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Chugunova E, Gazizov AS, Islamov D, Matveeva V, Burilov A, Akylbekov N, Dobrynin A, Zhapparbergenov R, Appazov N, Chabuka BK, Christopher K, Tonkoglazova DI, Alabugin IV. An Unusual Rearrangement of Pyrazole Nitrene and Coarctate Ring-Opening/Recyclization Cascade: Formal CH-Acetoxylation and Azide/Amine Conversion without External Oxidants and Reductants. Molecules 2023; 28:7335. [PMID: 37959754 PMCID: PMC10648078 DOI: 10.3390/molecules28217335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Revised: 10/20/2023] [Accepted: 10/26/2023] [Indexed: 11/15/2023] Open
Abstract
We report an unusual transformation where the transient formation of a nitrene moiety initiates a sequence of steps leading to remote oxidative C-H functionalization (R-CH3 to R-CH2OC(O)R') and the concomitant reduction of the nitrene into an amino group. No external oxidants or reductants are needed for this formal molecular comproportionation. Detected and isolated intermediates and computational analysis suggest that the process occurs with pyrazole ring opening and recyclization.
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Affiliation(s)
- Elena Chugunova
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Akad. Arbuzov St. 8, Kazan 420088, Russia; (A.S.G.); (D.I.); (V.M.); (A.B.); (A.D.); (I.V.A.)
| | - Almir S. Gazizov
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Akad. Arbuzov St. 8, Kazan 420088, Russia; (A.S.G.); (D.I.); (V.M.); (A.B.); (A.D.); (I.V.A.)
| | - Daut Islamov
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Akad. Arbuzov St. 8, Kazan 420088, Russia; (A.S.G.); (D.I.); (V.M.); (A.B.); (A.D.); (I.V.A.)
| | - Victoria Matveeva
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Akad. Arbuzov St. 8, Kazan 420088, Russia; (A.S.G.); (D.I.); (V.M.); (A.B.); (A.D.); (I.V.A.)
| | - Alexander Burilov
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Akad. Arbuzov St. 8, Kazan 420088, Russia; (A.S.G.); (D.I.); (V.M.); (A.B.); (A.D.); (I.V.A.)
| | - Nurgali Akylbekov
- Laboratory of Engineering Profile “Physical and Chemical Methods of Analysis”, Korkyt Ata Kyzylorda University, Aitekebie Str. 29A, Kyzylorda 120014, Kazakhstan; (N.A.); (R.Z.)
| | - Alexey Dobrynin
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Akad. Arbuzov St. 8, Kazan 420088, Russia; (A.S.G.); (D.I.); (V.M.); (A.B.); (A.D.); (I.V.A.)
| | - Rakhmetulla Zhapparbergenov
- Laboratory of Engineering Profile “Physical and Chemical Methods of Analysis”, Korkyt Ata Kyzylorda University, Aitekebie Str. 29A, Kyzylorda 120014, Kazakhstan; (N.A.); (R.Z.)
| | - Nurbol Appazov
- Laboratory of Engineering Profile “Physical and Chemical Methods of Analysis”, Korkyt Ata Kyzylorda University, Aitekebie Str. 29A, Kyzylorda 120014, Kazakhstan; (N.A.); (R.Z.)
- Zhakhaev Kazakh Scientific Research Institute of Rice Growing, Abay Av. 25B, Kyzylorda 120008, Kazakhstan
| | - Beauty K. Chabuka
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, Tallahassee, FL 32306-3290, USA; (B.K.C.); (K.C.); (D.I.T.)
| | - Kimberley Christopher
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, Tallahassee, FL 32306-3290, USA; (B.K.C.); (K.C.); (D.I.T.)
| | - Daria I. Tonkoglazova
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, Tallahassee, FL 32306-3290, USA; (B.K.C.); (K.C.); (D.I.T.)
| | - Igor V. Alabugin
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Akad. Arbuzov St. 8, Kazan 420088, Russia; (A.S.G.); (D.I.); (V.M.); (A.B.); (A.D.); (I.V.A.)
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, Tallahassee, FL 32306-3290, USA; (B.K.C.); (K.C.); (D.I.T.)
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2
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do Carmo Pinheiro R, Back DF, Müller SG, Nogueira CW, Zeni G. Potassium tert-Butoxide-Promoted Tandem Cyclization of Organoselenium Alkynyl Aryl Propargyl Ethers. J Org Chem 2022; 87:13111-13123. [DOI: 10.1021/acs.joc.2c01598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Roberto do Carmo Pinheiro
- Laboratório de Síntese, Reatividade, Avaliação Farmacológica e Toxicológica de Organocalcogênios CCNE, UFSM, Santa Maria, Rio Grande do Sul 97105-900, Brazil
| | - Davi F. Back
- Departamento de Química, UFSM, Laboratório de Materiais Inorgânicos, Santa Maria, Rio Grande do Sul 97105-900, Brazil
| | - Sabrina G. Müller
- Laboratório de Síntese, Reatividade, Avaliação Farmacológica e Toxicológica de Organocalcogênios CCNE, UFSM, Santa Maria, Rio Grande do Sul 97105-900, Brazil
| | - Cristina Wayne Nogueira
- Laboratório de Síntese, Reatividade, Avaliação Farmacológica e Toxicológica de Organocalcogênios CCNE, UFSM, Santa Maria, Rio Grande do Sul 97105-900, Brazil
| | - Gilson Zeni
- Laboratório de Síntese, Reatividade, Avaliação Farmacológica e Toxicológica de Organocalcogênios CCNE, UFSM, Santa Maria, Rio Grande do Sul 97105-900, Brazil
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3
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Danilkina NA, Govdi AI, Khlebnikov AF, Tikhomirov AO, Sharoyko VV, Shtyrov AA, Ryazantsev MN, Bräse S, Balova IA. Heterocycloalkynes Fused to a Heterocyclic Core: Searching for an Island with Optimal Stability-Reactivity Balance. J Am Chem Soc 2021; 143:16519-16537. [PMID: 34582682 DOI: 10.1021/jacs.1c06041] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
In the search for fundamentally new, active, stable, and readily synthetically accessible cycloalkynes as strain-promoted azide-alkyne cycloaddition (SPAAC) reagents for bioorthogonal bioconjugation, we integrated two common approaches: the reagent destabilization by the increase of a ring strain and the transition state stabilization through electronic effects. As a result new SPAAC reagents, heterocyclononynes fused to a heterocyclic core, were created. These compounds can be obtained through a general synthetic route based on four crucial steps: the electrophile-promoted cyclization, Sonogashira coupling, Nicholas reaction, and final deprotection of Co-complexes of cycloalkynes from cobalt. Varying the natures of the heterocycle and heteroatom allows for reaching the optimal stability-reactivity balance for new strained systems. Computational and experimental studies revealed similar SPAAC reactivities for stable 9-membered isocoumarin- and benzothiophene-fused heterocycloalkynes and their unstable 8-membered homologues. We discovered that close reactivity is a result of the interplay of two electronic effects, which stabilize SPAAC transition states (πin* → σ* and π* → πin*) with structural effects such as conformational changes from eclipsed to staggered conformations in the cycloalkyne scaffold, that noticeably impact alkyne bending and reactivity. The concerted influence of a heterocycle and a heteroatom on the polarization of a triple bond in highly strained cycles along with a low HOMO-LUMO gap was assumed to be the reason for the unpredictable kinetic instability of all the cyclooctynes and the benzothiophene-fused oxacyclononyne. The applicability of stable isocoumarin-fused azacyclononyne IC9N-BDP-FL for in vitro bioconjugation was exemplified by labeling and visualization of HEK293 cells carrying azido-DNA and azido-glycans.
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Affiliation(s)
- Natalia A Danilkina
- Institute of Chemistry, Saint Petersburg State University (SPbU), Universitetskaya nab. 7/9, 199034 Saint Petersburg, Russia
| | - Anastasia I Govdi
- Institute of Chemistry, Saint Petersburg State University (SPbU), Universitetskaya nab. 7/9, 199034 Saint Petersburg, Russia
| | - Alexander F Khlebnikov
- Institute of Chemistry, Saint Petersburg State University (SPbU), Universitetskaya nab. 7/9, 199034 Saint Petersburg, Russia
| | - Alexander O Tikhomirov
- Institute of Chemistry, Saint Petersburg State University (SPbU), Universitetskaya nab. 7/9, 199034 Saint Petersburg, Russia
| | - Vladimir V Sharoyko
- Institute of Chemistry, Saint Petersburg State University (SPbU), Universitetskaya nab. 7/9, 199034 Saint Petersburg, Russia
| | - Andrey A Shtyrov
- Nanotechnology Research and Education Centre RAS, Saint Petersburg Academic University, 8/3 Khlopina Street, 194021 Saint Petersburg, Russia
| | - Mikhail N Ryazantsev
- Institute of Chemistry, Saint Petersburg State University (SPbU), Universitetskaya nab. 7/9, 199034 Saint Petersburg, Russia
| | - Stefan Bräse
- Institute of Organic Chemistry (IOC), Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany.,Institute of Biological and Chemical Systems-Functional Molecular Systems (IBCS-FMS), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Irina A Balova
- Institute of Chemistry, Saint Petersburg State University (SPbU), Universitetskaya nab. 7/9, 199034 Saint Petersburg, Russia
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Fillmore B, Price J, Dean R, Brown AA, Decken A, Eisler S. Accessing the Ene-Imine Motif in 1 H-Isoindole, Thienopyrrole, and Thienopyridine Building Blocks. ACS OMEGA 2020; 5:22914-22925. [PMID: 32954140 PMCID: PMC7495751 DOI: 10.1021/acsomega.0c02282] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 08/20/2020] [Indexed: 06/11/2023]
Abstract
A pathway to a range of diverse heterocycles was developed using a nucleophilic cyclization strategy. Lactams and ene-imines are accessed in a few steps from a common precursor, and these moieties are further elaborated to directly provide pyrroles or pyridines with extended conjugation. Reaction conditions are mild, and a broad range of structural types are available within a few steps.
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5
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Sadanandan S, Gupta DK. Changing stereoselectivity and regioselectivity in copper( i)-catalyzed 5- exo cyclization by chelation and rigidity in aminoalkyl radicals: synthesis towards diverse bioactive N-heterocycles. NEW J CHEM 2020. [DOI: 10.1039/c9nj05166j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Chelation, rigidity and carbon-radical positions in aminoalkyl precursors disturb the usual 2,4-trans diastereoselectivity and 5-exo mode in Cu(i)-catalyzed ATRC.
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6
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Alkynes as Synthetic Equivalents of Ketones and Aldehydes: A Hidden Entry into Carbonyl Chemistry. Molecules 2019; 24:molecules24061036. [PMID: 30875972 PMCID: PMC6471418 DOI: 10.3390/molecules24061036] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 03/08/2019] [Accepted: 03/11/2019] [Indexed: 11/16/2022] Open
Abstract
The high energy packed in alkyne functional group makes alkyne reactions highly thermodynamically favorable and generally irreversible. Furthermore, the presence of two orthogonal π-bonds that can be manipulated separately enables flexible synthetic cascades stemming from alkynes. Behind these "obvious" traits, there are other more subtle, often concealed aspects of this functional group's appeal. This review is focused on yet another interesting but underappreciated alkyne feature: the fact that the CC alkyne unit has the same oxidation state as the -CH2C(O)- unit of a typical carbonyl compound. Thus, "classic carbonyl chemistry" can be accessed through alkynes, and new transformations can be engineered by unmasking the hidden carbonyl nature of alkynes. The goal of this review is to illustrate the advantages of using alkynes as an entry point to carbonyl reactions while highlighting reports from the literature where, sometimes without full appreciation, the concept of using alkynes as a hidden entry into carbonyl chemistry has been applied.
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7
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Fiser B, Cuerva JM, Gómez-Bengoa E. Baldwin-Type Rules for Metal-Controlled Intramolecular Migratory Insertions. A Computational Study of Ni, Pd, and Pt Case. Organometallics 2018. [DOI: 10.1021/acs.organomet.7b00812] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Béla Fiser
- Department
of Organic Chemistry I, University of the Basque Country (UPV-EHU), Donostia−San
Sebastián, 20018, Spain
- Institute
of Chemistry, University of Miskolc, Miskolc-Egyetemváros, 3515, Hungary
- Ferenc
Rákóczi II, Transcarpathian Hungarian Institute, Beregszász,
Transcarpathia, 90200, Ukraine
| | - Juan M. Cuerva
- Department
of Organic Chemistry, University of Granada, Granada, 18071, Spain
| | - Enrique Gómez-Bengoa
- Department
of Organic Chemistry I, University of the Basque Country (UPV-EHU), Donostia−San
Sebastián, 20018, Spain
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8
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Infante G, Eisler S. Accessing pyrrolones and pyridinones: controlling 5-exo and 6-endo ring closures in heterocyclic alkynylamides. CAN J CHEM 2017. [DOI: 10.1139/cjc-2016-0524] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Competitive 5-exo and 6-endo anionic intramolecular cyclization reactions in heterocyclic alkynylamides were explored via experimental and computational analysis. The 5-exo-dig cyclization pathway is usually disfavoured in heterocyclic systems, and 6-endo products are often both the kinetic and thermodynamic products. However, we’ve found that it is possible to shift selectivity toward the 5-exo-dig pyrrolone products away from the less strained pyridinone products that are produced via the 6-endo-dig cyclization. Parameters such as identity of heteroatom, heteroatom positioning within the heterocycle, and functionality on the alkyne were investigated and, in many cases, were found to strongly influence product ratios. A series of computational studies was performed to provide further insight into the 5-exo-dig and 6-endo-dig pathways in these heterocyclic systems. Theoretical predictions were found to reproduce experimental results, highlighting the predictive capabilities of the computations in determining preferred products.
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Affiliation(s)
- Genesis Infante
- Department of Chemistry, F.J. Toole Hall, University of New Brunswick — Fredericton, Fredericton, NB E3B 5A3, Canada
- Department of Chemistry, F.J. Toole Hall, University of New Brunswick — Fredericton, Fredericton, NB E3B 5A3, Canada
| | - Sara Eisler
- Department of Chemistry, F.J. Toole Hall, University of New Brunswick — Fredericton, Fredericton, NB E3B 5A3, Canada
- Department of Chemistry, F.J. Toole Hall, University of New Brunswick — Fredericton, Fredericton, NB E3B 5A3, Canada
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9
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Recchi AMS, Back DF, Zeni G. Sequential Carbon–Carbon/Carbon–Selenium Bond Formation Mediated by Iron(III) Chloride and Diorganyl Diselenides: Synthesis and Reactivity of 2-Organoselenyl-Naphthalenes. J Org Chem 2017; 82:2713-2723. [DOI: 10.1021/acs.joc.7b00050] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Ana M. S. Recchi
- Laboratório
de Síntese, Reatividade, Avaliação
Farmacológica e Toxicológica de Organocalcogênios and ‡Laboratório
de Materiais Inorgânicos, CCNE, UFSM, Santa Maria, Rio Grande
do Sul 97105-900, Brazil
| | - Davi F. Back
- Laboratório
de Síntese, Reatividade, Avaliação
Farmacológica e Toxicológica de Organocalcogênios and ‡Laboratório
de Materiais Inorgânicos, CCNE, UFSM, Santa Maria, Rio Grande
do Sul 97105-900, Brazil
| | - Gilson Zeni
- Laboratório
de Síntese, Reatividade, Avaliação
Farmacológica e Toxicológica de Organocalcogênios and ‡Laboratório
de Materiais Inorgânicos, CCNE, UFSM, Santa Maria, Rio Grande
do Sul 97105-900, Brazil
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Gomes GDP, Evoniuk CJ, Ly M, Alabugin IV. Changing the path of least resistance, or access to endo-dig products via a sequence of three exo-trig transition states: electronic effects in homoallyic ring expansion cascades of alkenyl isonitriles. Org Biomol Chem 2017; 15:4135-4143. [DOI: 10.1039/c7ob00527j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Substituent effects reshape the potential energy surfaces for radical homoallylic expansion/fragmentation cascades that transform alkenyl isonitriles into N-heteroaromatics
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Affiliation(s)
| | | | - Michelle Ly
- Department of Chemistry and Biochemistry
- Florida State University
- Tallahassee
- USA
| | - Igor V. Alabugin
- Department of Chemistry and Biochemistry
- Florida State University
- Tallahassee
- USA
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Goutham K, Kadiyala V, Sridhar B, Karunakar GV. Gold-catalyzed intramolecular cyclization/condensation sequence: synthesis of 1,2-dihydro[c][2,7]naphthyridines. Org Biomol Chem 2017; 15:7813-7818. [DOI: 10.1039/c7ob01285c] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
An efficient gold-catalyzed protocol for the construction of 1,2-dihydro[c][2,7]naphthyridines from 2-aminophenyl prop-2-yn-1-yl enaminones has been developed. In this organic transformation new C–C and C–N bonds were formedvia6-endo-dig cyclization and good to excellent yields were obtained in one-pot synthesis.
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Affiliation(s)
- Kommuru Goutham
- Crop Protection Chemicals Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad
- India
- Academy of Scientific and Innovative Research
| | - Veerabhushanam Kadiyala
- Crop Protection Chemicals Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad
- India
- Academy of Scientific and Innovative Research
| | | | - Galla V. Karunakar
- Crop Protection Chemicals Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad
- India
- Academy of Scientific and Innovative Research
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12
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Prochnow T, Back DF, Zeni G. Iron(III) Chloride and Diorganyl Diselenide-Promoted Nucleophilic Closures of 1-Benzyl-2-alkynylbenzenes in the Preparation of 9-(Organoselanyl)-5H-benzo[7]annulenes. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201501055] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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13
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Jin S, Jiang C, Peng X, Shan C, Cui S, Niu Y, Liu Y, Lan Y, Liu Y, Cheng M. Gold(I)-Catalyzed Angle Strain Controlled Strategy to Furopyran Derivatives from Propargyl Vinyl Ethers: Insight into the Regioselectivity of Cycloisomerization. Org Lett 2016; 18:680-3. [DOI: 10.1021/acs.orglett.5b03641] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Shengfei Jin
- 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, Benxi 117000, P. R. China
| | - Chongguo Jiang
- 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, Benxi 117000, P. R. China
| | - Xiaoshi Peng
- 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, Benxi 117000, P. R. China
| | - Chunhui Shan
- School
of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400030, P. R. China
| | - Shanshan Cui
- 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, Benxi 117000, P. R. China
| | - Yuanyuan Niu
- 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, Benxi 117000, P. R. China
| | - Yang 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, Benxi 117000, P. R. China
| | - Yu Lan
- School
of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400030, P. R. 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, Benxi 117000, P. R. 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, Benxi 117000, P. R. China
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14
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Gai R, Back DF, Zeni G. Potassium tert-Butoxide-Catalyzed Synthesis of Benzofuroazepines via Cyclization of (2-Alkynylbenzyl)oxy Nitriles. J Org Chem 2015; 80:10278-87. [DOI: 10.1021/acs.joc.5b01884] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Rafaela Gai
- Laboratório
de Síntese, Reatividade, Avaliação
Farmacológica e Toxicológica de Organocalcogênios and ‡Laboratório
de Materiais Inorgânicos, CCNE, UFSM, Santa Maria, Rio Grande
do Sul 97105-900, Brazil
| | - Davi F. Back
- Laboratório
de Síntese, Reatividade, Avaliação
Farmacológica e Toxicológica de Organocalcogênios and ‡Laboratório
de Materiais Inorgânicos, CCNE, UFSM, Santa Maria, Rio Grande
do Sul 97105-900, Brazil
| | - Gilson Zeni
- Laboratório
de Síntese, Reatividade, Avaliação
Farmacológica e Toxicológica de Organocalcogênios and ‡Laboratório
de Materiais Inorgânicos, CCNE, UFSM, Santa Maria, Rio Grande
do Sul 97105-900, Brazil
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15
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Mohamed RK, Mondal S, Gold B, Evoniuk CJ, Banerjee T, Hanson K, Alabugin IV. Alkenes as Alkyne Equivalents in Radical Cascades Terminated by Fragmentations: Overcoming Stereoelectronic Restrictions on Ring Expansions for the Preparation of Expanded Polyaromatics. J Am Chem Soc 2015; 137:6335-49. [DOI: 10.1021/jacs.5b02373] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Rana K. Mohamed
- Florida State University, Tallahassee, Florida 32306, United States
| | - Sayantan Mondal
- Florida State University, Tallahassee, Florida 32306, United States
| | - Brian Gold
- Florida State University, Tallahassee, Florida 32306, United States
| | | | - Tanmay Banerjee
- Florida State University, Tallahassee, Florida 32306, United States
| | - Kenneth Hanson
- Florida State University, Tallahassee, Florida 32306, United States
| | - Igor V. Alabugin
- Florida State University, Tallahassee, Florida 32306, United States
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16
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Mondal S, Gold B, Mohamed RK, Phan H, Alabugin IV. Rerouting Radical Cascades: Intercepting the Homoallyl Ring Expansion in Enyne Cyclizations via C–S Scission. J Org Chem 2014; 79:7491-501. [DOI: 10.1021/jo5012043] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Sayantan Mondal
- Department
of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Brian Gold
- Department
of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Rana K. Mohamed
- Department
of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Hoa Phan
- Department
of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Igor V. Alabugin
- Department
of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
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17
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Gulevskaya AV, Tyaglivy AS, Pozharskii AF, Nelina-Nemtseva JI, Steglenko DV. Heterocyclization of Enediynes Promoted by Sodium Azide: A Case of Ambiguity of X-ray Data and Structure Revision. Org Lett 2014; 16:1582-5. [DOI: 10.1021/ol500125j] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Anna V. Gulevskaya
- Department of Organic Chemistry, Southern Federal University, Zorge 7, Rostov-on-Don 344090, Russian Federation
| | - Alexander S. Tyaglivy
- Department of Organic Chemistry, Southern Federal University, Zorge 7, Rostov-on-Don 344090, Russian Federation
| | - Alexander F. Pozharskii
- Department of Organic Chemistry, Southern Federal University, Zorge 7, Rostov-on-Don 344090, Russian Federation
| | - Julia I. Nelina-Nemtseva
- Department of Organic Chemistry, Southern Federal University, Zorge 7, Rostov-on-Don 344090, Russian Federation
| | - Dmitry V. Steglenko
- Department of Organic Chemistry, Southern Federal University, Zorge 7, Rostov-on-Don 344090, Russian Federation
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18
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Mohamed RK, Peterson PW, Alabugin IV. Concerted Reactions That Produce Diradicals and Zwitterions: Electronic, Steric, Conformational, and Kinetic Control of Cycloaromatization Processes. Chem Rev 2013; 113:7089-129. [DOI: 10.1021/cr4000682] [Citation(s) in RCA: 166] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Rana K. Mohamed
- Department of Chemistry
and Biochemistry, Florida State University, Tallahassee, Florida 32306-4390,
United States
| | - Paul W. Peterson
- Department of Chemistry
and Biochemistry, Florida State University, Tallahassee, Florida 32306-4390,
United States
| | - Igor V. Alabugin
- Department of Chemistry
and Biochemistry, Florida State University, Tallahassee, Florida 32306-4390,
United States
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19
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Vasilevskiy SF, Baranov DS. Heterocyclization of 1- and 2-alkynyl-9,10-anthraquinones: new synthetic and mechanistic aspects. Chem Heterocycl Compd (N Y) 2013. [DOI: 10.1007/s10593-013-1235-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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20
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Gold B, Dudley GB, Alabugin IV. Moderating Strain without Sacrificing Reactivity: Design of Fast and Tunable Noncatalyzed Alkyne–Azide Cycloadditions via Stereoelectronically Controlled Transition State Stabilization. J Am Chem Soc 2013; 135:1558-69. [DOI: 10.1021/ja3114196] [Citation(s) in RCA: 110] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Brian Gold
- Department
of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida, 32306-4390, United States
| | - Gregory B. Dudley
- Department
of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida, 32306-4390, United States
| | - Igor V. Alabugin
- Department
of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida, 32306-4390, United States
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21
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Vidhani DV, Cran JW, Krafft ME, Manoharan M, Alabugin IV. Gold(I)-Catalyzed Claisen Rearrangement of Allenyl Vinyl Ethers: Missing Transition States Revealed through Evolution of Aromaticity, Au(I) as an Oxophilic Lewis Acid, and Lower Energy Barriers from a High Energy Complex. J Org Chem 2012; 78:2059-73. [DOI: 10.1021/jo302152j] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Dinesh V. Vidhani
- Department of Chemistry and
Biochemistry, Florida State University,
Tallahassee, Florida 32306, United States
| | - John W. Cran
- Department of Chemistry and
Biochemistry, Florida State University,
Tallahassee, Florida 32306, United States
| | - Marie E. Krafft
- Department of Chemistry and
Biochemistry, Florida State University,
Tallahassee, Florida 32306, United States
| | - Mariappan Manoharan
- School of Science, Engineering
and Mathematics, Bethune-Cookman University, Daytona Beach, Florida 32114, United States
| | - Igor V. Alabugin
- Department of Chemistry and
Biochemistry, Florida State University,
Tallahassee, Florida 32306, United States
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