain
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3
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Chaves‐Pouso A, Álvarez‐Constantino AM, Fañanás‐Mastral M. Enantio‐ and Diastereoselective Copper‐Catalyzed Allylboration of Alkynes with Allylic
gem
‐Dichlorides. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202117696] [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)
- Andrea Chaves‐Pouso
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) Departamento de Química Orgánica Universidade de Santiago de Compostela 15782 Santiago de Compostela Spain
| | - Andrés M. Álvarez‐Constantino
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) Departamento de Química Orgánica Universidade de Santiago de Compostela 15782 Santiago de Compostela Spain
| | - Martín Fañanás‐Mastral
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) Departamento de Química Orgánica Universidade de Santiago de Compostela 15782 Santiago de Compostela Spain
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4
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Trost BM, Zhang G, Xu M, Qi X. ProPhenol Derived Ligands to Simultaneously Coordinate a Main-Group Metal and a Transition Metal: Application to a Zn-Cu Catalyzed Reaction. Chemistry 2021; 28:e202104268. [PMID: 34902190 DOI: 10.1002/chem.202104268] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Indexed: 11/05/2022]
Abstract
A new bifunctional ligand bearing chiral N-heterocyclic carbene (NHC) and prolinol moieties is presented. Utilizing the designed ligand, an in situ formed Cu/Zn hetero-bimetallic complex unlocks the asymmetric allylic alkylation reactions of allyl phosphates with zinc keto-homoenolates, leading to the formation of various γ-vinyl ketones with good regio- and enantio-selectivity. DF sT calculation supports that the chelation of allyl phosphates with catalyst promotes the SN 2' addition and the ligand-substrate steric interactions account for the stereoselective outcome.
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Affiliation(s)
- Barry M Trost
- Department of Chemistry, Stanford University, Stanford, California, 94035-5080, United States
| | - Guoting Zhang
- Department of Chemistry, Stanford University, Stanford, California, 94035-5080, United States
| | - Minghao Xu
- Department College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
| | - Xiaotian Qi
- Department College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
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5
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Doyle MGJ, Gabbey AL, McNutt W, Lundgren RJ. Enantioselective Tertiary Electrophile (Hetero)Benzylation: Pd‐Catalyzed Substitution of Isoprene Monoxide with Arylacetates**. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202110525] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Michael G. J. Doyle
- Department of Chemistry University of Alberta Edmonton Alberta T6G 2G2 Canada
| | - Alexis L. Gabbey
- Department of Chemistry University of Alberta Edmonton Alberta T6G 2G2 Canada
| | - Wesley McNutt
- Department of Chemistry University of Alberta Edmonton Alberta T6G 2G2 Canada
| | - Rylan J. Lundgren
- Department of Chemistry University of Alberta Edmonton Alberta T6G 2G2 Canada
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Doyle MGJ, Gabbey AL, McNutt W, Lundgren RJ. Enantioselective Tertiary Electrophile (Hetero)Benzylation: Pd-Catalyzed Substitution of Isoprene Monoxide with Arylacetates*. Angew Chem Int Ed Engl 2021; 60:26495-26499. [PMID: 34658132 DOI: 10.1002/anie.202110525] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 09/12/2021] [Indexed: 12/15/2022]
Abstract
The enantioselective generation of quaternary carbon centers remains challenging but is of growing importance for the preparation of functional molecules. Metal catalyzed allylic alkylations of tertiary electrophiles can provide access to these substructures but remain generally incompatible with organometallic benzyl nucleophiles. Here we demonstrate that electron-deficient arylacetates can serve as benzyl nucleophile surrogates to generate enantioenriched acyclic molecules containing a quaternary carbon center via a two-step substitution-decarboxylation process using isoprene monoxide. Products are often obtained in >90 % ee using a commercially available catalyst. An array of electron-withdrawing functional groups on the arylacetate moiety are tolerated. The lactone generated by the initial substitution reaction can be used in further stereoselective transformations to prepare molecules with acyclic vicinal quaternary stereocenters.
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Affiliation(s)
- Michael G J Doyle
- Department of Chemistry, University of Alberta, Edmonton, Alberta, T6G 2G2, Canada
| | - Alexis L Gabbey
- Department of Chemistry, University of Alberta, Edmonton, Alberta, T6G 2G2, Canada
| | - Wesley McNutt
- Department of Chemistry, University of Alberta, Edmonton, Alberta, T6G 2G2, Canada
| | - Rylan J Lundgren
- Department of Chemistry, University of Alberta, Edmonton, Alberta, T6G 2G2, Canada
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7
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Manavi B, Tejeneki HZ, Rominger F, Armaghan M, Frank W, Bijanzadeh HR, Balalaie S. Copper(I)‐Catalyzed Intramolecular Cyclization of
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‐Propargyloxy Diketopiperazines to Access Diverse Diazabicyclic and Spiro‐Diketopiperazinochromanes. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Bita Manavi
- Peptide Chemistry Research Institute K. N. Toosi University of Technology P. O. Box 15875-4416 Tehran Iran
| | - Hossein Zahedian Tejeneki
- Peptide Chemistry Research Institute K. N. Toosi University of Technology P. O. Box 15875-4416 Tehran Iran
| | - Frank Rominger
- Organisch-Chemisches Institut der Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Mahsa Armaghan
- Institut für Anorganische Chemie und Strukturchemie Heinrich-Heine-Universität Düsseldorf Universitätsstraße 1 40225 Düsseldorf Germany
| | - Walter Frank
- Institut für Anorganische Chemie und Strukturchemie Heinrich-Heine-Universität Düsseldorf Universitätsstraße 1 40225 Düsseldorf Germany
| | - Hamid Reza Bijanzadeh
- Department of Environmental Sciences, Faculty of Natural Resources and Marine Sciences Tarbiat Modares University Tehran Iran
| | - Saeed Balalaie
- Peptide Chemistry Research Institute K. N. Toosi University of Technology P. O. Box 15875-4416 Tehran Iran
- Medical Biology Research Center Kermanshah University of Medical Sciences Kermanshah Iran
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Zapf L, Radius U, Finze M. 1,3-Bis(tricyanoborane)imidazoline-2-ylidenate Anion-A Ditopic Dianionic N-Heterocyclic Carbene Ligand. Angew Chem Int Ed Engl 2021; 60:17974-17980. [PMID: 33961330 PMCID: PMC8453866 DOI: 10.1002/anie.202105529] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Indexed: 01/14/2023]
Abstract
The 1,3-bis(tricyanoborane)imidazolate anion 1 was obtained in high yield from lithium imidazolate and B(CN)3 -pyridine adduct. Anion 1 is chemically very robust and thus allowed the isolation of the corresponding H5 O2 + salt. Furthermore, monoanion 1 served as starting species for the novel dianionic N-heterocyclic carbene (NHC), 1,3-bis(tricyanoborane)imidazoline-2-ylidenate anion 3 that acts as ditopic ligand via the carbene center and the cyano groups at boron. First reactions of this new NHC 3 with methyl iodide, elemental selenium, and [Ni(CO)4 ] led to the methylated imidazolate ion 4, the dianionic selenium adduct 5, and the dianionic nickel tricarbonyl complex 6. These NHC derivatives provide a first insight into the electronic and steric properties of the dianionic NHC 3. Especially the combination of properties, such as double negative charge, different coordination sites, large buried volume and good σ-donor and π-acceptor ability, make NHC 3 a unique and promising ligand and building block.
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Affiliation(s)
- Ludwig Zapf
- Institut für nachhaltige Chemie & Katalyse mit Bor (ICB)Institut für Anorganische ChemieJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Udo Radius
- Institut für nachhaltige Chemie & Katalyse mit Bor (ICB)Institut für Anorganische ChemieJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Maik Finze
- Institut für nachhaltige Chemie & Katalyse mit Bor (ICB)Institut für Anorganische ChemieJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
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Zapf L, Radius U, Finze M. Das 1,3‐Bis(tricyanoboran)imidazolin‐2‐ylidenat‐Anion – Ein ditopischer dianionischer N‐heterocyclischer Carben‐Ligand. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202105529] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Ludwig Zapf
- Institut für nachhaltige Chemie & Katalyse mit Bor (ICB) Institut für Anorganische Chemie Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
| | - Udo Radius
- Institut für nachhaltige Chemie & Katalyse mit Bor (ICB) Institut für Anorganische Chemie Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
| | - Maik Finze
- Institut für nachhaltige Chemie & Katalyse mit Bor (ICB) Institut für Anorganische Chemie Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
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Chen C, Liu FS, Szostak M. BIAN-NHC Ligands in Transition-Metal-Catalysis: A Perfect Union of Sterically Encumbered, Electronically Tunable N-Heterocyclic Carbenes? Chemistry 2021; 27:4478-4499. [PMID: 32989914 PMCID: PMC7940599 DOI: 10.1002/chem.202003923] [Citation(s) in RCA: 46] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 09/24/2020] [Indexed: 12/12/2022]
Abstract
The discovery of NHCs (NHC = N-heterocyclic carbenes) as ancillary ligands in transition-metal-catalysis ranks as one of the most important developments in synthesis and catalysis. It is now well-recognized that the strong σ-donating properties of NHCs along with the ease of scaffold modification and a steric shielding of the N-wingtip substituents around the metal center enable dramatic improvements in catalytic processes, including the discovery of reactions that are not possible using other ancillary ligands. In this context, although the classical NHCs based on imidazolylidene and imidazolinylidene ring systems are now well-established, recently tremendous progress has been made in the development and catalytic applications of BIAN-NHC (BIAN = bis(imino)acenaphthene) class of ligands. The enhanced reactivity of BIAN-NHCs is a direct result of the combination of electronic and steric properties that collectively allow for a major expansion of the scope of catalytic processes that can be accomplished using NHCs. BIAN-NHC ligands take advantage of (1) the stronger σ-donation, (2) lower lying LUMO orbitals, (3) the presence of an extended π-system, (4) the rigid backbone that pushes the N-wingtip substituents closer to the metal center by buttressing effect, thus resulting in a significantly improved control of the catalytic center and enhanced air-stability of BIAN-NHC-metal complexes at low oxidation state. Acenaphthoquinone as a precursor enables facile scaffold modification, including for the first time the high yielding synthesis of unsymmetrical NHCs with unique catalytic properties. Overall, this results in a highly attractive, easily accessible class of ligands that bring major advances and emerge as a leading practical alternative to classical NHCs in various aspects of catalysis, cross-coupling and C-H activation endeavors.
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Affiliation(s)
- Changpeng Chen
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, NJ, 07102, USA
| | - Feng-Shou Liu
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, NJ, 07102, USA
- School of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, Zhongshan, Guangdong, 528458, China
| | - Michal Szostak
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, NJ, 07102, USA
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