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Mendas I, Gastaldi S, Suppo JS. Strategies for Accessing cis-1-Amino-2-Indanol. Molecules 2024; 29:2442. [PMID: 38893318 PMCID: PMC11173559 DOI: 10.3390/molecules29112442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2024] [Revised: 05/14/2024] [Accepted: 05/15/2024] [Indexed: 06/21/2024] Open
Abstract
cis-1-amino-2-indanol is an important building block in many areas of chemistry. Indeed, this molecule is currently used as skeleton in many ligands (BOX, PyBOX…), catalysts and chiral auxiliaries. Moreover, it has been incorporated in numerous bioactive structures. The major issues during its synthesis are the control of cis-selectivity, for which various strategies have been devised, and the enantioselectivity of the reaction. This review highlights the various methodologies implemented over the last few decades to access cis-1-amino-2-indanol in racemic and enantioselective manners. In addition, the various substitution patterns on the aromatic ring and their preparations are listed.
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2
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Serdaroğlu G, Uludağ N. Structural, electronic, and spectroscopic study on 1,5-methanoazocino[4,3-b]indole synthesized by TFB-based route. CHEMICAL PAPERS 2021. [DOI: 10.1007/s11696-021-01683-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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3
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Tanaka K, Vong K. The Journey to In Vivo Synthetic Chemistry: From Azaelectrocyclization to Artificial Metalloenzymes. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2020. [DOI: 10.1246/bcsj.20200180] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Katsunori Tanaka
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8552, Japan
- Biofunctional Synthetic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, Wako, Saitama 351-0198, Japan
- Biofunctional Chemistry Laboratory, A. Butlerov Institute of Chemistry, Kazan Federal University, Kazan 420008, Russia
- GlycoTargeting Research Laboratory, RIKEN Baton Zone Program, Wako, Saitama 351-0198, Japan
| | - Kenward Vong
- Biofunctional Synthetic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, Wako, Saitama 351-0198, Japan
- GlycoTargeting Research Laboratory, RIKEN Baton Zone Program, Wako, Saitama 351-0198, Japan
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4
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Bankura A, Naskar S, Roy Chowdhury S, Maity R, Mishra S, Das I. C
3
‐Thioester/‐Ester Substituted Linear Dienones: A Pluripotent Molecular Platform for Diversification via Cascade Pericyclic Reactions. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000362] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Abhijit Bankura
- Organic and Medicinal Chemistry DivisionCSIR-Indian Institute of Chemical Biology 4, Raja S. C. Mullick Road, Jadavpur Kolkata 700 032 India
| | - Sandip Naskar
- Organic and Medicinal Chemistry DivisionCSIR-Indian Institute of Chemical Biology 4, Raja S. C. Mullick Road, Jadavpur Kolkata 700 032 India
| | - Sabyasachi Roy Chowdhury
- Department of ChemistryIndian Institute of Technology Kharagpur Kharagpur West Bengal 721 302 India
| | - Rajib Maity
- Organic and Medicinal Chemistry DivisionCSIR-Indian Institute of Chemical Biology 4, Raja S. C. Mullick Road, Jadavpur Kolkata 700 032 India
| | - Sabyashachi Mishra
- Department of ChemistryIndian Institute of Technology Kharagpur Kharagpur West Bengal 721 302 India
| | - Indrajit Das
- Organic and Medicinal Chemistry DivisionCSIR-Indian Institute of Chemical Biology 4, Raja S. C. Mullick Road, Jadavpur Kolkata 700 032 India
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5
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Sun Y, Wang X, Shen G, Yang T, Yang Y, Li J, Yang M, Sun H, Wei J. A 6π Azaelectrocyclization Strategy towards the 1,5,9‐Triazacoronenes. Adv Synth Catal 2020. [DOI: 10.1002/adsc.201901433] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Yi‐Xun Sun
- School of Chemistry and Materials Science, Key Laboratory for Macromolecular Science of Shaanxi ProvinceShaanxi Normal University Xi'an 710062 People's Republic of China
| | - Xiao‐Gang Wang
- School of Chemistry and Materials Science, Key Laboratory for Macromolecular Science of Shaanxi ProvinceShaanxi Normal University Xi'an 710062 People's Republic of China
| | - Guo‐Dong Shen
- School of Chemistry and Materials Science, Key Laboratory for Macromolecular Science of Shaanxi ProvinceShaanxi Normal University Xi'an 710062 People's Republic of China
| | - Tian Yang
- School of Chemistry and Materials Science, Key Laboratory for Macromolecular Science of Shaanxi ProvinceShaanxi Normal University Xi'an 710062 People's Republic of China
| | - Yi‐Hui Yang
- School of Chemistry and Materials Science, Key Laboratory for Macromolecular Science of Shaanxi ProvinceShaanxi Normal University Xi'an 710062 People's Republic of China
| | - Jing Li
- School of Chemistry and Materials Science, Key Laboratory for Macromolecular Science of Shaanxi ProvinceShaanxi Normal University Xi'an 710062 People's Republic of China
| | - Ming‐Yu Yang
- School of Chemistry and Materials Science, Key Laboratory for Macromolecular Science of Shaanxi ProvinceShaanxi Normal University Xi'an 710062 People's Republic of China
| | - Hua‐Ming Sun
- School of Chemistry and Materials Science, Key Laboratory for Macromolecular Science of Shaanxi ProvinceShaanxi Normal University Xi'an 710062 People's Republic of China
| | - Jun‐Fa Wei
- School of Chemistry and Materials Science, Key Laboratory for Macromolecular Science of Shaanxi ProvinceShaanxi Normal University Xi'an 710062 People's Republic of China
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6
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Hugelshofer CL, Palani V, Sarpong R. Calyciphylline B-type Alkaloids: Evolution of a Synthetic Strategy to (−)-Daphlongamine H. J Org Chem 2019; 84:14069-14091. [DOI: 10.1021/acs.joc.9b02223] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Cedric L. Hugelshofer
- Department of Chemistry, University of California Berkeley, Berkeley, California 94720, United States
| | - Vignesh Palani
- Department of Chemistry, University of California Berkeley, Berkeley, California 94720, United States
| | - Richmond Sarpong
- Department of Chemistry, University of California Berkeley, Berkeley, California 94720, United States
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7
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Vargas DF, Larghi EL, Kaufman TS. The 6π-azaelectrocyclization of azatrienes. Synthetic applications in natural products, bioactive heterocycles, and related fields. Nat Prod Rep 2019; 36:354-401. [PMID: 30090891 DOI: 10.1039/c8np00014j] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Covering: 2006 to 2018 The application of the 6π-azaelectrocyclization of azatrienes as a key strategy for the synthesis of natural products, their analogs and related bioactive or biomedically-relevant compounds (from 2006 to date) is comprehensively reviewed. Details about reaction optimization studies, relevant reaction mechanisms and conditions are also discussed.
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Affiliation(s)
- Didier F Vargas
- Instituto de Química Rosario (IQUIR, CONICET-UNR), Facultad de Ciencias Bioquímicas y Farmacéuticas - Universidad Nacional de Rosario, Suipacha 531, 2000 Rosario, Argentina.
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8
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Pang Y, Liang G, Xie F, Hu H, Du C, Zhang X, Cheng M, Lin B, Liu Y. N-Fluorobenzenesulfonimide as a highly effective Ag(i)-catalyst attenuator for tryptamine-derived ynesulfonamide cycloisomerization. Org Biomol Chem 2019; 17:2247-2257. [DOI: 10.1039/c9ob00059c] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
N-Fluorobenzenesulfonimide was identified for the first time as a unique Ag(i)-catalyst attenuator in the annulation of a tryptamine-derived ynesulfonamide to an azepino[4,5-b]indole.
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Affiliation(s)
- Yadong Pang
- Key Laboratory of Structure-Based Drug Design and Discovery Shenyang Pharmaceutical University
- Ministry of Education
- Shenyang 110016
- P. R. China
- Institute of Drug Research in Medicine Capital of China
| | - Guoduan Liang
- Key Laboratory of Structure-Based Drug Design and Discovery Shenyang Pharmaceutical University
- Ministry of Education
- Shenyang 110016
- P. R. China
- Institute of Drug Research in Medicine Capital of China
| | - Fukai Xie
- Key Laboratory of Structure-Based Drug Design and Discovery Shenyang Pharmaceutical University
- Ministry of Education
- Shenyang 110016
- P. R. China
- Institute of Drug Research in Medicine Capital of China
| | - Haibin Hu
- Key Laboratory of Structure-Based Drug Design and Discovery Shenyang Pharmaceutical University
- Ministry of Education
- Shenyang 110016
- P. R. China
- Institute of Drug Research in Medicine Capital of China
| | - Chuan Du
- Key Laboratory of Structure-Based Drug Design and Discovery Shenyang Pharmaceutical University
- Ministry of Education
- Shenyang 110016
- P. R. China
- Institute of Drug Research in Medicine Capital of China
| | - Xinhang Zhang
- Key Laboratory of Structure-Based Drug Design and Discovery Shenyang Pharmaceutical University
- Ministry of Education
- Shenyang 110016
- P. R. China
- Institute of Drug Research in Medicine Capital of China
| | - Maosheng Cheng
- Key Laboratory of Structure-Based Drug Design and Discovery Shenyang Pharmaceutical University
- Ministry of Education
- Shenyang 110016
- P. R. China
- Institute of Drug Research in Medicine Capital of China
| | - Bin Lin
- Key Laboratory of Structure-Based Drug Design and Discovery Shenyang Pharmaceutical University
- Ministry of Education
- Shenyang 110016
- P. R. China
- Institute of Drug Research in Medicine Capital of China
| | - Yongxiang Liu
- Key Laboratory of Structure-Based Drug Design and Discovery Shenyang Pharmaceutical University
- Ministry of Education
- Shenyang 110016
- P. R. China
- Institute of Drug Research in Medicine Capital of China
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9
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Owsianik K, Krawczyk E, Mielniczak G, Koprowski M, Sieroń L. Three-step synthesis of chiral and sterically hindered amino alcohols based on cyclic enol phosphates. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.10.072] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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10
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Takeda T, Harada S, Okabe A, Nishida A. Cyclohepta[ b]indole Synthesis through [5 + 2] Cycloaddition: Bifunctional Indium(III)-Catalyzed Stereoselective Construction of 7-Membered Ring Fused Indoles. J Org Chem 2018; 83:11541-11551. [PMID: 30179462 DOI: 10.1021/acs.joc.8b01407] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A new approach for the synthesis of highly functionalized tetrahydrocyclohepta[ b]indoles through [5 + 2] cycloaddition was developed. Two carbon-carbon bonds were formed by the simple addition of an indium catalyst, which acted as both a π-Lewis acid and σ-Lewis acid to activate the alkyne and unsaturated ester, respectively. The reaction could be applied to various substrates and proceeded regio- and diastereoselectively in all cases.
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Affiliation(s)
- Takuya Takeda
- Graduate School of Pharmaceutical Sciences , Chiba University , 1-8-1 Inohana, Chuo-ku , 263-8522 Chiba , Japan
| | - Shinji Harada
- Graduate School of Pharmaceutical Sciences , Chiba University , 1-8-1 Inohana, Chuo-ku , 263-8522 Chiba , Japan.,Molecular Chirality Research Center , Chiba University , 1-33 Yayoi-cho, Inage-ku , 263-8522 Chiba , Japan
| | - Akito Okabe
- Graduate School of Pharmaceutical Sciences , Chiba University , 1-8-1 Inohana, Chuo-ku , 263-8522 Chiba , Japan
| | - Atsushi Nishida
- Graduate School of Pharmaceutical Sciences , Chiba University , 1-8-1 Inohana, Chuo-ku , 263-8522 Chiba , Japan.,Molecular Chirality Research Center , Chiba University , 1-33 Yayoi-cho, Inage-ku , 263-8522 Chiba , Japan
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11
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Synthesis of Polysubstituted 3-Methylisoquinolines through the 6π-Electron Cyclization/Elimination of 1-Azatrienes derived from 1,1-Dimethylhydrazine. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801076] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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12
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Nedolya NA, Tarasova OA, Albanov AI, Trofimov BA. Controlled synthesis of polyfunctionalized pyrrole and thiophene from the same precursor, methyl [(buta-2,3-dienimidoyl)sulfanyl]acetate. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2017. [DOI: 10.1134/s1070428017070260] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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13
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A One-Pot Three-Component Double-Click Method for Synthesis of [ 67Cu]-Labeled Biomolecular Radiotherapeutics. Sci Rep 2017; 7:1912. [PMID: 28507297 PMCID: PMC5432496 DOI: 10.1038/s41598-017-02123-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Accepted: 04/06/2017] [Indexed: 12/14/2022] Open
Abstract
A one-pot three-component double-click process for preparing tumor-targeting agents for cancer radiotherapy is described here. By utilizing DOTA (or NOTA) containing tetrazines and the TCO-substituted aldehyde, the two click reactions, the tetrazine ligation (an inverse electron-demand Diels-Alder cycloaddition) and the RIKEN click (a rapid 6π-azaelectrocyclization), could simultaneously proceed under mild conditions to afford covalent attachment of the metal chelator DOTA or NOTA to biomolecules such as to albumin and anti-IGSF4 antibody without altering their activities. Subsequently, radiolabeling of DOTA- or NOTA-attached albumin and anti-IGSF4 antibody (an anti-tumor-targeting antibody) with [67Cu], a β−-emitting radionuclide, could be achieved in a highly efficient manner via a simple chelation with DOTA proving to be a more superior chelator than NOTA. Our work provides a new and operationally simple method for introducing the [67Cu] isotope even in large quantities to biomolecules, thereby representing an important process for preparations of clinically relevant tumor-targeting agents for radiotherapy.
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14
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Wang MH, Barsoum D, Schwamb CB, Cohen DT, Goess BC, Riedrich M, Chan A, Maki BE, Mishra RK, Scheidt KA. Catalytic, Enantioselective β-Protonation through a Cooperative Activation Strategy. J Org Chem 2017; 82:4689-4702. [DOI: 10.1021/acs.joc.7b00334] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michael H. Wang
- Department
of Chemistry, Center for Molecular Innovation and Drug Discovery, Northwestern University, Silverman Hall, Evanston, Illinois 60208, United States
| | - David Barsoum
- Department
of Chemistry, Center for Molecular Innovation and Drug Discovery, Northwestern University, Silverman Hall, Evanston, Illinois 60208, United States
| | - C. Benjamin Schwamb
- Department
of Chemistry, Center for Molecular Innovation and Drug Discovery, Northwestern University, Silverman Hall, Evanston, Illinois 60208, United States
| | - Daniel T. Cohen
- Department
of Chemistry, Center for Molecular Innovation and Drug Discovery, Northwestern University, Silverman Hall, Evanston, Illinois 60208, United States
| | - Brian C. Goess
- Department
of Chemistry, Furman University, Greenville, South Carolina 29613, United States
| | - Matthias Riedrich
- Department
of Chemistry, Center for Molecular Innovation and Drug Discovery, Northwestern University, Silverman Hall, Evanston, Illinois 60208, United States
| | - Audrey Chan
- Department
of Chemistry, Center for Molecular Innovation and Drug Discovery, Northwestern University, Silverman Hall, Evanston, Illinois 60208, United States
| | - Brooks E. Maki
- Department
of Chemistry, Center for Molecular Innovation and Drug Discovery, Northwestern University, Silverman Hall, Evanston, Illinois 60208, United States
| | - Rama K. Mishra
- Department
of Chemistry, Center for Molecular Innovation and Drug Discovery, Northwestern University, Silverman Hall, Evanston, Illinois 60208, United States
| | - Karl A. Scheidt
- Department
of Chemistry, Center for Molecular Innovation and Drug Discovery, Northwestern University, Silverman Hall, Evanston, Illinois 60208, United States
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15
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Williams DR, Bawel SA. General Methodology for the Preparation of Unsymmetrical α-Linked Bisenones via Ligandless Cross-Coupling Reactions. Org Lett 2017; 19:1730-1733. [DOI: 10.1021/acs.orglett.7b00497] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- David R. Williams
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405-7102, United States
| | - Seth A. Bawel
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405-7102, United States
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16
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Baillie RA, Patrick BO, Legzdins P, Rosenfeld DC. Functionalization of Methane Initiated by Cp*W(NO)(CH2CMe3)(η3-CH2CHCMe2). Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00738] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Rhett A. Baillie
- Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
| | - Brian O. Patrick
- Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
| | - Peter Legzdins
- Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
| | - Devon C. Rosenfeld
- The Dow Chemical Company, 2301 North Brazosport Boulevard, Freeport, Texas 77541, United States
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18
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Abstract
A Ni-catalyzed cross coupling of arylzinc reagents with pyridinium ions provides enantioenriched dihydropyridines, which are precursors to diverse piperidine derivatives.
We report an enantioselective Ni-catalyzed cross coupling of arylzinc reagents with pyridinium ions formed in situ from pyridine and a chloroformate. This reaction provides enantioenriched 2-aryl-1,2-dihydropyridine products that can be elaborated to numerous piperidine derivatives with little or no loss in ee. This method is notable for its use of pyridine, a feedstock chemical, to build a versatile, chiral heterocycle in a single synthetic step.
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Affiliation(s)
- J Patrick Lutz
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA
| | - Stephen T Chau
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA
| | - Abigail G Doyle
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA
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19
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Pradipta AR, Tsutsui A, Tanaka K. Unrecognized Reactivity of N-Alkyl Unsaturated Imines: Synthetic Application and Biological Functions. J SYN ORG CHEM JPN 2016. [DOI: 10.5059/yukigoseikyokaishi.74.700] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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20
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Patel A, Vella JR, Ma ZX, Hsung RP, Houk KN. Transition State Gauche Effects Control the Torquoselectivities of the Electrocyclizations of Chiral 1-Azatrienes. J Org Chem 2015; 80:11888-94. [PMID: 26435446 PMCID: PMC5555587 DOI: 10.1021/acs.joc.5b02085] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Hsung et al. have reported a series of torquoselective electrocyclizations of chiral 1-azahexa-1E,3Z,5E-trienes that yield functionalized dihydropyridines. To understand the origins of the torquoselectivities of these azaelectrocyclizations, we modeled these electrocyclic ring closures using the M06-2X density functional. A new stereochemical model that rationalizes the observed 1,2 stereoinduction emerges from these computations. This model is an improvement and generalization of the "inside-alkoxy" model used to rationalize stereoselectivities of the 1,3-dipolar cycloaddition of chiral allyl ethers and emphasizes a stabilizing hyperconjugative effect, which we have termed a transition state gauche effect. This stereoelectronic effect controls the conformational preferences at the electrocyclization transition states, and only in one of the allowed disrotatory electrocyclization transition states is the ideal stereoelectronic arrangement achieved without the introduction of a steric clash. Computational experiments confirm the role of this effect as a stereodeterminant since substrates with electropositive groups and electronegative groups have different conformational preferences at the transition state and undergo ring closure with divergent stereochemical outcomes. This predicted reversal of stereoselectivity for the ring closures of several silyl substituted azatrienes have been demonstrated experimentally.
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Affiliation(s)
| | | | - Zhi-Xiong Ma
- Division of Pharmaceutical Sciences, School of Pharmacy, and Department of Chemistry, University of Wisconsin , Madison, Wisconsin 53705, United States
| | - R P Hsung
- Division of Pharmaceutical Sciences, School of Pharmacy, and Department of Chemistry, University of Wisconsin , Madison, Wisconsin 53705, United States
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21
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Ogura A, Tanaka K. Azaelectrocyclization on cell surface: convenient and general approach to chemical biology research. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.02.063] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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22
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Ma ZX, Patel A, Houk KN, Hsung RP. Highly torquoselective electrocyclizations and competing 1,7-hydrogen shifts of 1-azatrienes with silyl substitution at the allylic carbon. Org Lett 2015; 17:2138-41. [PMID: 25859907 DOI: 10.1021/acs.orglett.5b00727] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Highly torquoselective electrocyclizations of chiral 1-azatrienes are described. These 1-azatrienes contain an allylic stereocenter that is substituted with a silyl group and are derived in situ from condensation of γ-silyl-substituted enals with vinylogous amides. The ensuing stereoselective ring closures are part of a tandem sequence that constitutes an aza-[3 + 3] annulation method for constructing 1,2-dihydropyridines. Several mechanisms for the formal 1,7-hydrogen shift of these 1-azatrienes were evaluated computationally.
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Affiliation(s)
- Zhi-Xiong Ma
- †Division of Pharmaceutical Sciences, School of Pharmacy, and Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53705, United States
| | - Ashay Patel
- ‡Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - K N Houk
- ‡Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Richard P Hsung
- †Division of Pharmaceutical Sciences, School of Pharmacy, and Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53705, United States
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23
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Resende DI, Guieu S, Oliva CG, Silva AM. Synthesis of 2,6-diaryl-1,2-dihydropyridines through a 6π-electrocyclization of N-sulfonylazatrienes. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.10.034] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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24
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Tanaka K, Kitadani M, Tsutsui A, Pradipta AR, Imamaki R, Kitazume S, Taniguchi N, Fukase K. A cascading reaction sequence involving ligand-directed azaelectrocyclization and autooxidation-induced fluorescence recovery enables visualization of target proteins on the surfaces of live cells. Org Biomol Chem 2014; 12:1412-8. [PMID: 24435553 DOI: 10.1039/c3ob42267d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A general probe designed to induce a cascading sequence of reactions on a target protein was efficiently synthesized. The cascading reaction sequence involved (i) ligand-directed azaelectrocyclization with lysine and (ii) the autooxidation-induced release of a fluorescence quencher from the labeled protein. The probe was linked to a cyclic RGDyK peptide to enable the selective visualization of integrin αVβ3 on the surfaces of live cells.
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Affiliation(s)
- Katsunori Tanaka
- Biofunctional Synthetic Chemistry Laboratory, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan.
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Tanaka K, Fukase K. Chemical Approach to a Whole Body Imaging of Sialo-N-Linked Glycans. Top Curr Chem (Cham) 2014; 367:201-30. [PMID: 25971916 DOI: 10.1007/128_2014_603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
PET and noninvasive fluorescence imaging of the sialo-N-linked glycan derivatives are described. To establish the efficient labeling protocol for N-glycans and/or glycoconjugates, new labeling probes of fluorescence and ⁶⁸Ga-DOTA, as the positron emission nucleus for PET, through rapid 6π-azaelectrocyclization were designed and synthesized, (E)-ester aldehydes. The high reactivity of these probes enabled the labeling of lysine residues in peptides, proteins, and even amino groups on the cell surfaces at very low concentrations of the target molecules (~10⁻⁸ M) within a short reaction time (~5 min) to result in "selective" and "non-destructive" labeling of the more accessible amines. The first MicroPET of glycoproteins, ⁶⁸Ga-DOTA-orosomucoid and asialoorosomucoid, successfully visualized the differences in the circulatory residence of glycoproteins, in the presence or absence of sialic acids. In vivo dynamics of the new N-glycoclusters, prepared by the "self-activating" Huisgen cycloaddition reaction, could also be affected significantly by their partial structures at the non-reducing end, i.e., the presence or absence of sialic acids, and/or sialoside linkages to galactose. Azaelectrocyclization chemistry is also applicable to the engineering of the proteins and/or the cell surfaces by the oligosaccharides; lymphocytes chemically engineered by sialo-N-glycan successfully target the tumor implanted in BALB/C nude mice, detected by noninvasive fluorescence imaging.
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Affiliation(s)
- Katsunori Tanaka
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka, 560-0043, Japan,
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Shao Y, Zhu K, Qin Z, Li E, Li Y. Lewis Acid-Catalyzed Cyclization of Enaminones with Propargylic Alcohols: Regioselective Synthesis of Multisubstituted 1,2-Dihydropyridines. J Org Chem 2013; 78:5731-6. [DOI: 10.1021/jo4005553] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yushang Shao
- Shanghai Key Laboratory of Green Chemistry and Chemical
Processes, Department of Chemistry, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, People’s
Republic of China
| | - Kai Zhu
- Shanghai Key Laboratory of Green Chemistry and Chemical
Processes, Department of Chemistry, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, People’s
Republic of China
| | - Zhengchen Qin
- Shanghai Key Laboratory of Green Chemistry and Chemical
Processes, Department of Chemistry, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, People’s
Republic of China
| | - Ende Li
- Shanghai Key Laboratory of Green Chemistry and Chemical
Processes, Department of Chemistry, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, People’s
Republic of China
| | - Yanzhong Li
- Shanghai Key Laboratory of Green Chemistry and Chemical
Processes, Department of Chemistry, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, People’s
Republic of China
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Tanaka K, Moriwaki K, Yokoi S, Koyama K, Miyoshi E, Fukase K. Whole-body imaging of tumor cells by azaelectrocyclization: Visualization of metastasis dependence on glycan structure. Bioorg Med Chem 2013; 21:1074-7. [DOI: 10.1016/j.bmc.2013.01.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2012] [Revised: 01/03/2013] [Accepted: 01/04/2013] [Indexed: 12/29/2022]
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28
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Tanaka K, Nakamoto Y, Siwu ERO, Pradipta AR, Morimoto K, Fujiwara T, Yoshida S, Hosoya T, Tamura Y, Hirai G, Sodeoka M, Fukase K. Development of bis-unsaturated ester aldehydes as amino-glue probes: sequential double azaelectrocyclization as a promising strategy for bioconjugation. Org Biomol Chem 2013; 11:7326-33. [DOI: 10.1039/c3ob41507d] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Katsumura S, Kobayashi T, Sakaguchi T. One-Pot Asymmetric 6π-Azaelectrocyclization as a New Strategy for Alkaloid Synthesis. HETEROCYCLES 2013. [DOI: 10.3987/rev-12-761] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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30
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Tanaka K, Siwu ER, Hirosaki S, Iwata T, Matsumoto R, Kitagawa Y, Pradipta AR, Okumura M, Fukase K. Efficient synthesis of 2,6,9-triazabicyclo[3.3.1]nonanes through amine-mediated formal [4+4] reaction of unsaturated imines. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.08.081] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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31
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Martin RM, Bergman RG, Ellman JA. Synthesis of pyridines from ketoximes and terminal alkynes via C-H bond functionalization. J Org Chem 2012; 77:2501-7. [PMID: 22332639 PMCID: PMC3292635 DOI: 10.1021/jo202280e] [Citation(s) in RCA: 132] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
An expedient one-pot rhodium catalyzed C-H bond functionalization/electrocyclization/dehydration procedure has been developed for the synthesis of highly substituted pyridine derivatives from terminal alkynes and α,β-unsaturated ketoximes. The use of electron-deficient phosphite ligands is important to suppress dimerization of the terminal alkynes to enynes.
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Affiliation(s)
- Rhia M Martin
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, USA
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Kobayashi T, Hasegawa F, Hirose Y, Tanaka K, Mori H, Katsumura S. Stereocontrolled Synthesis of Substituted Chiral Piperidines viaOne-Pot Asymmetric 6π-Azaelectrocyclization: Asymmetric Syntheses of(−)-Dendroprimine, (+)-7-Epidendroprimine, (+)-5-Epidendroprimine, and (+)-5,7-Epidendroprimine. J Org Chem 2012; 77:1812-32. [DOI: 10.1021/jo202350z] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Toyoharu Kobayashi
- School of Science and Technology, Kwansei Gakuin University, Gakuen 2-1, Sanda, Hyogo 669-1337, Japan.
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New type of azacyclization: thermal preparation of 4,6-disubstituted 2-piperidinone from N-sulfonyldienamide and its substituent effect. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2011.12.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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34
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Trofimov BA, Mal’kina AG, Nosyreva VV, Shemyakina OA, Albanov AI, Afonin AV, Kazheva ON, Alexandrov GG, Dyachenko OA. Tandem regio- and stereospecific cyclization of ethyl isonicotinate with cyanoacetylenic alcohols to provide novel polycondensed heterocyclic systems. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2011.12.035] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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35
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Ramírez MA, Cuadro AM, Alvarez-Builla J, Castaño O, Andrés JL, Mendicuti F, Clays K, Asselberghs I, Vaquero JJ. Donor-(π-bridge)-azinium as D-π-A+ one-dimensional and D-π-A(+)-π-D multidimensional V-shaped chromophores. Org Biomol Chem 2012; 10:1659-69. [PMID: 22241523 DOI: 10.1039/c2ob06427h] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Heteroaromatic cations reacted with N-heteroarylacetylenes under Sonogashira conditions to allow easy access to potential single donor D-π-A(+) and V-shaped D-π-A(+)-π-D chromophores, where the acceptor moiety A is the π-deficient pyridinium cation and the donor moiety is represented by different π-excessive N-heterocycles. The β hyperpolarizabilities were measured using hyper-Rayleigh scattering experiments and the experimental data are supported by a theoretical analysis that combines a variety of computational procedures, including Density Functional Theory (DFT) and correlated Hartree-Fock-based methods (RCIS(D)).
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Affiliation(s)
- Marco Antonio Ramírez
- Departamento de Química Orgánica, Universidad de Alcalá, 28871 Alcalá de Henares, Madrid, Spain
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Tanaka K, Fukase K. Development of Azaelectrocyclization-Based Labeling and Application to Noninvasive Imaging and Targeting Using N-Glycan Derivatives—In Pursuit of N-Glycan Functions on Proteins, Dendrimers, and Living Cells—. TRENDS GLYCOSCI GLYC 2012. [DOI: 10.4052/tigg.24.47] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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37
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Tanaka K, Yokoi S, Morimoto K, Iwata T, Nakamoto Y, Nakayama K, Koyama K, Fujiwara T, Fukase K. Cell surface biotinylation by azaelectrocyclization: easy-handling and versatile approach for living cell labeling. Bioorg Med Chem 2011; 20:1865-8. [PMID: 22257530 DOI: 10.1016/j.bmc.2011.12.043] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2011] [Revised: 12/07/2011] [Accepted: 12/20/2011] [Indexed: 01/21/2023]
Abstract
Versatile method for living cell labeling has been established. Cell surfaces are initially biotinylated by azaelectrocyclization, and then treated with the fluorescence-labeled avidin or the anti-biotin antibody.
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Affiliation(s)
- Katsunori Tanaka
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka-shi, Osaka 560-0043, Japan
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38
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Discovery and application of 6π-azaelectrocyclization to natural product synthesis and synthetic biology. Sci China Chem 2011. [DOI: 10.1007/s11426-011-4466-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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39
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Xu H, Wolf C. Asymmetric synthesis of chiral 1,3-diaminopropanols: bisoxazolidine-catalyzed C-C bond formation with α-keto amides. Angew Chem Int Ed Engl 2011; 50:12249-52. [PMID: 22038682 DOI: 10.1002/anie.201105778] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2011] [Revised: 10/17/2011] [Indexed: 11/08/2022]
Affiliation(s)
- Hanhui Xu
- Department of Chemistry, Georgetown University, 37th and O Streets, Washington, DC 20057, USA
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40
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Xu H, Wolf C. Asymmetric Synthesis of Chiral 1,3-Diaminopropanols: Bisoxazolidine-Catalyzed CC Bond Formation with α-Keto Amides. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201105778] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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41
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Buchanan GS, Dai H, Hsung RP, Gerasyuto AI, Scheinebeck CM. Asymmetric aza-[3+3] annulation in the synthesis of indolizidines: an unexpected reversal of regiochemistry. Org Lett 2011; 13:4402-5. [PMID: 21786757 PMCID: PMC3155627 DOI: 10.1021/ol2017438] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An enantioselective and diastereoselective aza-[3+3] annulation of pyrrolidine-based exo-cyclic vinylogous amides and urethanes with chiral vinyl iminium salts is described. This asymmetric annulation manifold is possible because of an unexpected regiochemical reversal whereby head-to-tail annulations dominated over the predicted head-to-head. It should find prevalent synthetic applications in the enantioselective synthesis of indolizidines.
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Affiliation(s)
- Grant S. Buchanan
- Division of Pharmaceutical Sciences and Department of Chemistry, University of Wisconsin, Madison, WI 53705
| | - Huifang Dai
- Division of Pharmaceutical Sciences and Department of Chemistry, University of Wisconsin, Madison, WI 53705
| | - Richard P. Hsung
- Division of Pharmaceutical Sciences and Department of Chemistry, University of Wisconsin, Madison, WI 53705
| | - Aleksey I. Gerasyuto
- Division of Pharmaceutical Sciences and Department of Chemistry, University of Wisconsin, Madison, WI 53705
| | - Casi M. Scheinebeck
- Division of Pharmaceutical Sciences and Department of Chemistry, University of Wisconsin, Madison, WI 53705
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42
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Sakaguchi T, Okuno Y, Tsutsumi Y, Tsuchikawa H, Katsumura S. [1,5]-H Shift of Aldehyde Hydrogen in Dienal Compounds to Produce Ketenes. Org Lett 2011; 13:4292-5. [DOI: 10.1021/ol2016302] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Taku Sakaguchi
- School of Science and Technology, Kwansei Gakuin University, Gakuen 2-1, Sanda, Hyogo 669-1337, Japan
| | - Yudai Okuno
- School of Science and Technology, Kwansei Gakuin University, Gakuen 2-1, Sanda, Hyogo 669-1337, Japan
| | - Yohei Tsutsumi
- School of Science and Technology, Kwansei Gakuin University, Gakuen 2-1, Sanda, Hyogo 669-1337, Japan
| | - Hiroshi Tsuchikawa
- School of Science and Technology, Kwansei Gakuin University, Gakuen 2-1, Sanda, Hyogo 669-1337, Japan
| | - Shigeo Katsumura
- School of Science and Technology, Kwansei Gakuin University, Gakuen 2-1, Sanda, Hyogo 669-1337, Japan
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43
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Tanaka K, Kitadani M, Fukase K. Target-selective fluorescent "switch-on" protein labeling by 6π-azaelectrocyclization. Org Biomol Chem 2011; 9:5346-9. [PMID: 21691664 DOI: 10.1039/c1ob05320e] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Application of azaelectrocyclization and FRET techniques to lysine groups enabled the selective and sensitive detection of a target protein from a mixture, with high fluorescence contrast.
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Affiliation(s)
- Katsunori Tanaka
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka-shi, Osaka 560-0043, Japan.
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44
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Monbaliu JCM, Masschelein KGR, Stevens CV. Electron-deficient 1- and 2-azabuta-1,3-dienes: a comprehensive survey of their synthesis and reactivity. Chem Soc Rev 2011; 40:4708-39. [PMID: 21655551 DOI: 10.1039/c1cs15070g] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Electron-deficient 1- and 2-azabuta-1,3-dienes are reagents intrinsically able to provide a wide range of cyclic and acyclic N-containing building blocks. Depending on their substitution, they behave as dienes for Diels-Alder reactions, as partners for [4+1], [3+2], [2+2]-cycloadditions, for aziridinations and as electrophiles for 1,2 and 1,4-additions. Nowadays, they are a very versatile family of compounds, despite their usual instability and complex reactivity. Four decades of research in this challenging area are reviewed in this critical review: their synthetic aspects and their reactivity towards a wide range of dienophiles, dipoles and nucleophiles are described as well. The introduction focuses on their electronic properties in order to get a clear picture of their reactivity (190 references).
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Affiliation(s)
- Jean-Christophe M Monbaliu
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000 Gent, Belgium
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Abstract
This critical review offers an overview of asymmetric electrocyclic processes, where diastereo- or enantioselectivity is a consequence of the influence of a chiral component (be it substrate or catalyst) on the electrocyclic bond-forming process (195 references).
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Affiliation(s)
- Sam Thompson
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, UK
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46
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Ungureanu S, Meadows M, Smith J, Duff DB, Burgess JM, Goess BC. Total Synthesis of (±)-Hibiscone C. Tetrahedron Lett 2011; 52:1509-1511. [PMID: 24771951 DOI: 10.1016/j.tetlet.2011.01.111] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
A total synthesis of (±)- hibiscone C, one member of the furanosteroid family of natural products that also includes viridin and wortmannin, is reported. Two new pathways for formation of the key diacyl furan subunit are described.
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Affiliation(s)
- Sinziana Ungureanu
- Furman University, Department of Chemistry, 3300 Poinsett Highway, Greenville, South Carolina 29613, USA
| | - Maggie Meadows
- Furman University, Department of Chemistry, 3300 Poinsett Highway, Greenville, South Carolina 29613, USA
| | - Joel Smith
- Furman University, Department of Chemistry, 3300 Poinsett Highway, Greenville, South Carolina 29613, USA
| | - David B Duff
- Furman University, Department of Chemistry, 3300 Poinsett Highway, Greenville, South Carolina 29613, USA
| | - James M Burgess
- Furman University, Department of Chemistry, 3300 Poinsett Highway, Greenville, South Carolina 29613, USA
| | - Brian C Goess
- Furman University, Department of Chemistry, 3300 Poinsett Highway, Greenville, South Carolina 29613, USA
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47
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Tanaka K. Exploring A Unique Reactivity of 6π-Azaelectrocyclization: Discovery and Application to Natural Products Synthesis and Synthetic Chemical Biology. J SYN ORG CHEM JPN 2011. [DOI: 10.5059/yukigoseikyokaishi.69.1389] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Katsunori Tanaka
- Department of Chemistry, Graduate School of Science, Osaka University
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48
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Sakaguchi T, Kobayashi S, Katsumura S. Total synthesis of (−)-20-epiuleinevia stereocontrolled one-pot asymmetric azaelectrocyclization followed by novel 1,4-addition reaction. Org Biomol Chem 2011; 9:257-64. [DOI: 10.1039/c0ob00627k] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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49
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Patir S, Ertürk E. An Entry to the Azocino[4,3-b]indole Framework through a Dehydrogenative Activation of 1,2,3,4-Tetrahydrocarbazoles Mediated by DDQ: Formal Synthesis of (±)-Uleine. J Org Chem 2010; 76:335-8. [DOI: 10.1021/jo1021663] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Süleyman Patir
- Department of Chemistry Education, Faculty of Education, Hacettepe University, 06800 Beytepe, Ankara, Turkey
| | - Erkan Ertürk
- Chemistry Institute, TUBITAK Marmara Research Center, 41470 Gebze, Kocaeli, Turkey
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Sanz R, Miguel D, Martínez A, Gohain M, García-García P, Fernández-Rodríguez MA, Álvarez E, Rodríguez F. Brønsted Acid Catalyzed Alkylation of Indoles with Tertiary Propargylic Alcohols: Scope and Limitations. European J Org Chem 2010. [DOI: 10.1002/ejoc.201001055] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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