1
|
Kisszékelyi P, Mudráková B, Cigáň M, Šebesta R. Persistent guaiazulene arylmethylium ions as electrophilic traps for metal enolates. Chem Commun (Camb) 2024; 60:3339-3342. [PMID: 38440813 DOI: 10.1039/d4cc00208c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2024]
Abstract
Guaiazulene-stabilized cations reacted with metal enolates affording carbonyl compounds with an azulene moiety. Metal enolates generated by asymmetric conjugate addition of organometallic reagents led to enantioenriched products. Additionally, guaiazulene-substituted cations efficiently react with silyl enol ethers. DFT calculations allowed estimation of the electrophilicities of the carbocations. Reaction progress was monitored by a decrease in the reactant's Vis-light absorption and an increase in the product's anti-Kasha emission.
Collapse
Affiliation(s)
- Péter Kisszékelyi
- Comenius University Bratislava, Faculty of Natural Sciences, Department of Organic Chemistry, Mlynská dolina, Ilkovičova 6, Bratislava 842 15, Slovakia.
| | - Brigita Mudráková
- Comenius University Bratislava, Faculty of Natural Sciences, Department of Organic Chemistry, Mlynská dolina, Ilkovičova 6, Bratislava 842 15, Slovakia.
| | - Marek Cigáň
- Comenius University Bratislava, Faculty of Natural Sciences, Department of Organic Chemistry, Mlynská dolina, Ilkovičova 6, Bratislava 842 15, Slovakia.
| | - Radovan Šebesta
- Comenius University Bratislava, Faculty of Natural Sciences, Department of Organic Chemistry, Mlynská dolina, Ilkovičova 6, Bratislava 842 15, Slovakia.
| |
Collapse
|
2
|
Zhang Q, Zhang H, Geng S, Zhao X, Liu S, Hong K, Pan J, Yan X. Green transformation of CO 2 into γ-amino alcohols with continuous stereocenters. Chem Commun (Camb) 2024; 60:2062-2065. [PMID: 38288752 DOI: 10.1039/d3cc05193e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2024]
Abstract
Here, we present a synthetic route towards γ-amino alcohols with continuous stereocenters based on a copper-catalyzed asymmetric conjugate addition/CO2-trapping tandem reaction of α,β-unsaturated amide, followed by a reduction of the generated α-carboxyl amide. This strategy provides a green route for the transformation of CO2 into valuable chiral organic molecules.
Collapse
Affiliation(s)
- Qiuxin Zhang
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China.
| | - Heng Zhang
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China.
| | - Senbai Geng
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China.
| | - Xian Zhao
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China.
| | - Shucheng Liu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China.
| | - Kun Hong
- Jiangsu Provincial Key Laboratory of Palygorskite Science and Applied Technology, Faculty of Chemical Engineering, Huaiyin Institute of Technology, Huaian 223003, China.
| | - Jianming Pan
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China.
| | - Xingchen Yan
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China.
| |
Collapse
|
3
|
Mudráková B, Marcia de Figueiredo R, Campagne JM, Šebesta R. Asymmetric tandem conjugate addition and reaction with carbocations on acylimidazole Michael acceptors. Beilstein J Org Chem 2023; 19:881-888. [PMID: 37346500 PMCID: PMC10280057 DOI: 10.3762/bjoc.19.65] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 06/06/2023] [Indexed: 06/23/2023] Open
Abstract
We present here a stereoselective tandem reaction based on the asymmetric conjugate addition of dialkylzinc reagents to unsaturated acylimidazoles followed by trapping of the intermediate zinc enolate with carbocations. The use of a chiral NHC ligand provides chiral zinc enolates in high enantiomeric purities. These enolates are reacted with highly electrophilic onium compounds to afford densely substituted acylimidazoles. DFT calculations helped to understand the reactivity of the zinc enolates derived from acylimidazoles and allowed their comparison with metal enolates obtained by other conjugate addition reactions.
Collapse
Affiliation(s)
- Brigita Mudráková
- Comenius University Bratislava, Faculty of Natural Sciences, Department of Organic Chemistry, Mlynská dolina, Ilkovičova 6, 842 15 Bratislava, Slovakia
| | | | | | - Radovan Šebesta
- Comenius University Bratislava, Faculty of Natural Sciences, Department of Organic Chemistry, Mlynská dolina, Ilkovičova 6, 842 15 Bratislava, Slovakia
| |
Collapse
|
4
|
Kisszékelyi P, Šebesta R. Enolates ambushed - asymmetric tandem conjugate addition and subsequent enolate trapping with conventional and less traditional electrophiles. Beilstein J Org Chem 2023; 19:593-634. [PMID: 37180457 PMCID: PMC10167861 DOI: 10.3762/bjoc.19.44] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Accepted: 04/21/2023] [Indexed: 05/16/2023] Open
Abstract
Metal enolates are useful intermediates and building blocks indispensable in many organic synthetic transformations. Chiral metal enolates obtained by asymmetric conjugate additions of organometallic reagents are structurally complex intermediates that can be employed in many transformations. In this review, we describe this burgeoning field that is reaching maturity after more than 25 years of development. The effort of our group to broaden possibilities to engage metal enolates in reactions with new electrophiles is described. The material is divided according to the organometallic reagent employed in the conjugate addition step, and thus to the particular metal enolate formed. Short information on applications in total synthesis is also given.
Collapse
Affiliation(s)
- Péter Kisszékelyi
- Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University Bratislava, Mlynská dolina, Ilkovičova 6, 842 15 Bratislava, Slovakia
| | - Radovan Šebesta
- Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University Bratislava, Mlynská dolina, Ilkovičova 6, 842 15 Bratislava, Slovakia
| |
Collapse
|
5
|
Boldrini C, Reis MC, Harutyunyan SR. Electrophilic Trapping of Semibenzenes. J Org Chem 2022; 87:12772-12782. [PMID: 36095222 PMCID: PMC9552181 DOI: 10.1021/acs.joc.2c01331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
In this work, we
demonstrate how allylative dearomatization of
benzyl chlorides can provide direct access to a variety of semibenzenes.
These scaffolds behave as highly reactive nucleophiles in the presence
of carbocations. In addition, semibenzenes are susceptible to intramolecular
rearrangements rendering a broad scope of functionalized arenes. An
analysis of this new reactivity is reported, as well as the rationale
behind the observed intramolecular reorganizations.
Collapse
Affiliation(s)
- Cosimo Boldrini
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Marta Castiñeira Reis
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Syuzanna R Harutyunyan
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| |
Collapse
|
6
|
Abstract
The asymmetric hydroaminocarbonylation of olefins represents a straightforward approach for the synthesis of enantioenriched amides, but is hampered by the necessity to employ CO gas, often at elevated pressures. We herein describe, as an alternative, an enantioselective hydrocarbamoylation of alkenes leveraging dual copper hydride and palladium catalysis to enable the use of readily available carbamoyl chlorides as a practical carbamoylating reagent. The protocol is applicable to various types of olefins, including alkenyl arenes, terminal alkenes, and 1,1-disubstituted alkenes. Substrates containing a diverse range of functional groups as well as heterocyclic substructures undergo functionalization to provide α- and β-chiral amides in good yields and with excellent enantioselectivities.
Collapse
Affiliation(s)
- Sheng Feng
- Department of ChemistryMassachusetts Institute of TechnologyCambridgeMA 02139USA
| | - Yuyang Dong
- Department of ChemistryMassachusetts Institute of TechnologyCambridgeMA 02139USA
| | - Stephen L. Buchwald
- Department of ChemistryMassachusetts Institute of TechnologyCambridgeMA 02139USA
| |
Collapse
|
7
|
Feng S, Dong Y, Buchwald SL. Enantioselective Hydrocarbamoylation of Alkenes. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202206692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sheng Feng
- Massachusetts Institute of Technology Chemistry 235 Albany St1050 02139 Cambridge CHINA
| | - Yuyang Dong
- Massachusetts Institute of Technology Chemistry CHINA
| | - Stephen L. Buchwald
- Massachusetts Institute of Technology Department of Chemistry 77 Massachusetts AvenueRoom18-490 2139 Cambridge UNITED STATES
| |
Collapse
|
8
|
Mudráková B, Kisszékelyi P, Vargová D, Zakiewicz D, Šebesta R. Asymmetric Tandem Conjugate Addition and Reaction with Carbocations on Unsaturated Heterocycles. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202101485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Brigita Mudráková
- Comenius University in Bratislava Faculty of Natural Sciences Department of Organic Chemistry, Mlynská dolina Ilkovičova 6 842 15 Bratislava Slovakia
| | - Péter Kisszékelyi
- Comenius University in Bratislava Faculty of Natural Sciences Department of Organic Chemistry, Mlynská dolina Ilkovičova 6 842 15 Bratislava Slovakia
| | - Denisa Vargová
- Comenius University in Bratislava Faculty of Natural Sciences Department of Organic Chemistry, Mlynská dolina Ilkovičova 6 842 15 Bratislava Slovakia
| | - Dorota Zakiewicz
- Comenius University in Bratislava Faculty of Natural Sciences Department of Organic Chemistry, Mlynská dolina Ilkovičova 6 842 15 Bratislava Slovakia
| | - Radovan Šebesta
- Comenius University in Bratislava Faculty of Natural Sciences Department of Organic Chemistry, Mlynská dolina Ilkovičova 6 842 15 Bratislava Slovakia
| |
Collapse
|
9
|
Corre Y, Rysak V, Nagyházi M, Kalocsai D, Trivelli X, Djukic J, Agbossou‐Niedercorn F, Michon C. One‐Pot Controlled Reduction of Conjugated Amides by Sequential Double Hydrosilylation Catalyzed by an Iridium(III) Metallacycle. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001061] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Yann Corre
- UCCS UMR 8181 Univ. Lille CNRS, Centrale Lille, Univ. Artois, UMR 8181 – UCCS – Unité de Catalyse et Chimie du Solide 59000 Lille France
| | - Vincent Rysak
- UCCS UMR 8181 Univ. Lille CNRS, Centrale Lille, Univ. Artois, UMR 8181 – UCCS – Unité de Catalyse et Chimie du Solide 59000 Lille France
| | - Márton Nagyházi
- UCCS UMR 8181 Univ. Lille CNRS, Centrale Lille, Univ. Artois, UMR 8181 – UCCS – Unité de Catalyse et Chimie du Solide 59000 Lille France
| | - Dorottya Kalocsai
- UCCS UMR 8181 Univ. Lille CNRS, Centrale Lille, Univ. Artois, UMR 8181 – UCCS – Unité de Catalyse et Chimie du Solide 59000 Lille France
| | - Xavier Trivelli
- IMEC Institut Michel‐Eugène Chevreul FR 2638 Univ. Lille 59000 Lille France
| | - Jean‐Pierre Djukic
- Institut de Chimie de Strasbourg, CNRS UMR 7177 Université de Strasbourg 67000 Strasbourg France
| | - Francine Agbossou‐Niedercorn
- UCCS UMR 8181 Univ. Lille CNRS, Centrale Lille, Univ. Artois, UMR 8181 – UCCS – Unité de Catalyse et Chimie du Solide 59000 Lille France
| | - Christophe Michon
- UCCS UMR 8181 Univ. Lille CNRS, Centrale Lille, Univ. Artois, UMR 8181 – UCCS – Unité de Catalyse et Chimie du Solide 59000 Lille France
- Ecole Européenne de Chimie, Polymères et Matériaux ‐ LIMA UMR 7042, Université de Strasbourg Université de Haute‐Alsace, Ecole Européenne de Chimie, Polymères et Matériaux, CNRS, LIMA, UMR 7042 25 rue Becquerel 67087 Strasbourg France
| |
Collapse
|
10
|
Abstract
The direct enantioselective copper hydride (CuH)-catalyzed synthesis of β-chiral amides from α,β-unsaturated carboxylic acids and secondary amines under mild reaction conditions is reported. The method utilizes readily accessible carboxylic acids and tolerates a variety of functional groups in the β-position including several heteroarenes. A subsequent iridium-catalyzed reduction to γ-chiral amines can be performed in the same flask without purification of the intermediate amides.
Collapse
Affiliation(s)
- Achim Link
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Yujing Zhou
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Stephen L Buchwald
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| |
Collapse
|