1
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Kim S, Song SL, Zhang J, Kim D, Hong S, Chang S. Regio- and Enantioselective Catalytic δ-C-H Amidation of Dioxazolones Enabled by Open-Shell Copper-Nitrenoid Transfer. J Am Chem Soc 2023; 145:16238-16248. [PMID: 37462685 DOI: 10.1021/jacs.3c05258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/27/2023]
Abstract
Controlling regio- and enantioselectivity in C-H functionalization reactions is of paramount importance due to their versatile synthetic utilities. Herein, we describe a new approach for the asymmetric δ-C(sp3)-H amidation catalysis of dioxazolones using a Cu(I) precursor with a chiral bisoxazoline ligand to access six-membered lactams with high to excellent regio- and enantioselectivity (up to >19:1 rr and >99:1 er). Combined experimental and computational mechanistic studies unveiled that the open-shell character of the postulated Cu-nitrenoids enables the regioselective hydrogen atom abstraction and subsequent enantio-determining radical rebound of the resulting carbon radical intermediates. The synthetic utility of this asymmetric cyclization was demonstrated in the diastereoselective introduction of additional functional groups into the chiral δ-lactam skeleton as well as in the rapid access to biorelevant azacyclic compounds.
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Affiliation(s)
- Suhyeon Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea
| | - Se Lin Song
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea
| | - Jianbo Zhang
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea
| | - Dongwook Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea
| | - Sungwoo Hong
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea
| | - Sukbok Chang
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea
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2
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Li Y, Geng L, Song Z, Zhang Z. A DFT study of NHC-catalyzed reactions between 2-bromo-2-enals and acylhydrazones: mechanisms, and chemo- and stereoselectivities. NEW J CHEM 2022. [DOI: 10.1039/d2nj01078j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The reaction mechanisms and origins of the chemo- and stereoselectivities of NHC-catalyzed [4 + 2] annulation of 2-bromo-2-enals and acylhydrazones.
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Affiliation(s)
- Yan Li
- School of Chemical Engineering, University of Science and Technology Liaoning, Anshan, 114051, P. R. China
| | - Lina Geng
- School of Chemical Engineering, University of Science and Technology Liaoning, Anshan, 114051, P. R. China
| | - Zhiyi Song
- School of Chemical Engineering, University of Science and Technology Liaoning, Anshan, 114051, P. R. China
| | - Zhiqiang Zhang
- School of Chemical Engineering, University of Science and Technology Liaoning, Anshan, 114051, P. R. China
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3
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Gao J, Feng J, Du D. Generation of azolium dienolates as versatile nucleophilic synthons via N-heterocyclic carbene catalysis. Org Chem Front 2021. [DOI: 10.1039/d1qo01127h] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The recent advances in N-heterocyclic carbene (NHC)-catalyzed generation of azolium dienolates from different precursors and their synthetic applications for the construction of various valuable molecules are summarized comprehensively in this review.
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Affiliation(s)
- Jian Gao
- Department of Chemistry, State Key Laboratory of Natural Medicines, China Pharmaceutical University, 210009, P. R. China
| | - Jie Feng
- Department of Chemistry, State Key Laboratory of Natural Medicines, China Pharmaceutical University, 210009, P. R. China
| | - Ding Du
- Department of Chemistry, State Key Laboratory of Natural Medicines, China Pharmaceutical University, 210009, P. R. China
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4
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Lee S, Semakul N, Rovis T. Direct Regio‐ and Diastereoselective Synthesis of
δ
‐Lactams from Acrylamides and Unactivated Alkenes Initiated by Rh
III
‐Catalyzed C−H Activation. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201916332] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Sumin Lee
- Department of ChemistryColumbia University New York NY 10027 USA
| | | | - Tomislav Rovis
- Department of ChemistryColumbia University New York NY 10027 USA
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5
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Lee S, Semakul N, Rovis T. Direct Regio- and Diastereoselective Synthesis of δ-Lactams from Acrylamides and Unactivated Alkenes Initiated by Rh III -Catalyzed C-H Activation. Angew Chem Int Ed Engl 2020; 59:4965-4969. [PMID: 32045098 DOI: 10.1002/anie.201916332] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 01/07/2020] [Indexed: 11/09/2022]
Abstract
We report a RhIII -catalyzed regio- and diastereoselective synthesis of δ-lactams from readily available acrylamide derivatives and unactivated alkenes. The reaction provides a rapid route to a diverse set of δ-lactams in good yield and stereoselectivity, which serve as useful building blocks for substituted piperidines. The regioselectivity of the reaction with unactivated terminal alkene is significantly improved by using Cpt ligand on the RhIII catalyst. The synthetic utility of the reaction is demonstrated by the preparation of a potential drug candidate containing a trisubstituted piperidine moiety. Mechanistic studies show that the reversibility of the C-H activation depends on the choice of Cp ligand on the RhIII catalyst. The irreversible C-H activation is observed and becomes turnover-limiting with [Cpt RhCl2 ]2 as catalyst.
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Affiliation(s)
- Sumin Lee
- Department of Chemistry, Columbia University, New York, NY, 10027, USA
| | - Natthawat Semakul
- Department of Chemistry, Columbia University, New York, NY, 10027, USA
| | - Tomislav Rovis
- Department of Chemistry, Columbia University, New York, NY, 10027, USA
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6
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Hassan IS, Ta AN, Danneman MW, Semakul N, Burns M, Basch CH, Dippon VN, McNaughton BR, Rovis T. Asymmetric δ-Lactam Synthesis with a Monomeric Streptavidin Artificial Metalloenzyme. J Am Chem Soc 2019; 141:4815-4819. [PMID: 30865436 DOI: 10.1021/jacs.9b01596] [Citation(s) in RCA: 90] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Reliable design of artificial metalloenzymes (ArMs) to access transformations not observed in nature remains a long-standing and important challenge. We report that a monomeric streptavidin (mSav) Rh(III) ArM permits asymmetric synthesis of α,β-unsaturated-δ-lactams via a tandem C-H activation and [4+2] annulation reaction. These products are readily derivatized to enantioenriched piperidines, the most common N-heterocycle found in FDA approved pharmaceuticals. Desired δ-lactams are achieved in yields as high as 99% and enantiomeric excess of 97% under aqueous conditions at room temperature. Embedding a Rh cyclopentadienyl (Cp*) catalyst in the active site of mSav results in improved stereocontrol and a 7-fold enhancement in reactivity relative to the isolated biotinylated Rh(III) cofactor. In addition, mSav-Rh outperforms its well-established tetrameric forms, displaying 11-33 times more reactivity.
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Affiliation(s)
- Isra S Hassan
- Department of Chemistry , Columbia University , New York , New York 10027 , United States
| | - Angeline N Ta
- Department of Chemistry , Colorado State University , Fort Collins , Colorado 80523 , United States
| | - Michael W Danneman
- Department of Chemistry , Columbia University , New York , New York 10027 , United States.,Department of Chemistry , Colorado State University , Fort Collins , Colorado 80523 , United States
| | - Natthawat Semakul
- Department of Chemistry , Columbia University , New York , New York 10027 , United States.,Department of Chemistry , Colorado State University , Fort Collins , Colorado 80523 , United States
| | - Matthew Burns
- Department of Chemistry , Columbia University , New York , New York 10027 , United States.,Department of Chemistry , Colorado State University , Fort Collins , Colorado 80523 , United States
| | - Corey H Basch
- Department of Chemistry , Columbia University , New York , New York 10027 , United States
| | - Vanessa N Dippon
- Department of Chemistry , Columbia University , New York , New York 10027 , United States
| | - Brian R McNaughton
- Department of Chemistry , Colorado State University , Fort Collins , Colorado 80523 , United States
| | - Tomislav Rovis
- Department of Chemistry , Columbia University , New York , New York 10027 , United States.,Department of Chemistry , Colorado State University , Fort Collins , Colorado 80523 , United States
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7
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Wang Z, Zhang H, Qian H, Wang Y, Yu C, Li T, Yao C. An NHC-catalyzed, stereoselective α-functionalization of α,β-unsaturated carboxylic acids through in situ activation. Org Biomol Chem 2019; 17:4564-4571. [DOI: 10.1039/c8ob03206h] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An N-heterocyclic carbene (NHC)-catalyzed diastereo- and enantioselective α-functionalization of α,β-unsaturated carboxylic acids bearing γ-H to construct dihydrocoumarin was realized through in situ activation.
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Affiliation(s)
- Zhanlin Wang
- School of Chemistry and Materials Science
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P R China
| | - Huiqing Zhang
- School of Chemistry and Materials Science
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P R China
| | - Huimin Qian
- School of Chemistry and Materials Science
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P R China
| | - Yuanfeng Wang
- School of Chemistry and Materials Science
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P R China
| | - Chenxia Yu
- School of Chemistry and Materials Science
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P R China
| | - Tuanjie Li
- School of Chemistry and Materials Science
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P R China
| | - Changsheng Yao
- School of Chemistry and Materials Science
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P R China
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8
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Peng Q, Zhang B, Xie Y, Wang J. Carbene-Catalyzed [4 + 2] Annulation of 2 H-Azirine-2-carboxaldehydes with Ketones via Azolium Aza-Dienolate Intermediate. Org Lett 2018; 20:7641-7644. [PMID: 30479131 DOI: 10.1021/acs.orglett.8b03378] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A new carbene-catalyzed [4 + 2] annulation of 2 H-azirine-2-carbaldehydes with ketones was developed, thus providing the 2,3-dihydro-6 H-1,3-oxazin-6-one core structures with broad scope and good to excellent yields. Notably, the azolium aza-dienolates generated from the addition of NHCs to 2 H-azirines are first uncovered.
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Affiliation(s)
- Qiupeng Peng
- School of Pharmaceutical Sciences, Key Laboratory of Bioorganic Phosphorous Chemistry & Chemical Biology (Ministry of Education) , Tsinghua University , Beijing 100084 , China
| | - Bei Zhang
- School of Pharmaceutical Sciences, Key Laboratory of Bioorganic Phosphorous Chemistry & Chemical Biology (Ministry of Education) , Tsinghua University , Beijing 100084 , China
| | - Yangxi Xie
- School of Pharmaceutical Sciences, Key Laboratory of Bioorganic Phosphorous Chemistry & Chemical Biology (Ministry of Education) , Tsinghua University , Beijing 100084 , China
| | - Jian Wang
- School of Pharmaceutical Sciences, Key Laboratory of Bioorganic Phosphorous Chemistry & Chemical Biology (Ministry of Education) , Tsinghua University , Beijing 100084 , China
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9
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Chen XY, Liu Q, Chauhan P, Enders D. N-Heterocyclic Carbene Catalysis via Azolium Dienolates: An Efficient Strategy for Remote Enantioselective Functionalizations. Angew Chem Int Ed Engl 2018; 57:3862-3873. [DOI: 10.1002/anie.201709684] [Citation(s) in RCA: 186] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Indexed: 12/11/2022]
Affiliation(s)
- Xiang-Yu Chen
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Qiang Liu
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Pankaj Chauhan
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Dieter Enders
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
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10
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Chen XY, Liu Q, Chauhan P, Enders D. Katalyse durch N-heterocyclische Carbene über Azoliumdienolate: eine effiziente Strategie für enantioselektive Funktionalisierungen an entfernten Positionen. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201709684] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Xiang-Yu Chen
- Institut für Organische Chemie; RWTH Aachen; Landoltweg 1 52074 Aachen Deutschland
| | - Qiang Liu
- Institut für Organische Chemie; RWTH Aachen; Landoltweg 1 52074 Aachen Deutschland
| | - Pankaj Chauhan
- Institut für Organische Chemie; RWTH Aachen; Landoltweg 1 52074 Aachen Deutschland
| | - Dieter Enders
- Institut für Organische Chemie; RWTH Aachen; Landoltweg 1 52074 Aachen Deutschland
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11
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Du Y, Liu Y, Wan JP. Copper-Catalyzed One-Pot N-Acylation and C5–H Halogenation of 8-Aminoquinolines: The Dual Role of Acyl Halides. J Org Chem 2018; 83:3403-3408. [DOI: 10.1021/acs.joc.8b00068] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yi Du
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China
| | - Yunyun Liu
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China
| | - Jie-Ping Wan
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China
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12
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Liu Q, Chen XY, Li S, Jafari E, Raabe G, Enders D. N-Heterocyclic carbene-catalyzed [4+2] annulation of β-methyl enals and cyclic trifluoromethyl ketimines for the asymmetric synthesis of dihydroquinazolinone derivatives. Chem Commun (Camb) 2017; 53:11342-11344. [DOI: 10.1039/c7cc06562k] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The enantioselective oxidative N-heterocyclic carbene-catalyzed [4+2] annulation reaction of β-methyl enals and cyclic trifluoromethyl ketimines has been developed.
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Affiliation(s)
- Qiang Liu
- Institute of Organic Chemistry
- RWTH Aachen University
- 52074 Aachen
- Germany
| | - Xiang-Yu Chen
- Institute of Organic Chemistry
- RWTH Aachen University
- 52074 Aachen
- Germany
| | - Sun Li
- Institute of Organic Chemistry
- RWTH Aachen University
- 52074 Aachen
- Germany
| | - Ehsan Jafari
- Institute of Organic Chemistry
- RWTH Aachen University
- 52074 Aachen
- Germany
| | - Gerhard Raabe
- Institute of Organic Chemistry
- RWTH Aachen University
- 52074 Aachen
- Germany
| | - Dieter Enders
- Institute of Organic Chemistry
- RWTH Aachen University
- 52074 Aachen
- Germany
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13
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Zhao LL, Li XS, Cao LL, Zhang R, Shi XQ, Qi J. Access to dihydropyridinones and spirooxindoles: application of N-heterocyclic carbene-catalyzed [3+3] annulation of enals and oxindole-derived enals with 2-aminoacrylates. Chem Commun (Camb) 2017; 53:5985-5988. [DOI: 10.1039/c7cc02753b] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A strategy for the NHC-catalyzed synthesis of dihydropyridinones and spirooxindoles has been developed via [3+3] annulation reactions of enals or isatin-derived enals with 2-aminoacrylates under oxidative conditions.
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Affiliation(s)
- Liang-Liang Zhao
- Key Laboratory of Chemical Biology of Hebei Province
- College of Chemistry and Environmental Science
- Hebei University
- Baoding 071002
- People's Republic of China
| | - Xing-Shuo Li
- Key Laboratory of Chemical Biology of Hebei Province
- College of Chemistry and Environmental Science
- Hebei University
- Baoding 071002
- People's Republic of China
| | - Li-Li Cao
- Key Laboratory of Chemical Biology of Hebei Province
- College of Chemistry and Environmental Science
- Hebei University
- Baoding 071002
- People's Republic of China
| | - Rui Zhang
- Key Laboratory of Chemical Biology of Hebei Province
- College of Chemistry and Environmental Science
- Hebei University
- Baoding 071002
- People's Republic of China
| | - Xiao-Qian Shi
- Key Laboratory of Chemical Biology of Hebei Province
- College of Chemistry and Environmental Science
- Hebei University
- Baoding 071002
- People's Republic of China
| | - Jing Qi
- Key Laboratory of Chemical Biology of Hebei Province
- College of Chemistry and Environmental Science
- Hebei University
- Baoding 071002
- People's Republic of China
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14
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Vellalath S, Romo D. Asymmetric Organocatalysis: The Emerging Utility of α,β-Unsaturated Acylammonium Salts. Angew Chem Int Ed Engl 2016; 55:13934-13943. [PMID: 27650693 PMCID: PMC5523468 DOI: 10.1002/anie.201602217] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Revised: 04/12/2016] [Indexed: 11/06/2022]
Abstract
Although acylammonium salts are well-studied, chiral α,β-unsaturated acylammonium salts have received much less attention. While these intermediates are convenient synthons, which are readily available from several commodity unsaturated acids and acid chlorides, and possess three reactive sites, their application in organic synthesis has been limited because of the lack of appropriate chiral Lewis bases for their generation. In recent years, the utility of chiral, unsaturated acylammonium salts has expanded considerably, thus demonstrating the unique reactivity of this intermediate leading to the development of a diverse array of catalytic, asymmetric transformations including organocascade processes. This Minireview highlights the recent and growing interest in these intermediates which might spark further research into their untapped potential for asymmetric organocascade catalysis. A cursory comparison is made to related unsaturated iminium and acylazolium intermediates.
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Affiliation(s)
- Sreekumar Vellalath
- Department of Chemistry and Biochemistry, Baylor University, Waco, TX, 76798, USA
| | - Daniel Romo
- Department of Chemistry and Biochemistry, Baylor University, Waco, TX, 76798, USA.
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15
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Vellalath S, Romo D. Asymmetrische Organokatalyse: α,β‐ungesättigte Acylammoniumsalze erweisen sich als immer nützlicher. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201602217] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Sreekumar Vellalath
- Department of Chemistry and Biochemistry Baylor University Waco TX 76798 USA
| | - Daniel Romo
- Department of Chemistry and Biochemistry Baylor University Waco TX 76798 USA
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16
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Kumar K, Siddique J, Gangar M, Goyal S, Rawal RK, Nair VA. ZrCl4
Catalysed Diastereoselective Synthesis of Spirocarbocyclic Oxindoles via
[4+2] Cycloaddition. ChemistrySelect 2016. [DOI: 10.1002/slct.201600447] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Kapil Kumar
- Department of Medicinal Chemistry; National Institute of Pharmaceutical Education and Research; Sector 67; SAS Nagar; Punjab 160062 India
- Department of Pharmaceutical Chemistry; Indo-Soviet Friendship College of Pharmacy; Moga Punjab 142001 India
| | - Julekha Siddique
- Department of Medicinal Chemistry; National Institute of Pharmaceutical Education and Research; Sector 67; SAS Nagar; Punjab 160062 India
| | - Mukesh Gangar
- Department of Medicinal Chemistry; National Institute of Pharmaceutical Education and Research; Sector 67; SAS Nagar; Punjab 160062 India
| | - Sandeep Goyal
- Department of Medicinal Chemistry; National Institute of Pharmaceutical Education and Research; Sector 67; SAS Nagar; Punjab 160062 India
| | - Ravindra K. Rawal
- Department of Pharmaceutical Chemistry; Indo-Soviet Friendship College of Pharmacy; Moga Punjab 142001 India
| | - Vipin A. Nair
- Department of Medicinal Chemistry; National Institute of Pharmaceutical Education and Research; Sector 67; SAS Nagar; Punjab 160062 India
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17
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Que Y, Xie Y, Li T, Yu C, Tu S, Yao C. An N-Heterocyclic Carbene-Catalyzed Oxidative γ-Aminoalkylation of Saturated Carboxylic Acids through in Situ Activation Strategy: Access to δ-Lactam. Org Lett 2015; 17:6234-7. [DOI: 10.1021/acs.orglett.5b03223] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Yonglei Que
- Jangsu Key Laboratory of
Green Synthetic Chemistry for Functional Materials, School of Chemistry
and Chemical Engineering, Jiangsu Normal University, Xuzhou Jiangsu 221116, P. R. China
| | - Yuanwei Xie
- Jangsu Key Laboratory of
Green Synthetic Chemistry for Functional Materials, School of Chemistry
and Chemical Engineering, Jiangsu Normal University, Xuzhou Jiangsu 221116, P. R. China
| | - Tuanjie Li
- Jangsu Key Laboratory of
Green Synthetic Chemistry for Functional Materials, School of Chemistry
and Chemical Engineering, Jiangsu Normal University, Xuzhou Jiangsu 221116, P. R. China
| | - Chenxia Yu
- Jangsu Key Laboratory of
Green Synthetic Chemistry for Functional Materials, School of Chemistry
and Chemical Engineering, Jiangsu Normal University, Xuzhou Jiangsu 221116, P. R. China
| | - Shujiang Tu
- Jangsu Key Laboratory of
Green Synthetic Chemistry for Functional Materials, School of Chemistry
and Chemical Engineering, Jiangsu Normal University, Xuzhou Jiangsu 221116, P. R. China
| | - Changsheng Yao
- Jangsu Key Laboratory of
Green Synthetic Chemistry for Functional Materials, School of Chemistry
and Chemical Engineering, Jiangsu Normal University, Xuzhou Jiangsu 221116, P. R. China
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18
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Xie Y, Que Y, Li T, Zhu L, Yu C, Yao C. N-heterocyclic carbene-catalyzed [4 + 2] cyclization of 2-bromo-2-enal with 3-alkylenyloxindoles: efficient assembly of spirocarbocyclic oxindole. Org Biomol Chem 2015; 13:1829-35. [DOI: 10.1039/c4ob01706d] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A NHC-catalyzed [4 + 2] cyclization of 2-bromo-2-enal bearing γ-H with 3-alkylenyloxindoles under mild reaction conditions gives spirocarbocyclic oxindoles containing one quaternary carbon with high diastereoselectivies.
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Affiliation(s)
- Yuanwei Xie
- School of Chemistry and Chemical Engineering
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Yonglei Que
- School of Chemistry and Chemical Engineering
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Tuanjie Li
- School of Chemistry and Chemical Engineering
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Ling Zhu
- School of Chemistry and Chemical Engineering
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Chenxia Yu
- School of Chemistry and Chemical Engineering
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Changsheng Yao
- School of Chemistry and Chemical Engineering
- Key Laboratory of Biotechnology for Medicinal Plant
- Jiangsu Normal University
- Xuzhou
- P. R. China
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