1
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Li Y, Shi H, Yin G. Synthetic techniques for thermodynamically disfavoured substituted six-membered rings. Nat Rev Chem 2024; 8:535-550. [PMID: 38822206 DOI: 10.1038/s41570-024-00612-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/26/2024] [Indexed: 06/02/2024]
Abstract
Six-membered rings are ubiquitous structural motifs in bioactive compounds and multifunctional materials. Notably, their thermodynamically disfavoured isomers, like disubstituted cyclohexanes featuring one substituent in an equatorial position and the other in an axial position, often exhibit enhanced physical and biological activities in comparison with their opposite isomers. However, the synthesis of thermodynamically disfavoured isomers is, by its nature, challenging, with only a limited number of possible approaches. In this Review, we summarize and compare synthetic methodologies that produce substituted six-membered rings with thermodynamically disfavoured substitution patterns. We place particular emphasis on elucidating the crucial stereoinduction factors within each transformation. Our aim is to stimulate interest in the synthesis of these unique structures, while simultaneously providing synthetic chemists with a guide to approaching this synthetic challenge.
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Affiliation(s)
- Yangyang Li
- The Institute for Advanced Studies, Wuhan University, Wuhan, Hubei Province, China
| | - Hongjin Shi
- The Institute for Advanced Studies, Wuhan University, Wuhan, Hubei Province, China
| | - Guoyin Yin
- The Institute for Advanced Studies, Wuhan University, Wuhan, Hubei Province, China.
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2
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Yamada T, Hashimoto Y, Tanaka K, Morita N, Tamura O. Cationic palladium(ii)-catalyzed synthesis of substituted pyridines from α,β-unsaturated oxime ethers. RSC Adv 2022; 12:21548-21557. [PMID: 36043185 PMCID: PMC9351437 DOI: 10.1039/d2ra03875g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 07/14/2022] [Indexed: 11/21/2022] Open
Abstract
An efficient method for the synthesis of multi-substituted pyridines from β-aryl-substituted α,β-unsaturated oxime ethers and alkenes via Pd-catalyzed C–H activation has been developed. The method, using Pd(OAc)2 and a sterically hindered pyridine ligand, provides access to various multi-substituted pyridines with complete regioselectivity. Mechanistic studies suggest that the pyridine products are formed by Pd-catalyzed electrophilic C–H alkenylation of α,β-unsaturated oxime followed by aza-6π-electrocyclization. The utility of this method is showcased by the synthesis of 4-aryl-substituted pyridine derivatives, which are difficult to synthesize efficiently using previously reported Rh-catalyzed strategies with alkenes. An efficient method for the synthesis of multi-substituted pyridines from α,β-unsaturated oxime ethers via cationic Pd(ii)-catalyzed C–H activation has been developed.![]()
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Affiliation(s)
- Takahiro Yamada
- Showa Pharmaceutical University Machida Tokyo 194-8543 Japan
| | | | - Kosaku Tanaka
- Showa Pharmaceutical University Machida Tokyo 194-8543 Japan
| | | | - Osamu Tamura
- Showa Pharmaceutical University Machida Tokyo 194-8543 Japan
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3
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Laina-Martín V, Humbrías-Martín J, Mas-Ballesté R, Fernández-Salas JA, Alemán J. Enantioselective Inverse-Electron Demand Aza-Diels-Alder Reaction: ipso,α-Selectivity of Silyl Dienol Ethers. ACS Catal 2021; 11:12133-12145. [PMID: 34621594 PMCID: PMC8491166 DOI: 10.1021/acscatal.1c03390] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Indexed: 12/27/2022]
Abstract
![]()
A highly
efficient enantioselective inverse-electron-demand aza-Diels–Alder
reaction between aza-sulfonyl-1-aza-1,3-butadienes and silyl (di)enol
ethers has been developed. The presented methodology allows the synthesis
of benzofuran-fused 2-piperidinol derivatives with three contiguous
stereocenters in a highly selective manner, as even the hemiaminal
center is completely stereocontrolled. Density functional theory (DFT)
calculations support that the hydrogen-bond donor-based bifunctional
organocatalyst selectively triggers the reaction through the ipso,α-position
of the dienophile, in contrast to the reactivity observed for dienolates
in situ generated from β,γ-unsaturated derivatives. Moreover,
the calculations have clarified the mechanism of the reaction and
the ability of the hydrogen-bond donor core to hydrolyze selectively
the E isomer of the dienol ether. Furthermore, to
demonstrate the applicability of silyl enol ethers as nucleophiles
in the asymmetric synthesis of interesting benzofuran-fused derivatives,
the catalytic system has also been implemented for the highly efficient
installation of an aromatic ring in the piperidine adducts.
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Affiliation(s)
- Víctor Laina-Martín
- Departamento de Química Orgánica (módulo 1), Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
| | - Jorge Humbrías-Martín
- Departamento de Química Orgánica (módulo 1), Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
| | - Rubén Mas-Ballesté
- Departamento de Química Inorgánica (módulo 7), Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Jose A. Fernández-Salas
- Departamento de Química Orgánica (módulo 1), Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
- Departamento de Química Inorgánica (módulo 7), Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
| | - José Alemán
- Departamento de Química Orgánica (módulo 1), Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
- Departamento de Química Inorgánica (módulo 7), Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
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4
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Laina‐Martín V, Fernández‐Salas JA, Alemán J. Organocatalytic Strategies for the Development of the Enantioselective Inverse-electron-demand Hetero-Diels-Alder Reaction. Chemistry 2021; 27:12509-12520. [PMID: 34132427 PMCID: PMC8456916 DOI: 10.1002/chem.202101696] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Indexed: 12/20/2022]
Abstract
Cycloaddition reactions, in particular Diels-Alder reactions, have attracted a lot of attention from organic chemists since they represent one of the most powerful methodologies for the construction of carbon-carbon bonds. In particular, inverse-electron-demand hetero-Diels-Alder reactions have been an important breakthrough for the synthesis of heterocyclic compounds. Among all their variants, the organocatalytic enantioselective version has been widely explored since the asymmetric construction of diversely functionalized scaffolds under reaction conditions encompassed within the green chemistry field is of great interest. In this review, a profound revision on the latest advances on the organocatalytic asymmetric inverse-electron demand hetero-Diels-Alder reaction is shown.
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Affiliation(s)
- Víctor Laina‐Martín
- Departamento de Química Orgánica (módulo 1) Facultad de CienciasUniversidad Autónoma de Madrid28049-MadridSpain
| | - Jose A. Fernández‐Salas
- Departamento de Química Orgánica (módulo 1) Facultad de CienciasUniversidad Autónoma de Madrid28049-MadridSpain
- Institute for Advanced Research in Chemical Sciences (IAdChem)Universidad Autónoma de Madrid28049-MadridSpain
| | - José Alemán
- Departamento de Química Orgánica (módulo 1) Facultad de CienciasUniversidad Autónoma de Madrid28049-MadridSpain
- Institute for Advanced Research in Chemical Sciences (IAdChem)Universidad Autónoma de Madrid28049-MadridSpain
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5
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Lopes SMM, Santos JRC, Pinho E Melo TMVD. Reactivity of steroidal 1-azadienes toward enamines: an approach to novel chiral penta- and hexacyclic steroids. Org Biomol Chem 2021; 19:1122-1132. [PMID: 33438706 DOI: 10.1039/d0ob02344b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The chemical behavior of steroidal N-sulfonyl-1-azadienes toward carbonyl compounds, in the presence of pyrrolidine, is described. With aldehydes, these azadienes participate in hetero-Diels-Alder reactions with the in situ generated enamines. The stereoselectivity results from the approach of the dienophiles from the less hindered α-face of the steroid, with the pyrrolidine moiety endo and retention of the enamine trans geometry. This diastereoselective synthetic methodology led to a new class of chiral pentacyclic steroids. Interestingly, the studied steroidal scaffolds follow a different mechanistic pathway with cyclic ketones. They undergo a diastereoselective annulation reaction, under enamine catalysis, affording chiral hexacyclic steroids.
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Affiliation(s)
- Susana M M Lopes
- University of Coimbra, Coimbra Chemistry Centre and Department of Chemistry, 3004-535 Coimbra, Portugal.
| | - Joana R C Santos
- University of Coimbra, Coimbra Chemistry Centre and Department of Chemistry, 3004-535 Coimbra, Portugal.
| | - Teresa M V D Pinho E Melo
- University of Coimbra, Coimbra Chemistry Centre and Department of Chemistry, 3004-535 Coimbra, Portugal.
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6
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Varlet T, Masson G. Enamides and dienamides in phosphoric acid-catalysed enantioselective cycloadditions for the synthesis of chiral amines. Chem Commun (Camb) 2021; 57:4089-4105. [DOI: 10.1039/d1cc00590a] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
This feature article describes how enamides and dienamides can participate in chiral phosphoric acid catalyzed enantioselective cycloadditions to prepare a wide range of cyclic amines.
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Affiliation(s)
- Thomas Varlet
- Université Paris-Saclay
- Institut de Chimie des Substances Naturelles
- ICSN-CNRS UPR 2301
- 91198 Gif-sur-Yvette
- France
| | - Géraldine Masson
- Université Paris-Saclay
- Institut de Chimie des Substances Naturelles
- ICSN-CNRS UPR 2301
- 91198 Gif-sur-Yvette
- France
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7
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Skrzyńska A, Frankowski S, Albrecht Ł. Cyclic 1‐Azadienes in the Organocatalytic Inverse‐Electron‐Demand Aza‐Diels‐Alder Cycloadditions. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000332] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Anna Skrzyńska
- Institute of Organic Chemistry Faculty of Chemistry Lodz University of Technology Żeromskiego 116 90-924 Łódź Poland
| | - Sebastian Frankowski
- Institute of Organic Chemistry Faculty of Chemistry Lodz University of Technology Żeromskiego 116 90-924 Łódź Poland
| | - Łukasz Albrecht
- Institute of Organic Chemistry Faculty of Chemistry Lodz University of Technology Żeromskiego 116 90-924 Łódź Poland
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8
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He S, Gu H, He YP, Yang X. Asymmetric Aza-Diels–Alder Reactions of in Situ Generated β,β-Disubstituted α,β-Unsaturated N–H Ketimines Catalyzed by Chiral Phosphoric Acids. Org Lett 2020; 22:5633-5639. [DOI: 10.1021/acs.orglett.0c01994] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Shunlong He
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
- College of Chemistry, Chemical Engineering and Environmental Engineering, Liaoning Shihua University, Fushun 113001, China
| | - Huanchao Gu
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Yu-Peng He
- College of Chemistry, Chemical Engineering and Environmental Engineering, Liaoning Shihua University, Fushun 113001, China
| | - Xiaoyu Yang
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
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9
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10
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Ghosh T. Reductive Heck Reaction: An Emerging Alternative in Natural Product Synthesis. ChemistrySelect 2019. [DOI: 10.1002/slct.201804029] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Tapas Ghosh
- Department of Natural SciencesMaulana Abul Kalam Azad University of Technology Haringhata – 741249, Nadia, West Bengal India
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11
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Grzelak P, Saktura M, Sieroń L, Albrecht Ł. Intramolecular [2+2]‐Cycloaddition in the Synthesis of Polycyclic Tetrahydrothiopyran Derivatives Bearing a Cyclobutane Scaffold. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201801739] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Paulina Grzelak
- Institute of Organic Chemistry, Faculty of ChemistryLodz University of Technology Żeromskiego 116 90-924 Łódź Poland
| | - Maciej Saktura
- Institute of Organic Chemistry, Faculty of ChemistryLodz University of Technology Żeromskiego 116 90-924 Łódź Poland
| | - Lesław Sieroń
- Institute of General and Ecological Chemistry, Faculty of ChemistryLodz University of Technology Żeromskiego 116 90-924 Łódź Poland
| | - Łukasz Albrecht
- Institute of Organic Chemistry, Faculty of ChemistryLodz University of Technology Żeromskiego 116 90-924 Łódź Poland
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12
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Chen YH, Li DH, Liu YK. Diversified Synthesis of Chiral Chromane-Containing Polyheterocyclic Compounds via Asymmetric Organocatalytic Cascade Reactions. ACS OMEGA 2018; 3:16615-16625. [PMID: 31458293 PMCID: PMC6643940 DOI: 10.1021/acsomega.8b02891] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2018] [Accepted: 11/27/2018] [Indexed: 06/10/2023]
Abstract
Two different organocatalytic cascade reaction pathways have been developed toward the diversified synthesis of chromane-containing polyheterocyclic compounds from the readily available starting materials. The application of Hantzsch ester is proposed to be the key to achieve the switch between these two different cascade reaction pathways, and then the electron-deficient 1-aza-1,3-butadienes could be used as the four-atom and two-carbon unit, respectively, to react with 2-hydroxy cinnamaldehydes in a highly regio- and stereocontrolled manner. On the basis of larger-scale synthesis, further transformations of the obtained products have also been realized, leading to cycloadducts with high structural and stereogenic complexity bearing five stereogenic centers, and one is a tetrasubstituted stereocenter.
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Affiliation(s)
- Ying-Han Chen
- Key
Laboratory of Marine Drugs, Chinese Ministry of Education, School
of Medicine and Pharmacy and Laboratory for Marine Drugs and Bioproducts
of Qingdao National Laboratory for Marine Science and Technology, Ocean University of China, Qingdao 266003, China
| | - De-Hai Li
- Key
Laboratory of Marine Drugs, Chinese Ministry of Education, School
of Medicine and Pharmacy and Laboratory for Marine Drugs and Bioproducts
of Qingdao National Laboratory for Marine Science and Technology, Ocean University of China, Qingdao 266003, China
| | - Yan-Kai Liu
- Key
Laboratory of Marine Drugs, Chinese Ministry of Education, School
of Medicine and Pharmacy and Laboratory for Marine Drugs and Bioproducts
of Qingdao National Laboratory for Marine Science and Technology, Ocean University of China, Qingdao 266003, China
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13
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Bai Z, Tong H, Wang H, Chen G, He G. Synthesis of 2,3-Fused Indoline Aminals via
4 + 2 Cycloaddition of NH-free Benzazetidines with Indoles. CHINESE J CHEM 2018. [DOI: 10.1002/cjoc.201800483] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Zibo Bai
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry; Nankai University; Tianjin 300071 China
| | - Huarong Tong
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry; Nankai University; Tianjin 300071 China
| | - Hao Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry; Nankai University; Tianjin 300071 China
| | - Gong Chen
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry; Nankai University; Tianjin 300071 China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Tianjin 300071 China
| | - Gang He
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry; Nankai University; Tianjin 300071 China
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14
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Lopes SMM, Gomes CSB, Pinho E Melo TMVD. Reactivity of Steroidal 1-Azadienes toward Carbonyl Compounds under Enamine Catalysis: Chiral Penta- and Hexacyclic Steroids. Org Lett 2018; 20:4332-4336. [PMID: 29984581 DOI: 10.1021/acs.orglett.8b01783] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The synthesis and reactivity of a steroidal N-sulfonyl-1-azadiene, derived from 16-dehydropregnenolone acetate, toward carbonyl compounds under enamine catalysis is disclosed. An unexpected annulation reaction was observed involving an initial stereoselective conjugate addition of the in situ generated enamine to the steroidal 1-azadiene. The developed diastereoselective synthetic methodology is a novel approach to a new class of chiral pentacyclic and hexacyclic steroids.
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Affiliation(s)
- Susana M M Lopes
- CQC and Department of Chemistry , University of Coimbra , 3004-535 Coimbra , Portugal
| | - Clara S B Gomes
- Centro de Química Estrutural, Instituto Superior Técnico , Universidade de Lisboa , Av. Rovisco Pais , 1049-001 Lisboa , Portugal
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15
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Differential reactivity of 3H-indole styrylcyanines: Intermolecular [4π + 2π] cycloaddition vs. proton - shift coupled six - electron electrocyclization. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.04.085] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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16
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Yu S, An Y, Wang W, Xu ZF, Li CY. Synthesis of Piperidine Derivatives by Rhodium- Catalyzed Tandem Reaction of N
-Sulfonyl-1,2,3-Triazole and Vinyl Ether. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800191] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Sisi Yu
- Department of Chemistry; Zhejiang Sci-Tech University, Xiasha West Higher Education District; Hangzhou 310018 People's Republic of China
| | - Yuehui An
- Department of Chemistry; Zhejiang Sci-Tech University, Xiasha West Higher Education District; Hangzhou 310018 People's Republic of China
| | - Wenlin Wang
- Department of Chemistry; Zhejiang Sci-Tech University, Xiasha West Higher Education District; Hangzhou 310018 People's Republic of China
| | - Ze-Feng Xu
- Department of Chemistry; Zhejiang Sci-Tech University, Xiasha West Higher Education District; Hangzhou 310018 People's Republic of China
| | - Chuan-Ying Li
- Department of Chemistry; Zhejiang Sci-Tech University, Xiasha West Higher Education District; Hangzhou 310018 People's Republic of China
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17
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Yang WJ, Sun Q, Sun J, Yan CG. Domino aza/oxa-hetero-Diels–Alder reaction for construction of novel spiro[pyrido[3′,2′:5,6]pyrano[2,3-d]pyrimidine-7,5′-pyrimidine]. Org Chem Front 2018. [DOI: 10.1039/c8qo00784e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The unprecedented reaction of α,β-unsaturated N-arylaldimines with two molecular 5-arylidene-1,3-dimethylbarbituric acids in methylene dichloride at room temperature afforded unique spiro[pyrido[3′,2′:5,6]pyrano[2,3-d]pyrimidine-7,5′-pyrimidines] in moderate to good yields and with high diastereoselectivity.
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Affiliation(s)
- Wen-Juan Yang
- College of Chemistry & Chemical Engineering
- Yangzhou University
- Yangzhou 225002
- China
| | - Qiu Sun
- College of Chemistry & Chemical Engineering
- Yangzhou University
- Yangzhou 225002
- China
| | - Jing Sun
- College of Chemistry & Chemical Engineering
- Yangzhou University
- Yangzhou 225002
- China
| | - Chao-Guo Yan
- College of Chemistry & Chemical Engineering
- Yangzhou University
- Yangzhou 225002
- China
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18
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Shainyan BA, Chipanina NN, Oznobikhina LP. Pathways of cycloaddition of carbodiimides to N -alkenylidenetriflamides: A theoretical study. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.04.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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19
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Fell JS, Martin BN, Houk KN. Origins of the Unfavorable Activation and Reaction Energies of 1-Azadiene Heterocycles Compared to 2-Azadiene Heterocycles in Diels–Alder Reactions. J Org Chem 2017; 82:1912-1919. [DOI: 10.1021/acs.joc.6b02524] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Jason S. Fell
- Department of Chemistry and
Biochemistry, University of California, Los Angeles, California 90095-1569, United States
| | - Blanton N. Martin
- Department of Chemistry and
Biochemistry, University of California, Los Angeles, California 90095-1569, United States
| | - K. N. Houk
- Department of Chemistry and
Biochemistry, University of California, Los Angeles, California 90095-1569, United States
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20
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Zhou Z, Wang ZX, Ouyang Q, Xiao W, Du W, Chen YC. Cross-conjugated Trienamine Catalysis with α′-Alkylidene 2-Cyclohexenones: Application in β,γ-Regioselective Aza-Diels-Alder Reaction. Chemistry 2017; 23:2945-2949. [PMID: 28019058 DOI: 10.1002/chem.201605606] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Indexed: 01/18/2023]
Affiliation(s)
- Zhi Zhou
- Department of Medicinal Chemistry; West China School of Pharmacy; Sichuan University; Chengdu 610041 P. R. China
| | - Zhou-Xiang Wang
- Department of Medicinal Chemistry; West China School of Pharmacy; Sichuan University; Chengdu 610041 P. R. China
| | - Qin Ouyang
- College of Pharmacy; Third Military Medical University; Chongqing 400038 P. R. China
| | - Wei Xiao
- Department of Medicinal Chemistry; West China School of Pharmacy; Sichuan University; Chengdu 610041 P. R. China
| | - Wei Du
- Department of Medicinal Chemistry; West China School of Pharmacy; Sichuan University; Chengdu 610041 P. R. China
| | - Ying-Chun Chen
- Department of Medicinal Chemistry; West China School of Pharmacy; Sichuan University; Chengdu 610041 P. R. China
- College of Pharmacy; Third Military Medical University; Chongqing 400038 P. R. China
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21
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Hejmanowska J, Jasiński M, Wojciechowski J, Mlostoń G, Albrecht Ł. The first organocatalytic, ortho-regioselective inverse-electron-demand hetero-Diels–Alder reaction. Chem Commun (Camb) 2017; 53:11472-11475. [DOI: 10.1039/c7cc06518c] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The development of the unprecedented ortho-regioselective inverse-electron-demand hetero-Diels–Alder (IEDHDA) reaction is described.
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Affiliation(s)
- Joanna Hejmanowska
- Institute of Organic Chemistry, Department of Chemistry, Lodz University of Technology
- 90-924 Łódź
- Poland
| | - Marcin Jasiński
- Department of Organic and Applied Chemistry, University of Lodz
- 91-403 Łódź
- Poland
| | - Jakub Wojciechowski
- Institute of General and Ecological Chemistry, Department of Chemistry, Lodz University of Technology
- 90-924 Łódź
- Poland
| | - Grzegorz Mlostoń
- Department of Organic and Applied Chemistry, University of Lodz
- 91-403 Łódź
- Poland
| | - Łukasz Albrecht
- Institute of Organic Chemistry, Department of Chemistry, Lodz University of Technology
- 90-924 Łódź
- Poland
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22
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Yu L, Cheng Y, Qi F, Li R, Li P. Organocatalytic regioselective, diastereoselective, and enantioselective annulation of cyclic 1-azadienes with γ-nitro ketones via 3,4-cyclization. Org Chem Front 2017. [DOI: 10.1039/c6qo00832a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A regio-, diastereo-, and enantioselective [2 + 4] annulation reaction of cyclic 1-azadienes with γ-nitro ketones is reported.
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Affiliation(s)
- Lu Yu
- Department of Chemistry
- South University of Science and Technology of China
- Shenzhen
- China
| | - Yuyu Cheng
- Department of Chemistry
- South University of Science and Technology of China
- Shenzhen
- China
| | - Fei Qi
- Department of Chemistry
- South University of Science and Technology of China
- Shenzhen
- China
| | - Rou Li
- Department of Chemistry
- South University of Science and Technology of China
- Shenzhen
- China
| | - Pengfei Li
- Department of Chemistry
- South University of Science and Technology of China
- Shenzhen
- China
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23
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Liu R, Shi RG, Sun J, Yan CG. A [3 + 2]–[4 + 2]–[3 + 2] cycloaddition sequence of isoquinolinium ylide. Org Chem Front 2017. [DOI: 10.1039/c6qo00615a] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A unique [3 + 2]–[4 + 2]–[3 + 2] cycloaddition sequence of isoquinolinium ylide is investigated to afford polycyclic compounds with ten stereogenic centers.
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Affiliation(s)
- Ruzhang Liu
- College of Chemistry and Chemical Engineering
- Yangzhou University
- Yangzhou 225002
- China
| | - Rong-Guo Shi
- College of Chemistry and Chemical Engineering
- Yangzhou University
- Yangzhou 225002
- China
| | - Jing Sun
- College of Chemistry and Chemical Engineering
- Yangzhou University
- Yangzhou 225002
- China
| | - Chao-Guo Yan
- College of Chemistry and Chemical Engineering
- Yangzhou University
- Yangzhou 225002
- China
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24
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Shainyan BA, Tolstikova LL, Sterkhova IV. Unusual [2+2]-cycloaddition of carbodiimides to N-alkenylidenetriflamides. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.08.078] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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25
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Saunthwal RK, Patel M, Verma AK. Regioselective Synthesis of C-3-Functionalized Quinolines via Hetero-Diels–Alder Cycloaddition of Azadienes with Terminal Alkynes. J Org Chem 2016; 81:6563-72. [DOI: 10.1021/acs.joc.6b01186] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Rakesh K. Saunthwal
- Synthetic Organic Chemistry
Research Laboratory, Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Monika Patel
- Synthetic Organic Chemistry
Research Laboratory, Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Akhilesh K. Verma
- Synthetic Organic Chemistry
Research Laboratory, Department of Chemistry, University of Delhi, Delhi 110007, India
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26
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Tay GC, Sizemore N, Rychnovsky SD. Stereoselection in Intramolecular Diels–Alder Reactions of 2-Cyano-1-azadienes: Indolizidine and Quinolizidine Synthesis. Org Lett 2016; 18:3050-3. [PMID: 27295460 DOI: 10.1021/acs.orglett.6b00881] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gidget C. Tay
- Department of Chemistry, 1102 Natural Sciences II, University of California, Irvine, California 92697-2025, United States
| | - Nicholas Sizemore
- Department of Chemistry, 1102 Natural Sciences II, University of California, Irvine, California 92697-2025, United States
| | - Scott D. Rychnovsky
- Department of Chemistry, 1102 Natural Sciences II, University of California, Irvine, California 92697-2025, United States
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27
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Saunthwal RK, Patel M, Verma AK. Metal- and Protection-Free [4 + 2] Cycloadditions of Alkynes with Azadienes: Assembly of Functionalized Quinolines. Org Lett 2016; 18:2200-3. [PMID: 27119774 DOI: 10.1021/acs.orglett.6b00817] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A base promoted, protection-free, and regioselective synthesis of highly functionalized quinolines via [4 + 2] cycloaddition of azadienes (generated in situ from o-aminobenzyl alcohol) with internal alkynes has been discovered. The reaction tolerates a wide variety of functional groups which has been successfully extended with diynes, (2-aminopyridin-3-yl)methanol, and 1,4-bis(phenylethynyl)benzene to afford (Z)-phenyl-2-styrylquinolines, phenylnaphthyridine, and alkyne-substituted quinolines, respectively. The proposed mechanism and significant role of the solvent were well supported by isolating the azadiene intermediate and deuterium-labeling studies.
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Affiliation(s)
| | - Monika Patel
- Department of Chemistry, University of Delhi , Delhi 110007, India
| | - Akhilesh K Verma
- Department of Chemistry, University of Delhi , Delhi 110007, India
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28
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Belskaya NP, Eliseeva AI, Bakulev VA. Hydrazones as substrates for cycloaddition reactions. RUSSIAN CHEMICAL REVIEWS 2015. [DOI: 10.1070/rcr4463] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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29
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Izquierdo J, Pericàs MA. A Recyclable, Immobilized Analogue of Benzotetramisole for Catalytic Enantioselective Domino Michael Addition/Cyclization Reactions in Batch and Flow. ACS Catal 2015. [DOI: 10.1021/acscatal.5b02121] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Javier Izquierdo
- Institute
of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Avinguda Paı̈sos Catalans 16, 43007 Tarragona, Spain
| | - Miquel A. Pericàs
- Institute
of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Avinguda Paı̈sos Catalans 16, 43007 Tarragona, Spain
- Departament
de Quı́mica Orgànica, Universitat de Barcelona (UB), 08028 Barcelona, Spain
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30
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Yen WP, Liu PL, Uramaru N, Lin HY, Wong FF. Indium(III) chloride/silica gel catalyzed synthesis of pyrazolo[3,4- b ]pyrrolo[3,4- d ]pyridines. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.09.042] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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31
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Shushizadeh MR, Mostoufi A, Behfar AA, Heidary M. 1,7-Sigmatropic rearrangement in 1,2-dihydro and 1,2,3,4-tetrahydroquinoline synthesis using marine sponge/H2C2O4 as a catalyst. ARAB J CHEM 2015. [DOI: 10.1016/j.arabjc.2012.06.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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32
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Hao X, Lin L, Tan F, Yin C, Liu X, Feng X. Ligand Control of Diastereodivergency in Asymmetric Inverse Electron Demand Diels–Alder Reaction. ACS Catal 2015. [DOI: 10.1021/acscatal.5b01719] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Xiaoyu Hao
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, People’s Republic of China
- Collaborative Innovation Center
of Chemical
Science and Engineering, Tianjin, People’s Republic of China
| | - Lili Lin
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, People’s Republic of China
- Collaborative Innovation Center
of Chemical
Science and Engineering, Tianjin, People’s Republic of China
| | - Fei Tan
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, People’s Republic of China
- Collaborative Innovation Center
of Chemical
Science and Engineering, Tianjin, People’s Republic of China
| | - Chengkai Yin
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, People’s Republic of China
- Collaborative Innovation Center
of Chemical
Science and Engineering, Tianjin, People’s Republic of China
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, People’s Republic of China
- Collaborative Innovation Center
of Chemical
Science and Engineering, Tianjin, People’s Republic of China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, People’s Republic of China
- Collaborative Innovation Center
of Chemical
Science and Engineering, Tianjin, People’s Republic of China
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33
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Sha F, Tao Y, Tang CY, Zhang F, Wu XY. Construction of Benzo[c]carbazoles and Their Antitumor Derivatives through the Diels–Alder Reaction of 2-Alkenylindoles and Arynes. J Org Chem 2015. [DOI: 10.1021/acs.joc.5b01223] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Feng Sha
- Key Lab for Advanced Materials
and Institute of Fine Chemicals, East China University of Science and Technology, Meilong Road 130, Shanghai 200237, People’s Republic of China
| | - Yuan Tao
- Key Lab for Advanced Materials
and Institute of Fine Chemicals, East China University of Science and Technology, Meilong Road 130, Shanghai 200237, People’s Republic of China
| | - Chen-Yu Tang
- Key Lab for Advanced Materials
and Institute of Fine Chemicals, East China University of Science and Technology, Meilong Road 130, Shanghai 200237, People’s Republic of China
| | - Fei Zhang
- Key Lab for Advanced Materials
and Institute of Fine Chemicals, East China University of Science and Technology, Meilong Road 130, Shanghai 200237, People’s Republic of China
| | - Xin-Yan Wu
- Key Lab for Advanced Materials
and Institute of Fine Chemicals, East China University of Science and Technology, Meilong Road 130, Shanghai 200237, People’s Republic of China
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34
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Thermal reactions involving 1-azadienes and allenic esters-(II):1a reactions of 3-(N-aryliminomethyl)chromones with allenic esters-tandem reorganization of [2+2] cycloadducts to novel compounds. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.06.058] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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35
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Simal C, Bates RH, Ureña M, Giménez I, Koutsou C, Infantes L, Fernández de la Pradilla R, Viso A. Synthesis of Enantiopure 3-Hydroxypiperidines from Sulfinyl Dienyl Amines by Diastereoselective Intramolecular Cyclization and [2,3]-Sigmatropic Rearrangement. J Org Chem 2015; 80:7674-92. [PMID: 26162504 DOI: 10.1021/acs.joc.5b01307] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The highly diastereoselective base-promoted intramolecular cyclization of a variety of enantiopure sulfinyl dienyl amines provides novel sulfinyl tetrahydropyridines that are readily converted to 3-hydroxy tetrahydropyridines via sigmatropic rearrangement. The influence of N- and C- substituents on the process has been studied. Procedures to shorten the sequence such as the tandem cyclization followed by [2,3]-sigmatropic rearrangement, as well as cyclization of the free amine, under Boc- or ArSO- deprotection conditions have been examined. Good to excellent levels of selectivity are generally observed for the reported transformations (dr: 75/25 to >98/2). A novel protocol to access substituted amino dienyl sulfoxides is also reported.
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Affiliation(s)
- Carmen Simal
- †Instituto de Química Orgánica General, IQOG-CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
| | - Robert H Bates
- †Instituto de Química Orgánica General, IQOG-CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
| | - Mercedes Ureña
- †Instituto de Química Orgánica General, IQOG-CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
| | - Irene Giménez
- †Instituto de Química Orgánica General, IQOG-CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
| | - Christina Koutsou
- †Instituto de Química Orgánica General, IQOG-CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
| | - Lourdes Infantes
- ‡Instituto de Química Física Rocasolano, IQFR-CSIC, Serrano 119, 28006 Madrid, Spain
| | | | - Alma Viso
- †Instituto de Química Orgánica General, IQOG-CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
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36
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Christmann M, Hu J, Kitamura M, Stoltz B. Tetrahedron reports on organic chemistry. Tetrahedron 2015. [DOI: 10.1016/s0040-4020(15)00744-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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37
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Cheng M, Liu JK, Tong X, Tian P. Amine-promoted asymmetric [4+2] cycloadditions of α-acetoxymethyl allenoate and dual activated alkenes: stereoselective synthesis of poly-substituted cyclohexenes. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.04.099] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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38
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Chu JCK, Dalton DM, Rovis T. Zn-catalyzed enantio- and diastereoselective formal [4 + 2] cycloaddition involving two electron-deficient partners: asymmetric synthesis of piperidines from 1-azadienes and nitro-alkenes. J Am Chem Soc 2015; 137:4445-52. [PMID: 25821893 DOI: 10.1021/jacs.5b00033] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
We report a catalytic asymmetric synthesis of piperidines through [4 + 2] cycloaddition of 1-azadienes and nitro-alkenes. The reaction uses earth abundant Zn as catalyst and is highly diastereo- and regioselective. A novel BOPA ligand (F-BOPA) confers high reactivity and enantioselectivity in the process. The presence of ortho substitution on the arenes adjacent to the bis(oxazolines) was found to be particularly impactful, due to limiting the undesired coordination of 1-azadiene to the Lewis acid and thus allowing the reaction to be carried out at lower temperature. A series of secondary kinetic isotope effect studies using a range of ligands implicates a stepwise mechanism for the transformation, involving an initial Michael-type addition of the imine to the nitro-alkene followed by a cyclization event. The stepwise mechanism obviates the electronic requirement inherent to a concerted mechanism, explaining the successful cycloaddition between two electron-deficient partners.
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Affiliation(s)
- John C K Chu
- Department of Chemistry, Colorado State University, Ft. Collins, Colorado 80523, United States
| | - Derek M Dalton
- Department of Chemistry, Colorado State University, Ft. Collins, Colorado 80523, United States
| | - Tomislav Rovis
- Department of Chemistry, Colorado State University, Ft. Collins, Colorado 80523, United States
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39
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Yang G, Jia Q, Chen L, Du Z, Wang J. Direct access to pyrimidines through organocatalytic inverse-electron-demand Diels–Alder reaction of ketones with 1,3,5-triazine. RSC Adv 2015. [DOI: 10.1039/c5ra16995j] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An organocatalytic inverse-electron-demand Diels–Alder reaction of ketones with 1,3,5-triazine through enamine catalysis has been developed.
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Affiliation(s)
- Gongming Yang
- Allan H. Conney Laboratory for Anticancer Research
- Guangdong University of Technology
- China
| | - Qianfa Jia
- Allan H. Conney Laboratory for Anticancer Research
- Guangdong University of Technology
- China
| | - Lei Chen
- Allan H. Conney Laboratory for Anticancer Research
- Guangdong University of Technology
- China
| | - Zhiyun Du
- Allan H. Conney Laboratory for Anticancer Research
- Guangdong University of Technology
- China
| | - Jian Wang
- Allan H. Conney Laboratory for Anticancer Research
- Guangdong University of Technology
- China
- Department of Chemistry
- National University of Singapore
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40
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41
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Bernal-Albert P, Faustino H, Gimeno A, Asensio G, Mascareñas JL, López F. Gold(I)-catalyzed intermolecular cycloaddition of allenamides with α,β-unsaturated hydrazones: efficient access to highly substituted cyclobutanes. Org Lett 2014; 16:6196-9. [PMID: 25406491 PMCID: PMC4304836 DOI: 10.1021/ol503121q] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
α,β-Unsaturated N,N-dialkyl hydrazones undergo a mild [2 + 2] cycloaddition to allenamides when treated with a suitable gold catalyst. The method, which represents the first application of N,N-dialkyl hydrazones in gold catalysis, is compatible with a wide variety of substituents at the alkenyl moiety of the hydrazone component, proceeds with excellent levels of regio- and diastereoselectivity, and provides densely substituted cyclobutanes with good to excellent yields.
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Affiliation(s)
- Paloma Bernal-Albert
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica, Universidad de Santiago de Compostela , 15782, Santiago de Compostela, Spain
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42
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Tao Y, Zhang F, Tang CY, Wu XY, Sha F. Direct Assembly of Benzo[a]carbazole-5-carboxylates via a Diels-Alder Reaction with Arynes and 3-Alkenylindoles. ASIAN J ORG CHEM 2014. [DOI: 10.1002/ajoc.201402152] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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43
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Neely JM, Rovis T. Pyridine synthesis by [4 + 2] cycloadditions of 1-azadienes: hetero-Diels Alder and transition metal-catalysed approaches. Org Chem Front 2014. [DOI: 10.1039/c4qo00187g] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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44
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Gu J, Ma C, Li QZ, Du W, Chen YC. β,γ-Regioselective Inverse-Electron-Demand Aza-Diels–Alder Reactions with α,β-Unsaturated Aldehydes via Dienamine Catalysis. Org Lett 2014; 16:3986-9. [PMID: 25046480 DOI: 10.1021/ol501814p] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Jing Gu
- Key
Laboratory of Drug-Targeting and Drug Delivery System of the Ministry
of Education, West China School of Pharmacy, and State Key Laboratory
of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Chao Ma
- Key
Laboratory of Drug-Targeting and Drug Delivery System of the Ministry
of Education, West China School of Pharmacy, and State Key Laboratory
of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Qing-Zhu Li
- Key
Laboratory of Drug-Targeting and Drug Delivery System of the Ministry
of Education, West China School of Pharmacy, and State Key Laboratory
of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Wei Du
- Key
Laboratory of Drug-Targeting and Drug Delivery System of the Ministry
of Education, West China School of Pharmacy, and State Key Laboratory
of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Ying-Chun Chen
- Key
Laboratory of Drug-Targeting and Drug Delivery System of the Ministry
of Education, West China School of Pharmacy, and State Key Laboratory
of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
- College
of Pharmacy, Third Military Medical University, Shapingba, Chongqing 400038, China
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45
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Belskaya NP, Gavlik KD, Naumenkova PO, Slepukhin PA. Reaction of arylhydrazonoacetamidines with carbonyl compounds. Novel synthetic route to 2,3-dihydro-1,2,4-triazines. Russ Chem Bull 2014. [DOI: 10.1007/s11172-014-0638-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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46
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Hassam M, More SV, Li WS. Synthesis of nitrogen-containing benzoannulated eight- and nine-membered heterocycles from methyl 4-amino-3-iodobenzoate. MENDELEEV COMMUNICATIONS 2014. [DOI: 10.1016/j.mencom.2014.04.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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47
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Kobayashi S, Kudo K, Ito A, Hirama S, Otani T, Saito T. The diene-transmissive hetero-Diels–Alder reaction of 2-vinyl α,β-unsaturated aldimines: stereoselective synthesis of hexahydroquinazolin-2-ones. Org Biomol Chem 2014; 12:4061-4. [DOI: 10.1039/c4ob00224e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The tandem Diels–Alder methodology of cross-conjugated 1-azatrienes for synthesis of crossed bis-cycloadducts with high chemo-, regio- and stereoselectivities is described.
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Affiliation(s)
- Satoru Kobayashi
- Department of Chemistry
- Faculty of Science
- Tokyo University of Science
- Tokyo 162-8601, Japan
| | - Kenji Kudo
- Department of Chemistry
- Faculty of Science
- Tokyo University of Science
- Tokyo 162-8601, Japan
| | - Ai Ito
- Department of Chemistry
- Faculty of Science
- Tokyo University of Science
- Tokyo 162-8601, Japan
| | - Satoru Hirama
- Department of Chemistry
- Faculty of Science
- Tokyo University of Science
- Tokyo 162-8601, Japan
| | - Takashi Otani
- Department of Chemistry
- Faculty of Science
- Tokyo University of Science
- Tokyo 162-8601, Japan
| | - Takao Saito
- Department of Chemistry
- Faculty of Science
- Tokyo University of Science
- Tokyo 162-8601, Japan
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48
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Ma C, Gu J, Teng B, Zhou QQ, Li R, Chen YC. 1-Azadienes as regio- and chemoselective dienophiles in aminocatalytic asymmetric Diels-Alder reaction. Org Lett 2013; 15:6206-9. [PMID: 24215629 DOI: 10.1021/ol4030474] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Electron-deficient 1-aza-1,3-butadienes containing a 1,2-benzoisothiazole-1,1-dioxide or 1,2,3-benzoxathiazine-2,2-dioxide motif act as regio- and chemoselective dienophiles in normal-electron-demand Diels-Alder reactions with HOMO-raised trienamines, rather than typical 4π-participation in inverse-electron-demand versions. The enantioenriched cycloadducts could be efficiently converted to spiro or fused frameworks with high structural and stereogenic complexity by a sequential aza-benzoin reaction or other transformations.
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Affiliation(s)
- Chao Ma
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education, West China School of Pharmacy, and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University , Chengdu, Sichuan 610041, China, and College of Pharmacy, Third Military Medical University , Shapingba, Chongqing 400038, China
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49
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Feng X, Zhou Z, Ma C, Yin X, Li R, Dong L, Chen YC. Trienamines Derived from Interrupted Cyclic 2,5-Dienones: Remote δ,ε-CC Bond Activation for Asymmetric Inverse-Electron-Demand Aza-Diels-Alder Reaction. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201307460] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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50
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Feng X, Zhou Z, Ma C, Yin X, Li R, Dong L, Chen YC. Trienamines Derived from Interrupted Cyclic 2,5-Dienones: Remote δ,ε-CC Bond Activation for Asymmetric Inverse-Electron-Demand Aza-Diels-Alder Reaction. Angew Chem Int Ed Engl 2013; 52:14173-6. [DOI: 10.1002/anie.201307460] [Citation(s) in RCA: 107] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2013] [Revised: 09/24/2013] [Indexed: 12/25/2022]
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