1
|
Tasi DA, Czakó G. Benchmark ab initio characterization of the complex potential energy surfaces of the HOO - + CH 3Y [Y = F, Cl, Br, I] reactions. Phys Chem Chem Phys 2024; 26:16048-16059. [PMID: 38779842 DOI: 10.1039/d4cp01071j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2024]
Abstract
The α-effect is a well-known phenomenon in organic chemistry, and is related to the enhanced reactivity of nucleophiles involving one or more lone-pair electrons adjacent to the nucleophilic center. The gas-phase bimolecular nucleophilic substitution (SN2) reactions of α-nucleophile HOO- with methyl halides have been thoroughly investigated experimentally and theoretically; however, these investigations have mainly focused on identifying and characterizing the α-effect of HOO-. Here, we perform the first comprehensive high-level ab initio mapping for the HOO- + CH3Y [Y = F, Cl, Br and I] reactions utilizing the modern explicitly-correlated CCSD(T)-F12b method with the aug-cc-pVnZ [n = 2-4] basis sets. The present ab initio characterization considers five distinct product channels of SN2: (CH3OOH + Y-), proton abstraction (CH2Y- + H2O2), peroxide ion substitution (CH3OO- + HY), SN2-induced elimination (CH2O + HY + HO-) and SN2-induced rearrangement (CH2(OH)O- + HY). Moreover, besides the traditional back-side attack Walden inversion, the pathways of front-side attack, double inversion and halogen-bond complex formation have also been explored for SN2. With regard to the Walden inversion of HOO- + CH3Cl, the previously unaddressed discrepancies concerning the geometry of the corresponding transition state are clarified. For the HOO- + CH3F reaction, the recently identified SN2-induced elimination is found to be more exothermic than the SN2 channel, submerged by ∼36 kcal mol-1. The accuracy of our high-level ab initio calculations performed in the present study is validated by the fact that our new benchmark 0 K reaction enthalpies show excellent agreement with the experimental data in nearly all cases.
Collapse
Affiliation(s)
- Domonkos A Tasi
- MTA-SZTE Lendület Computational Reaction Dynamics Research Group, Interdisciplinary Excellence Centre and Department of Physical Chemistry and Materials Science, Institute of Chemistry, University of Szeged, Rerrich Béla tér 1, Szeged H-6720, Hungary.
| | - Gábor Czakó
- MTA-SZTE Lendület Computational Reaction Dynamics Research Group, Interdisciplinary Excellence Centre and Department of Physical Chemistry and Materials Science, Institute of Chemistry, University of Szeged, Rerrich Béla tér 1, Szeged H-6720, Hungary.
| |
Collapse
|
2
|
Wall BJ, VanVeller B. Anomeric Answer to Sulfenamide Stability and α-Nucleophilicity. J Org Chem 2023; 88:15067-15072. [PMID: 37873923 DOI: 10.1021/acs.joc.3c01520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2023]
Abstract
The S-N bond remains a synthetically challenging motif for organic chemists to access. The problem arises from instability in many sulfenamide derivatives, which has led to fewer S-N bond surrogate molecules compared to their hydroxylamine (NH2OH) and hydrazine (NH2NH2) analogues. In turn, sulfenamides have often been omitted in studies regarding α-nucleophilicity. Herein, we provide factors responsible for the stability of the sulfenamide motif and provide new insights on the nucleophilic properties of sulfenamides as they relate to the α-effect.
Collapse
Affiliation(s)
- Brendan J Wall
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| | - Brett VanVeller
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| |
Collapse
|
3
|
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.
Collapse
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.)
| |
Collapse
|
4
|
Yaremenko IA, Belyakova YY, Radulov PS, Medvedev MG, Krivoshchapov NV, Alabugin IV, Terent'ev AO. Two-Component versus Three-Component Condensations in the Race between Hydrazide, Triketone, and Hydrogen Peroxide-How do All Six Reactive Centers Cooperate to Incorporate the Most Diverse Set of Heteroatomic Bridges in a Tricyclic Frame? J Org Chem 2023; 88:13782-13795. [PMID: 37724879 DOI: 10.1021/acs.joc.3c01415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/21/2023]
Abstract
Relief of stereoelectronic frustration drives the acid-catalyzed three-component condensation of β,δ'-triketones with hydrazides and H2O2 to the direction where both nucleophiles and all three electrophilic carbons are involved in the formation of a tricyclic sp3-rich ring system that includes four heteroatoms. The otherwise inaccessible tricyclic N-substituted aminoperoxides are prepared rapidly and selectively from relatively simple substrates in good to high yields.
Collapse
Affiliation(s)
- Ivan A Yaremenko
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prosp., Moscow 119991, Russian Federation
| | - Yulia Yu Belyakova
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prosp., Moscow 119991, Russian Federation
| | - Peter S Radulov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prosp., Moscow 119991, Russian Federation
| | - Michael G Medvedev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prosp., Moscow 119991, Russian Federation
- HSE University, Myasnitskaya Street 20, Moscow 101000, Russian Federation
| | - Nikolai V Krivoshchapov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prosp., Moscow 119991, Russian Federation
| | - Igor V Alabugin
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Alexander O Terent'ev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prosp., Moscow 119991, Russian Federation
| |
Collapse
|
5
|
Amado PSM, Lopes S, Brás EM, Paixão JA, Takano MA, Abe M, Fausto R, Cristiano MLS. Molecular and Crystal Structure, Spectroscopy, and Photochemistry of a Dispiro Compound Bearing the Tetraoxane Pharmacophore. Chemistry 2023; 29:e202301315. [PMID: 37343198 DOI: 10.1002/chem.202301315] [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: 04/26/2023] [Revised: 06/09/2023] [Accepted: 06/13/2023] [Indexed: 06/23/2023]
Abstract
The molecular structure and photochemistry of dispiro[cyclohexane-1,3'-[1,2,4,5]tetraoxane-6',2''-tricyclo[3.3.1.13,7 ]decan]-4-one (TX), an antiparasitic 1,2,4,5-tetraoxane was investigated using matrix isolation IR and EPR spectroscopies, together with quantum chemical calculations undertaken at the DFT(B3LYP)/6-311++G(3df,3pd) level of theory, with and without Grimme's dispersion correction. Photolysis of the matrix-isolated TX, induced by in situ broadband (λ>235 nm) or narrowband (λ in the range 220-263 nm) irradiation, led to new bands in the infrared spectrum that could be ascribed to two distinct photoproducts, oxepane-2,5-dione, and 4-oxohomoadamantan-5-one. Our studies show that these photoproducts result from initial photoinduced cleavage of an O-O bond, with the formation of an oxygen-centered diradical that regioselectivity rearranges to a more stable (secondary carbon-centered)/(oxygen-centered) diradical, yielding the final products. Formation of the diradical species was confirmed by EPR measurements, upon photolysis of the compound at λ=266 nm, in acetonitrile ice (T=10-80 K). Single-crystal X-ray diffraction (XRD) studies demonstrated that the TX molecule adopts nearly the same conformation in the crystal and matrix-isolation conditions, revealing that the intermolecular interactions in the TX crystal are weak. This result is in keeping with observed similarities between the infrared spectrum of the crystalline material and that of matrix-isolated TX. The detailed structural, vibrational, and photochemical data reported here appear relevant to the practical uses of TX in medicinal chemistry, considering its efficient and broad parasiticidal properties.
Collapse
Affiliation(s)
- Patrícia S M Amado
- Center of Marine Sciences, CCMAR, Gambelas Campus, University of Algarve UAlg, 8005-139, Faro, Portugal
- Department of Chemistry and Pharmacy Faculty of Sciences and Technology, Gambelas Campus, University of Algarve UAlg, 8005-139, Faro, Portugal
| | - Susy Lopes
- CQC-IMS, Department of Chemistry, University of Coimbra, 3004-535, Coimbra, Portugal
| | - Elisa M Brás
- CQC-IMS, Department of Chemistry, University of Coimbra, 3004-535, Coimbra, Portugal
| | - José A Paixão
- CFisUC, Department of Physics, University of Coimbra, 3004-516, Coimbra, Portugal
| | - Ma-Aya Takano
- Department of Chemistry Graduate School of Advanced Science and Engineering, Hiroshima University Higashi-Hiroshima, Hiroshima, 739-8526, Japan
- International Institute for Sustainability with Knotted Chiral Meta Matter (SKCM2) Higashi-Hiroshima, Hiroshima, 739-0046, Japan
| | - Manabu Abe
- Department of Chemistry Graduate School of Advanced Science and Engineering, Hiroshima University Higashi-Hiroshima, Hiroshima, 739-8526, Japan
- International Institute for Sustainability with Knotted Chiral Meta Matter (SKCM2) Higashi-Hiroshima, Hiroshima, 739-0046, Japan
| | - Rui Fausto
- CQC-IMS, Department of Chemistry, University of Coimbra, 3004-535, Coimbra, Portugal
- Faculty of Sciences and Letters, Department of Physics, Istanbul Kultur University Ataköy Campus, Bakirköy, 34156, Istanbul, Turkey
| | - Maria L S Cristiano
- Center of Marine Sciences, CCMAR, Gambelas Campus, University of Algarve UAlg, 8005-139, Faro, Portugal
- Department of Chemistry and Pharmacy Faculty of Sciences and Technology, Gambelas Campus, University of Algarve UAlg, 8005-139, Faro, Portugal
| |
Collapse
|
6
|
Saltiel J, Krishnan SB, Gupta S, Chakraborty A, Hilinski EF, Lin X. Photochemistry and Photophysics of Cholesta-5,7,9(11)-trien-3β-ol in Ethanol. Molecules 2023; 28:molecules28104086. [PMID: 37241827 DOI: 10.3390/molecules28104086] [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: 04/21/2023] [Revised: 05/08/2023] [Accepted: 05/09/2023] [Indexed: 05/28/2023] Open
Abstract
Cholesta-5,7,9(11)-trien-3β-ol (9,11-dehydroprovitamin D3, CTL) is used as a fluorescent probe to track the presence and migration of cholesterol in vivo. We recently described the photochemistry and photophysics of CTL in degassed and air-saturated tetrahydrofuran (THF) solution, an aprotic solvent. The zwitterionic nature of the singlet excited state, 1CTL* is revealed in ethanol, a protic solvent. In ethanol, the products observed in THF are accompanied by ether photoadducts and by photoreduction of the triene moiety to four dienes, including provitamin D3. The major diene retains the conjugated s-trans-diene chromophore and the minor is unconjugated, involving 1,4-addition of H at the 7 and 11 positions. In the presence of air, peroxide formation is a major reaction channel as in THF. X-ray crystallography confirmed the identification of two of the new diene products as well as of a peroxide rearrangement product.
Collapse
Affiliation(s)
- Jack Saltiel
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL 32306-4390, USA
| | - Sumesh B Krishnan
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL 32306-4390, USA
| | - Shipra Gupta
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL 32306-4390, USA
| | - Anjan Chakraborty
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL 32306-4390, USA
| | - Edwin F Hilinski
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL 32306-4390, USA
| | - Xinsong Lin
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL 32306-4390, USA
| |
Collapse
|
7
|
Tikhomolova AS, Grinev VS, Yegorova AY. One-Pot Synthesis, E-/Z-Equilibrium in Solution of 3-Hetarylaminomethylidenefuran-2(3 H)-ones and the Way to Selective Synthesis of the E-Enamines. Molecules 2023; 28:molecules28030963. [PMID: 36770633 PMCID: PMC9921198 DOI: 10.3390/molecules28030963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 01/13/2023] [Accepted: 01/15/2023] [Indexed: 01/21/2023] Open
Abstract
We describe a method to synthesize a new class of hetarylaminomethylidene derivatives of furan-2(3H)-ones. The method uses 5-(4-chlorophenyl)furan-2(3H)-one, triethyl orthoformate, and heterocyclic amines with different ring sizes and heteroatoms under refluxing in absolute isopropyl alcohol. The obtained enamines exist in an equilibrium of E- and Z-isomers, whose configurations relative to the double exocyclic C=C bond were confirmed with a set of NMR spectroscopy data. The E-/Z-equilibrium of the synthesized compounds is affected by the configuration of the intermediate, the volume of its substituents, the site of enolate attack, the presence of intramolecular interactions of amino components, the time of the transformation, the order of mixing of the initial reagents, and the use of polar solvents in the NMR experiment. The advantages of the method are that the reaction time is short, the product yield is high, and product purification is easy.
Collapse
Affiliation(s)
- Alexandra S. Tikhomolova
- Institute of Chemistry, N.G. Chernyshevsky Saratov National Research State University, 83 Ulitsa Astrakhanskaya, 410012 Saratov, Russia
- Correspondence:
| | - Vyacheslav S. Grinev
- Institute of Chemistry, N.G. Chernyshevsky Saratov National Research State University, 83 Ulitsa Astrakhanskaya, 410012 Saratov, Russia
- Institute of Biochemistry and Physiology of Plants and Microorganisms—Subdivision of the Federal State Budgetary Research Institution Saratov Federal Scientific Centre of the Russian Academy of Sciences (IBPPM RAS), 13 Prospekt Entuziastov, 410049 Saratov, Russia
| | - Alevtina Yu. Yegorova
- Institute of Chemistry, N.G. Chernyshevsky Saratov National Research State University, 83 Ulitsa Astrakhanskaya, 410012 Saratov, Russia
| |
Collapse
|
8
|
Yaremenko IA, Belyakova YY, Radulov PS, Novikov RA, Medvedev MG, Krivoshchapov NV, Alabugin IV, Terent'ev AO. Cascade Assembly of Bridged N-Substituted Azaozonides: The Counterintuitive Role of Nitrogen Source Nucleophilicity. Org Lett 2022; 24:6582-6587. [PMID: 36070396 DOI: 10.1021/acs.orglett.2c02551] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Counterintuitively, the low basicity of the NH2 group in hydrazides makes them preferred nucleophiles for the synthesis of the N-substituted azaozonides in acid-catalyzed three-component condensation with 1,5-diketones and H2O2. In the case of more basic N sources, e.g., hydrazine and primary amines, such condensation does not occur under these reaction conditions. The method can be applied to a wide range of hydrazides and affords the target bicyclic azaozonides in 27-86% yields.
Collapse
Affiliation(s)
- Ivan A Yaremenko
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prospect, Moscow 119991, Russian Federation
| | - Yulia Yu Belyakova
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prospect, Moscow 119991, Russian Federation
| | - Peter S Radulov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prospect, Moscow 119991, Russian Federation
| | - Roman A Novikov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prospect, Moscow 119991, Russian Federation
| | - Michael G Medvedev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prospect, Moscow 119991, Russian Federation
| | - Nikolai V Krivoshchapov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prospect, Moscow 119991, Russian Federation
| | - Igor V Alabugin
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Alexander O Terent'ev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prospect, Moscow 119991, Russian Federation
| |
Collapse
|
9
|
Perrin CL, Agranat I, Bagno A, Braslavsky SE, Fernandes PA, Gal JF, Lloyd-Jones GC, Mayr H, Murdoch JR, Nudelman NS, Radom L, Rappoport Z, Ruasse MF, Siehl HU, Takeuchi Y, Tidwell TT, Uggerud E, Williams IH. Glossary of terms used in physical organic chemistry (IUPAC Recommendations 2021). PURE APPL CHEM 2022. [DOI: 10.1515/pac-2018-1010] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Abstract
This Glossary contains definitions, explanatory notes, and sources for terms used in physical organic chemistry. Its aim is to provide guidance on the terminology of physical organic chemistry, with a view to achieving a consensus on the meaning and applicability of useful terms and the abandonment of unsatisfactory ones. Owing to the substantial progress in the field, this 2021 revision of the Glossary is much expanded relative to the previous edition, and it includes terms from cognate fields.
Collapse
Affiliation(s)
- Charles L. Perrin
- Department of Chemistry , University of California , San Diego , La Jolla , CA , USA
| | | | - Alessandro Bagno
- University of Padova Faculty of Mathematics Physics and Natural Sciences , Padova , Veneto , Italy
| | - Silvia E. Braslavsky
- Max Planck Institute for Chemical Energy Conversion , Muelheim an der Ruhr , Germany
| | | | | | | | - Herbert Mayr
- Department Chemie , Ludwig-Maximilians-Universität München , München , Germany
| | | | | | - Leo Radom
- School of Chemistry, University of Sydney , Sydney , NSW , Australia
| | - Zvi Rappoport
- Organic Chemistry, The Hebrew University , Jerusalem , Israel
| | | | | | | | - Thomas T. Tidwell
- Department of Chemistry , University of Toronto , Toronto , ON , Canada
| | | | | |
Collapse
|
10
|
Yaremenko IA, Belyakova YY, Radulov PS, Novikov RA, Medvedev MG, Krivoshchapov NV, Korlyukov AA, Alabugin IV, Terent Ev AO. Inverse α-Effect as the Ariadne's Thread on the Way to Tricyclic Aminoperoxides: Avoiding Thermodynamic Traps in the Labyrinth of Possibilities. J Am Chem Soc 2022; 144:7264-7282. [PMID: 35418230 DOI: 10.1021/jacs.2c00406] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Stable tricyclic aminoperoxides can be selectively assembled via a catalyst-free three-component condensation of β,δ'-triketones, H2O2, and an NH-group source such as aqueous ammonia or ammonium salts. This procedure is scalable and can produce gram quantities of tricyclic heterocycles, containing peroxide, nitrogen, and oxygen cycles in one molecule. Amazingly, such complex tricyclic molecules are selectively formed despite the multitude of alternative reaction routes, via equilibration of peroxide, hemiaminal, monoperoxyacetal, and peroxyhemiaminal functionalities! The reaction is initiated by the "stereoelectronic frustration" of H2O2 and combines elements of thermodynamic and kinetic control with a variety of mono-, bi-, and tricyclic structures evolving under the conditions of thermodynamic control until they reach a kinetic wall created by the inverse α-effect, that is, the stereoelectronic penalty for the formation of peroxycarbenium ions and related transition states. Under these conditions, the reaction stops before reaching the most thermodynamically stable products at a stage where three different heterocycles are assembled and fused at the acyclic precursor frame.
Collapse
Affiliation(s)
- Ivan A Yaremenko
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prosp., Moscow 119991, Russian Federation
| | - Yulia Yu Belyakova
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prosp., Moscow 119991, Russian Federation
| | - Peter S Radulov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prosp., Moscow 119991, Russian Federation
| | - Roman A Novikov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prosp., Moscow 119991, Russian Federation
| | - Michael G Medvedev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prosp., Moscow 119991, Russian Federation
| | - Nikolai V Krivoshchapov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prosp., Moscow 119991, Russian Federation.,Lomonosov Moscow State University, Leninskie Gory 1 (3), Moscow 119991, Russian Federation
| | - Alexander A Korlyukov
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilova Street, Moscow 119991, Russian Federation
| | - Igor V Alabugin
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Fl 32306, United States
| | - Alexander O Terent Ev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prosp., Moscow 119991, Russian Federation
| |
Collapse
|
11
|
Yaremenko IA, Radulov PS, Belyakova YY, Fomenkov DI, Tsogoeva SB, Terent’ev AO. Lewis Acids and Heteropoly Acids in the Synthesis of Organic Peroxides. Pharmaceuticals (Basel) 2022; 15:ph15040472. [PMID: 35455469 PMCID: PMC9025639 DOI: 10.3390/ph15040472] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 04/08/2022] [Accepted: 04/09/2022] [Indexed: 12/04/2022] Open
Abstract
Organic peroxides are an important class of compounds for organic synthesis, pharmacological chemistry, materials science, and the polymer industry. Here, for the first time, we summarize the main achievements in the synthesis of organic peroxides by the action of Lewis acids and heteropoly acids. This review consists of three parts: (1) metal-based Lewis acids in the synthesis of organic peroxides; (2) the synthesis of organic peroxides promoted by non-metal-based Lewis acids; and (3) the application of heteropoly acids in the synthesis of organic peroxides. The information covered in this review will be useful for specialists in the field of organic synthesis, reactions and processes of oxygen-containing compounds, catalysis, pharmaceuticals, and materials engineering.
Collapse
Affiliation(s)
- Ivan A. Yaremenko
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prosp., 119991 Moscow, Russia; (P.S.R.); (Y.Y.B.); (D.I.F.)
- Correspondence: (I.A.Y.); (A.O.T.)
| | - Peter S. Radulov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prosp., 119991 Moscow, Russia; (P.S.R.); (Y.Y.B.); (D.I.F.)
| | - Yulia Yu. Belyakova
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prosp., 119991 Moscow, Russia; (P.S.R.); (Y.Y.B.); (D.I.F.)
| | - Dmitriy I. Fomenkov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prosp., 119991 Moscow, Russia; (P.S.R.); (Y.Y.B.); (D.I.F.)
| | - Svetlana B. Tsogoeva
- Organic Chemistry Chair I and Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander University of Erlangen–Nürnberg, Nikolaus Fiebiger-Straße 10, 91058 Erlangen, Germany;
| | - Alexander O. Terent’ev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prosp., 119991 Moscow, Russia; (P.S.R.); (Y.Y.B.); (D.I.F.)
- Correspondence: (I.A.Y.); (A.O.T.)
| |
Collapse
|
12
|
Antonova AS, Nikitina EV, Valchuk KS, Grigoriev MS, Gomila RM, Frontera A, Zubkov FI. Crystal engineering of molecules with through-space α-effect hydrogen bonds: 3a,6 : 7,9a-diepoxybenzo[ de]isoquinolines possessing a free amino group. CrystEngComm 2022. [DOI: 10.1039/d2ce00903j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The existence of a “through-space” alpha-effect is analyzed in all-cis 3a,6 : 4,5 : 7,9a-triepoxy and 3a,6 : 7,9a-diepoxybenzo[de]isoquinolines. It is demonstrated that the H-bonds are enhanced by the α-effect.
Collapse
Affiliation(s)
- Alexandra S. Antonova
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky pr. 31, bld. 4, 119071 Moscow, Russian Federation
| | - Eugeniya V. Nikitina
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky pr. 31, bld. 4, 119071 Moscow, Russian Federation
| | - Karina S. Valchuk
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky pr. 31, bld. 4, 119071 Moscow, Russian Federation
| | - Mikhail S. Grigoriev
- Faculty of Science, Peoples' Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya St, 117198 Moscow, Russian Federation
| | - Rosa M. Gomila
- Department of Chemistry, Universitat de les Illes Balears, Crta. de Valldemossa km 7.5, 07122 Palma de Mallorca (Baleares), Spain
| | - Antonio Frontera
- Department of Chemistry, Universitat de les Illes Balears, Crta. de Valldemossa km 7.5, 07122 Palma de Mallorca (Baleares), Spain
| | - Fedor I. Zubkov
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky pr. 31, bld. 4, 119071 Moscow, Russian Federation
| |
Collapse
|
13
|
Laurikainen PV, Sarlin EL. Cut-off Scale and Complex Formation in Density Functional Theory Computations of Epoxy-Amine Reactivity. ACS OMEGA 2021; 6:29424-29431. [PMID: 34778615 PMCID: PMC8587129 DOI: 10.1021/acsomega.1c03229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 10/14/2021] [Indexed: 06/13/2023]
Abstract
Most of the properties of epoxy resins are tied to their degree of cross-linking, making understanding the reactivity of different epoxy systems a crucial aspect of their utilization. Here, epoxy-amine reactivity is studied with density functional theory (DFT) at various cut-off levels to explore the suitability of the method for estimating the reactivity of specific epoxy systems. Although it is common to use minimal structures in DFT to reduce computational cost, the results of this study highlight the important role of hydrogen bonding and other noncovalent interactions in the reactivity. This is a promising result for differentiating the most probable reactive paths for different resin systems. The significance of amine groups as a potential source of catalyzing H-bonds was also explored and, while not quite as effective as a catalyst as a hydroxyl group, a clear catalyzing effect was observed in the transition state energies. Unfortunately, the added complexity of a more representative reactive system also results in increased computational cost, highlighting the need for proper selection of structural cutoffs.
Collapse
Affiliation(s)
- Pekka V. Laurikainen
- Faculty of Engineering and Natural
Sciences, Tampere University, P. O. Box 589, FI-33014 Tampere, Finland
| | - Essi L. Sarlin
- Faculty of Engineering and Natural
Sciences, Tampere University, P. O. Box 589, FI-33014 Tampere, Finland
| |
Collapse
|
14
|
Alabugin IV, Kuhn L, Krivoshchapov NV, Mehaffy P, Medvedev MG. Anomeric effect, hyperconjugation and electrostatics: lessons from complexity in a classic stereoelectronic phenomenon. Chem Soc Rev 2021; 50:10212-10252. [PMID: 34542133 DOI: 10.1039/d1cs00564b] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Understanding the interplay of multiple components (steric, electrostatic, stereoelectronic, dispersive, etc.) that define the overall energy, structure, and reactivity of organic molecules can be a daunting task. The task becomes even more difficult when multiple approaches based on different physical premises disagree in their analysis of a multicomponent molecular system. Herein, we will use a classic conformational "oddity", the anomeric effect, to discuss the value of identifying the key contributors to reactivity that can guide chemical predictions. After providing the background related to the relevant types of hyperconjugation and a brief historic outline of the origins of the anomeric effect, we outline variations of its patterns and provide illustrative examples for the role of the anomeric effect in structure, stability, and spectroscopic properties. We show that the complete hyperconjugative model remains superior in explaining the interplay between structure and reactivity. We will use recent controversies regarding the origin of the anomeric effect to start a deeper discussion relevant to any electronic effect. Why are such questions inherently controversial? How to describe a complex quantum system using a model that is "as simple as possible, but no simpler"? What is a fair test for such a model? Perhaps, instead of asking "who is right and who is wrong?" one should ask "why do we disagree?". Stereoelectronic thinking can reconcile quantum complexity with chemical intuition and build the conceptual bridge between structure and reactivity. Even when many factors contribute to the observed structural and conformational trends, electron delocalization is a dominating force when the electronic demand is high (i.e., bonds are breaking as molecules distort from their equilibrium geometries). In these situations, the role of orbital interactions increases to the extent where they can define reactivity. For example, negative hyperconjugation can unleash the "underutilized" stereoelectronic power of unshared electrons (i.e., the lone pairs) to stabilize a developing positive charge at an anomeric carbon. This analysis paves the way for the broader discussion of the omnipresent importance of negative hyperconjugation in oxygen-containing functional groups. From that point of view, the stereoelectronic component of the anomeric effect plays a unique role in guiding reaction design.
Collapse
Affiliation(s)
- Igor V Alabugin
- Department of Chemistry and Biochemistry, Florida State University, USA.
| | - Leah Kuhn
- Department of Chemistry and Biochemistry, Florida State University, USA.
| | - Nikolai V Krivoshchapov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991 Moscow, Russian Federation. .,Lomonosov Moscow State University, Leninskie Gory 1 (3), Moscow, 119991, Russian Federation
| | - Patricia Mehaffy
- Department of Chemistry and Biochemistry, Florida State University, USA.
| | - Michael G Medvedev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991 Moscow, Russian Federation. .,A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilova St., 119991 Moscow, Russian Federation
| |
Collapse
|
15
|
Alabugin IV, Kuhn L, Medvedev MG, Krivoshchapov NV, Vil' VA, Yaremenko IA, Mehaffy P, Yarie M, Terent'ev AO, Zolfigol MA. Stereoelectronic power of oxygen in control of chemical reactivity: the anomeric effect is not alone. Chem Soc Rev 2021; 50:10253-10345. [PMID: 34263287 DOI: 10.1039/d1cs00386k] [Citation(s) in RCA: 66] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Although carbon is the central element of organic chemistry, oxygen is the central element of stereoelectronic control in organic chemistry. Generally, a molecule with a C-O bond has both a strong donor (a lone pair) and a strong acceptor (e.g., a σ*C-O orbital), a combination that provides opportunities to influence chemical transformations at both ends of the electron demand spectrum. Oxygen is a stereoelectronic chameleon that adapts to the varying situations in radical, cationic, anionic, and metal-mediated transformations. Arguably, the most historically important stereoelectronic effect is the anomeric effect (AE), i.e., the axial preference of acceptor groups at the anomeric position of sugars. Although AE is generally attributed to hyperconjugative interactions of σ-acceptors with a lone pair at oxygen (negative hyperconjugation), recent literature reports suggested alternative explanations. In this context, it is timely to evaluate the fundamental connections between the AE and a broad variety of O-functional groups. Such connections illustrate the general role of hyperconjugation with oxygen lone pairs in reactivity. Lessons from the AE can be used as the conceptual framework for organizing disjointed observations into a logical body of knowledge. In contrast, neglect of hyperconjugation can be deeply misleading as it removes the stereoelectronic cornerstone on which, as we show in this review, the chemistry of organic oxygen functionalities is largely based. As negative hyperconjugation releases the "underutilized" stereoelectronic power of unshared electrons (the lone pairs) for the stabilization of a developing positive charge, the role of orbital interactions increases when the electronic demand is high and molecules distort from their equilibrium geometries. From this perspective, hyperconjugative anomeric interactions play a unique role in guiding reaction design. In this manuscript, we discuss the reactivity of organic O-functionalities, outline variations in the possible hyperconjugative patterns, and showcase the vast implications of AE for the structure and reactivity. On our journey through a variety of O-containing organic functional groups, from textbook to exotic, we will illustrate how this knowledge can predict chemical reactivity and unlock new useful synthetic transformations.
Collapse
Affiliation(s)
- Igor V Alabugin
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL 32306, USA.
| | - Leah Kuhn
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL 32306, USA.
| | - Michael G Medvedev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991 Moscow, Russian Federation.,A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilova St., 119991 Moscow, Russian Federation
| | - Nikolai V Krivoshchapov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991 Moscow, Russian Federation.,Lomonosov Moscow State University, Leninskie Gory 1 (3), Moscow, 119991, Russian Federation
| | - Vera A Vil'
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991 Moscow, Russian Federation
| | - Ivan A Yaremenko
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991 Moscow, Russian Federation
| | - Patricia Mehaffy
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL 32306, USA.
| | - Meysam Yarie
- Department of Organic Chemistry, Faculty of Chemistry, Bu-Ali Sina University, Hamedan 65167, Iran
| | - Alexander O Terent'ev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991 Moscow, Russian Federation
| | - Mohammad Ali Zolfigol
- Department of Organic Chemistry, Faculty of Chemistry, Bu-Ali Sina University, Hamedan 65167, Iran
| |
Collapse
|
16
|
Hansen T, Vermeeren P, Bickelhaupt FM, Hamlin TA. Origin of the α‐Effect in S
N
2 Reactions. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202106053] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Thomas Hansen
- Department of Theoretical Chemistry Amsterdam Institute of Molecular and Life Sciences (AIMMS) Amsterdam Center for Multiscale Modeling (ACMM) Vrije Universiteit Amsterdam De Boelelaan 1083 1081 HV Amsterdam The Netherlands
- Leiden Institute of Chemistry Leiden University Einsteinweg 55 2333 CC Leiden The Netherlands
| | - Pascal Vermeeren
- Department of Theoretical Chemistry Amsterdam Institute of Molecular and Life Sciences (AIMMS) Amsterdam Center for Multiscale Modeling (ACMM) Vrije Universiteit Amsterdam De Boelelaan 1083 1081 HV Amsterdam The Netherlands
| | - F. Matthias Bickelhaupt
- Department of Theoretical Chemistry Amsterdam Institute of Molecular and Life Sciences (AIMMS) Amsterdam Center for Multiscale Modeling (ACMM) Vrije Universiteit Amsterdam De Boelelaan 1083 1081 HV Amsterdam The Netherlands
- Institute for Molecules and Materials Radboud University Heyendaalseweg 135 6525 AJ Nijmegen The Netherlands
| | - Trevor A. Hamlin
- Department of Theoretical Chemistry Amsterdam Institute of Molecular and Life Sciences (AIMMS) Amsterdam Center for Multiscale Modeling (ACMM) Vrije Universiteit Amsterdam De Boelelaan 1083 1081 HV Amsterdam The Netherlands
| |
Collapse
|
17
|
Hansen T, Vermeeren P, Bickelhaupt FM, Hamlin TA. Origin of the α-Effect in S N 2 Reactions. Angew Chem Int Ed Engl 2021; 60:20840-20848. [PMID: 34087047 PMCID: PMC8518820 DOI: 10.1002/anie.202106053] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 05/27/2021] [Indexed: 11/07/2022]
Abstract
The α-effect is a term used to explain the dramatically enhanced reactivity of α-nucleophiles (R-Y-X:- ) compared to their parent normal nucleophile (R-X:- ) by deviating from the classical Brønsted-type reactivity-basicity relationship. The exact origin of this effect is, however, still heavily under debate. In this work, we have quantum chemically analyzed the α-effect of a set of anionic nucleophiles, including O-, N- and S-based normal and α-nucleophiles, participating in an SN 2 reaction with ethyl chloride using relativistic density functional theory at ZORA-OLYP/QZ4P. Our activation strain and Kohn-Sham molecular orbital analyses identified two criteria an α-nucleophile needs to fulfill in order to show α-effect: (i) a small HOMO lobe on the nucleophilic center, pointing towards the substrate, to reduce the repulsive occupied-occupied orbital overlap and hence (steric) Pauli repulsion with the substrate; and (ii) a sufficiently high energy HOMO to overcome the loss of favorable HOMO-LUMO orbital overlap with the substrate, as a consequence of the first criterion, by reducing the HOMO-LUMO orbital energy gap. If one of these two criteria is not fulfilled, one can expect no α-effect or inverse α-effect.
Collapse
Affiliation(s)
- Thomas Hansen
- Department of Theoretical ChemistryAmsterdam Institute of Molecular and Life Sciences (AIMMS)Amsterdam Center for Multiscale Modeling (ACMM)Vrije Universiteit AmsterdamDe Boelelaan 10831081 HVAmsterdamThe Netherlands
- Leiden Institute of ChemistryLeiden UniversityEinsteinweg 552333 CCLeidenThe Netherlands
| | - Pascal Vermeeren
- Department of Theoretical ChemistryAmsterdam Institute of Molecular and Life Sciences (AIMMS)Amsterdam Center for Multiscale Modeling (ACMM)Vrije Universiteit AmsterdamDe Boelelaan 10831081 HVAmsterdamThe Netherlands
| | - F. Matthias Bickelhaupt
- Department of Theoretical ChemistryAmsterdam Institute of Molecular and Life Sciences (AIMMS)Amsterdam Center for Multiscale Modeling (ACMM)Vrije Universiteit AmsterdamDe Boelelaan 10831081 HVAmsterdamThe Netherlands
- Institute for Molecules and MaterialsRadboud UniversityHeyendaalseweg 1356525 AJNijmegenThe Netherlands
| | - Trevor A. Hamlin
- Department of Theoretical ChemistryAmsterdam Institute of Molecular and Life Sciences (AIMMS)Amsterdam Center for Multiscale Modeling (ACMM)Vrije Universiteit AmsterdamDe Boelelaan 10831081 HVAmsterdamThe Netherlands
| |
Collapse
|
18
|
Tsipis AC, Tsipis CA. Anomeric and Perlin Effect Ladders for 2-Substituted 2-Fluorotetrahydro-2 H-pyrans Using Sensitive Structural, Energetic, and NMR Probes. J Phys Chem A 2021; 125:7457-7472. [PMID: 34415753 DOI: 10.1021/acs.jpca.1c05706] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
A comprehensive exploration of the anomeric and Perlin effects in a series of 2-substituted-2-fluorotetrahydro-2H-pyrans employing sensitive structural, energetic, and NMR probes calculated by density functional theory (DFT) and natural bond orbital (NBO) approaches is undertaken. We used a wide variety of X substituents exhibiting diverse electronic features (σ-donors, σ-donors/π-donors, and σ-donors/π-acceptors). It is noteworthy that a group of 8 substituents (NHMe, SCN, OBr, NO3, OCl, Cl, OF, and Br) favor the axial conformations, while a group of 13 substituents (NO2, NF2, NH2, CN, SH, H, N3, B(OH)2, OMe, BH2, OH, Me, and Ph) favor the equatorial conformations. Interestingly, a group of 6 substituents (NH2, NHMe, NF2, OF, OCl, and OBr) are responsible for the observed normal Perlin effect while the remaining 16 substituents induce the reverse Perlin effect. An exhaustive investigation of possible correlations of anomeric and Perlin effect descriptors with structural, energetic, one-bond 1JC-F couplings and the nucleophilicity of X descriptors demonstrated the general relationship of the Perlin and anomeric effects and manifested their common stereoelectronic origin.
Collapse
Affiliation(s)
- Athanassios C Tsipis
- Laboratory of Inorganic Chemistry, Department of Chemistry, University of Ioannina, Ioannina 45110, Greece
| | - Constantinos A Tsipis
- Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| |
Collapse
|
19
|
Vil' VA, Merkulova VM, Ilovaisky AI, Paveliev SA, Nikishin GI, Terent'ev AO. Electrochemical Synthesis of Fluorinated Ketones from Enol Acetates and Sodium Perfluoroalkyl Sulfinates. Org Lett 2021; 23:5107-5112. [PMID: 34124913 DOI: 10.1021/acs.orglett.1c01643] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The electrochemical synthesis of fluorinated ketones from enol acetates and RfSO2Na in an undivided cell under constant current conditions was developed. The electrosynthesis proceeded via perfluoroalkyl radical generation from sodium perfluoroalkyl sulfinate followed by addition to the enol acetate and transformation of the resulting C radical to a fluorinated ketone. The method is applicable to a wide range of enol acetates and results in the desired products in yields of 20 to 85%.
Collapse
Affiliation(s)
- Vera A Vil'
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospekt, 119991 Moscow, Russian Federation
| | - Valentina M Merkulova
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospekt, 119991 Moscow, Russian Federation
| | - Alexey I Ilovaisky
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospekt, 119991 Moscow, Russian Federation
| | - Stanislav A Paveliev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospekt, 119991 Moscow, Russian Federation
| | - Gennady I Nikishin
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospekt, 119991 Moscow, Russian Federation
| | - Alexander O Terent'ev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospekt, 119991 Moscow, Russian Federation
| |
Collapse
|
20
|
Yaremenko IA, Belyakova YY, Radulov PS, Novikov RA, Medvedev MG, Krivoshchapov NV, Korlyukov AA, Alabugin IV, Terent'ev AO. Marriage of Peroxides and Nitrogen Heterocycles: Selective Three-Component Assembly, Peroxide-Preserving Rearrangement, and Stereoelectronic Source of Unusual Stability of Bridged Azaozonides. J Am Chem Soc 2021; 143:6634-6648. [PMID: 33877842 DOI: 10.1021/jacs.1c02249] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Stable bridged azaozonides can be selectively assembled via a catalyst-free three-component condensation of 1,5-diketones, hydrogen peroxide, and an NH-group source such as aqueous ammonia or ammonium salts. This procedure is scalable and can produce gram quantities of bicyclic stereochemically rich heterocycles. The new azaozonides are thermally stable and can be stored at room temperature for several months without decomposition and for at least 1 year at -10 °C. The chemical stability of azaozonides was explored for their subsequent selective transformations including the first example of an aminoperoxide rearrangement that preserves the peroxide group. The amino group in aminoperoxides has remarkably low nucleophilicity and does not participate in the usual amine alkylation and acylation reactions. These observations and the 15 pKa units decrease in basicity in comparison with a typical dialkyl amine are attributed to the strong hyperconjugative nN→σ*C-O interaction with the two antiperiplanar C-O bonds. Due to the weakness of the complementary nO→σ*C-N donation from the peroxide oxygens (a consequence of "inverse α-effect"), this interaction depletes electron density from the NH moiety, protects it from oxidation, and makes it similar in properties to an amide.
Collapse
Affiliation(s)
- Ivan A Yaremenko
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospekt, 119991 Moscow, Russian Federation
| | - Yulia Yu Belyakova
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospekt, 119991 Moscow, Russian Federation
| | - Peter S Radulov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospekt, 119991 Moscow, Russian Federation
| | - Roman A Novikov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospekt, 119991 Moscow, Russian Federation
| | - Michael G Medvedev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospekt, 119991 Moscow, Russian Federation
| | - Nikolai V Krivoshchapov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospekt, 119991 Moscow, Russian Federation
| | - Alexander A Korlyukov
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilova Street, 119991 Moscow, Russian Federation
| | - Igor V Alabugin
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Alexander O Terent'ev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospekt, 119991 Moscow, Russian Federation
| |
Collapse
|
21
|
Mondal R, Agbaria M, Nairoukh Z. Fluorinated Rings: Conformation and Application. Chemistry 2021; 27:7193-7213. [PMID: 33512034 DOI: 10.1002/chem.202005425] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Indexed: 12/16/2022]
Abstract
The introduction of fluorine atoms into molecules and materials across many fields of academic and industrial research is now commonplace, owing to their unique properties. A particularly interesting feature is the impact of fluorine substitution on the relative orientation of a C-F bond when incorporated into organic molecules. In this Review, we will be discussing the conformational behavior of fluorinated aliphatic carbo- and heterocyclic systems. The conformational preference of each system is associated with various interactions introduced by fluorine substitution such as charge-dipole, dipole-dipole, and hyperconjugative interactions. The contribution of each interaction on the stabilization of the fluorinated alicyclic system, which manifests itself in low conformations, will be discussed in detail. The novelty of this feature will be demonstrated by presenting the most recent applications.
Collapse
Affiliation(s)
- Rajarshi Mondal
- Institute of Chemistry, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Jerusalem, 9190401, Israel
| | - Mohamed Agbaria
- Institute of Chemistry, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Jerusalem, 9190401, Israel
| | - Zackaria Nairoukh
- Institute of Chemistry, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Jerusalem, 9190401, Israel
| |
Collapse
|
22
|
Auhim HS, Grigorenko BL, Harris TK, Aksakal OE, Polyakov IV, Berry C, Gomes GDP, Alabugin IV, Rizkallah PJ, Nemukhin AV, Jones DD. Stalling chromophore synthesis of the fluorescent protein Venus reveals the molecular basis of the final oxidation step. Chem Sci 2021; 12:7735-7745. [PMID: 34168826 PMCID: PMC8188506 DOI: 10.1039/d0sc06693a] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Accepted: 03/26/2021] [Indexed: 11/24/2022] Open
Abstract
Fluorescent proteins (FPs) have revolutionised the life sciences, but the mechanism of chromophore maturation is still not fully understood. Here we show that incorporation of a photo-responsive non-canonical amino acid within the chromophore stalls maturation of Venus, a yellow FP, at an intermediate stage; a crystal structure indicates the presence of O2 located above a dehydrated enolate form of the imidazolone ring, close to the strictly conserved Gly67 that occupies a twisted conformation. His148 adopts an "open" conformation so forming a channel that allows O2 access to the immature chromophore. Absorbance spectroscopy supported by QM/MM simulations suggests that the first oxidation step involves formation of a hydroperoxyl intermediate in conjunction with dehydrogenation of the methylene bridge. A fully conjugated mature chromophore is formed through release of H2O2, both in vitro and in vivo. The possibility of interrupting and photochemically restarting chromophore maturation and the mechanistic insights open up new approaches for engineering optically controlled fluorescent proteins.
Collapse
Affiliation(s)
- Husam Sabah Auhim
- School of Biosciences, Molecular Biosciences Division, Cardiff University Sir Martin Evans Building Cardiff CF10 3AX UK +44 (0)29 2087 4290
- Department of Biology, College of Science, University of Baghdad Baghdad Iraq
| | - Bella L Grigorenko
- Chemistry Department, Lomonosov Moscow State University Leninskie Gory, 1-3 Moscow Russian Federation +7 495 939 1096
- Emanuel Institute of Biochemical Physics, Russian Academy of Sciences Moscow Russian Federation
| | - Tessa K Harris
- School of Biosciences, Molecular Biosciences Division, Cardiff University Sir Martin Evans Building Cardiff CF10 3AX UK +44 (0)29 2087 4290
| | - Ozan E Aksakal
- School of Biosciences, Molecular Biosciences Division, Cardiff University Sir Martin Evans Building Cardiff CF10 3AX UK +44 (0)29 2087 4290
| | - Igor V Polyakov
- Chemistry Department, Lomonosov Moscow State University Leninskie Gory, 1-3 Moscow Russian Federation +7 495 939 1096
- Emanuel Institute of Biochemical Physics, Russian Academy of Sciences Moscow Russian Federation
| | - Colin Berry
- School of Biosciences, Molecular Biosciences Division, Cardiff University Sir Martin Evans Building Cardiff CF10 3AX UK +44 (0)29 2087 4290
| | - Gabriel Dos Passos Gomes
- Department of Chemistry, University of Toronto 80 St. George Street Toronto ON M5S 3H6 Canada
- Department of Computer Science, University of Toronto 214 College St. Toronto Ontario M5T 3A1 Canada
| | - Igor V Alabugin
- Department of Chemistry and Biochemistry, Florida State University Tallahassee Fl 32306 USA +1 850 644 5795
| | | | - Alexander V Nemukhin
- Chemistry Department, Lomonosov Moscow State University Leninskie Gory, 1-3 Moscow Russian Federation +7 495 939 1096
- Emanuel Institute of Biochemical Physics, Russian Academy of Sciences Moscow Russian Federation
| | - D Dafydd Jones
- School of Biosciences, Molecular Biosciences Division, Cardiff University Sir Martin Evans Building Cardiff CF10 3AX UK +44 (0)29 2087 4290
| |
Collapse
|
23
|
Panova MV, Medvedev MG, Mar'yasov MA, Lyssenko KA, Nasakin OE. Redirecting a Diels-Alder Reaction toward (2 + 2)-Cycloaddition. J Org Chem 2021; 86:4398-4404. [PMID: 33629842 DOI: 10.1021/acs.joc.0c02386] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Recently, reactions of allylidenhydrazones with tetracyanoethylene were found to lead to cyclobutanes-products of usually unfavorable (2 + 2) cycloaddition. Herein we computationally demonstrate that the (4 + 2) product of this reaction is severely destabilized by incomplete C-N bond formation, arising from a complex interplay of substituent electronic effects. We show how destabilization of a single bond in the front-runner product averts its formation and redirects chemical reaction toward an uncharacteristic pathway.
Collapse
Affiliation(s)
- Maria V Panova
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow 119991, Russian Federation
| | - Michael G Medvedev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow 119991, Russian Federation
| | - Maksim A Mar'yasov
- I. N. Ul'yanov Chuvash State University, Moskovskii Prospekt 15, Cheboksary 428015, Russian Federation
| | - Konstantin A Lyssenko
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1/3, Moscow 119991, Russian Federation.,Plekhanov Russian University of Economics, Stremyannyi pereulok 36, Moscow 117997, Russian Federation
| | - Oleg E Nasakin
- I. N. Ul'yanov Chuvash State University, Moskovskii Prospekt 15, Cheboksary 428015, Russian Federation
| |
Collapse
|
24
|
Brydon SC, Harris BL, White JM. Computational Study of the Donor-Acceptor Interactions Underlying the Variable Oxygen Probe. J Org Chem 2021; 86:3960-3969. [PMID: 33590758 DOI: 10.1021/acs.joc.0c02811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The variable oxygen probe (VOP) is a crystallographic technique that has been used to explore the relative donor abilities of various filled orbitals ranging from vicinal lone pairs to polarized heteroatom-carbon bonds, remote π functionalities, and strained carbon-carbon (CC) bonds. In this study, the donor-acceptor interactions which underlie the VOP have been explored in the gas phase using density functional theory on the model systems 1-13 with natural bond orbital analysis of the various donor-acceptor interactions involving both neutral and charged σ* antibonding orbitals as the acceptor probes. Updated values for the VOP slopes of 1-13 were shown to relate qualitatively with the sum of all significant donor-acceptor interactions present in these derivatives. Application of the VOP to calculated structures of 1-13 with various -OR substituents revealed a similar relationship between the C-OR bond distance to pKa (ROH). However, the VOP slopes in the gas phase were significantly smaller in magnitude than those obtained from crystal structural data, likely due to the valence form (C+-OR) being disfavored in the former, highlighting the advantage of the VOP as an experimental technique to discriminate donor ability more effectively than calculated structures.
Collapse
Affiliation(s)
- Samuel C Brydon
- School of Chemistry and Bio21 Institute, University of Melbourne, Parkville, VIC 3010, Australia
| | - Benjamin L Harris
- School of Chemistry and Bio21 Institute, University of Melbourne, Parkville, VIC 3010, Australia
| | - Jonathan M White
- School of Chemistry and Bio21 Institute, University of Melbourne, Parkville, VIC 3010, Australia
| |
Collapse
|
25
|
An JH, Kim KD, Lee JH. Highly Chemoselective Deoxygenation of N-Heterocyclic N-Oxides Using Hantzsch Esters as Mild Reducing Agents. J Org Chem 2021; 86:2876-2894. [DOI: 10.1021/acs.joc.0c02805] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ju Hyeon An
- Department of Advanced Materials Chemistry, Dongguk University, Gyeongju Campus, Gyeongju 38066, Republic of Korea
| | - Kyu Dong Kim
- Department of Advanced Materials Chemistry, Dongguk University, Gyeongju Campus, Gyeongju 38066, Republic of Korea
| | - Jun Hee Lee
- Department of Advanced Materials Chemistry, Dongguk University, Gyeongju Campus, Gyeongju 38066, Republic of Korea
| |
Collapse
|
26
|
Oliver L, Ragam S, Deslongchamps P, White JM, Hancock A, Brydon S. Application of the Variable Oxygen Probe to Derivatives of 2,6-Dimethyltetrahydropyran-4-ol: Evidence for Through-Bond nO–σCC–σ*CO Interactions. Aust J Chem 2021. [DOI: 10.1071/ch20149] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The variable oxygen probe has been applied to axial and equatorial 4-pyranols 4 and 5 and their ester and ether derivatives. Plots of C–OR bond distance versus pKa (ROH) provided evidence for slightly stronger donation into the σ*C–OR antibonding orbital in the equatorial derivatives 5 than in the axial derivatives 4, which is consistent with the presence of a through-bond nO–σCC–σ*CO interaction in 5. Evidence in support of this interpretation was also provided by density functional theory (DFT) calculations and natural bond orbital (NBO) analyses of the various orbital interactions in the 4-pyranols 4 and 5, their protonated analogues 4·H2O+ and 5·H2O+, and the corresponding cyclohexane derivatives 6, 7, 6·H2O+, and 7·H2O+.
Collapse
|
27
|
Le AT, Tran VTT, Le DT, Gomila RM, Frontera A, Zubkov FI. Synthesis, X-ray characterization and theoretical study of all- cis 1,4:2,3:5,8:6,7-tetraepoxynaphthalenes: on the importance of the through-space α-effect. CrystEngComm 2021. [DOI: 10.1039/d1ce01040a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This manuscript reports the synthesis, X-ray characterization and theoretical study of all-cis 1,4:2,3:5,8:6,7-tetraepoxynaphthalenes focusing on the importance of α-effect hydrogen bonds.
Collapse
Affiliation(s)
- Anh T. Le
- Faculty of Chemistry, VNU University of Science, Vietnam National University, Hanoi. 334 Nguyen Trai Str., Thanh Xuan, Hanoi 100000, Vietnam
| | - Van T. T. Tran
- Faculty of Chemistry, VNU University of Science, Vietnam National University, Hanoi. 334 Nguyen Trai Str., Thanh Xuan, Hanoi 100000, Vietnam
| | - Duan T. Le
- Faculty of Chemistry, VNU University of Science, Vietnam National University, Hanoi. 334 Nguyen Trai Str., Thanh Xuan, Hanoi 100000, Vietnam
| | - Rosa M. Gomila
- Department of Chemistry, Universitat de les Illes Balears, Crta. de Valldemossa km 7.5, 07122 Palma de Mallorca, Baleares, Spain
| | - Antonio Frontera
- Department of Chemistry, Universitat de les Illes Balears, Crta. de Valldemossa km 7.5, 07122 Palma de Mallorca, Baleares, Spain
| | - Fedor I. Zubkov
- Faculty of Science, Peoples' Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya St., Moscow 117198, Russian Federation
| |
Collapse
|
28
|
|
29
|
Sosa-Gil C, Babiano R, Cintas P, Light ME, Palacios JC. On the anomeric preference of the isothiocyanato group. NEW J CHEM 2021. [DOI: 10.1039/d1nj00852h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Anomeric effect of the isothiocyanato group has been quantified for the first time in xylopyranose triacetates; both anomers being synthesized.
Collapse
Affiliation(s)
- Concepción Sosa-Gil
- Departamento de Química Orgánica e Inorgánica
- Facultad de Ciencias, and IACYS-Unidad de Química Verde y Desarrollo Sostenible
- Universidad de Extremadura
- E-06006 Badajoz
- Spain
| | - Reyes Babiano
- Departamento de Química Orgánica e Inorgánica
- Facultad de Ciencias, and IACYS-Unidad de Química Verde y Desarrollo Sostenible
- Universidad de Extremadura
- E-06006 Badajoz
- Spain
| | - Pedro Cintas
- Departamento de Química Orgánica e Inorgánica
- Facultad de Ciencias, and IACYS-Unidad de Química Verde y Desarrollo Sostenible
- Universidad de Extremadura
- E-06006 Badajoz
- Spain
| | - Mark E. Light
- Department of Chemistry
- Faculty of Natural and Environmental Sciences
- The University of Southampton
- Southampton SO17 1BJ
- UK
| | - Juan C. Palacios
- Departamento de Química Orgánica e Inorgánica
- Facultad de Ciencias, and IACYS-Unidad de Química Verde y Desarrollo Sostenible
- Universidad de Extremadura
- E-06006 Badajoz
- Spain
| |
Collapse
|
30
|
Jung ST, Nickisch R, Reinsperger T, Luy B, Podlech J. Stereoelectronic effects: Perlin effects in cyclohexane‐derived compounds. J PHYS ORG CHEM 2020. [DOI: 10.1002/poc.4165] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Sebastian T. Jung
- Institute for Organic Chemistry Karlsruher Institute of Technology (KIT) Karlsruhe Germany
| | - Roman Nickisch
- Institute for Organic Chemistry Karlsruher Institute of Technology (KIT) Karlsruhe Germany
| | - Tony Reinsperger
- Institute for Organic Chemistry Karlsruher Institute of Technology (KIT) Karlsruhe Germany
- Institute for Biological Interfaces 4—Magnetic Resonance Karlsruher Institute of Technology (KIT) Eggenstein‐Leopoldshafen Germany
| | - Burkhard Luy
- Institute for Organic Chemistry Karlsruher Institute of Technology (KIT) Karlsruhe Germany
- Institute for Biological Interfaces 4—Magnetic Resonance Karlsruher Institute of Technology (KIT) Eggenstein‐Leopoldshafen Germany
| | - Joachim Podlech
- Institute for Organic Chemistry Karlsruher Institute of Technology (KIT) Karlsruhe Germany
| |
Collapse
|
31
|
Yaremenko IA, Radulov PS, Medvedev MG, Krivoshchapov NV, Belyakova YY, Korlyukov AA, Ilovaisky AI, Terent Ev AO, Alabugin IV. How to Build Rigid Oxygen-Rich Tricyclic Heterocycles from Triketones and Hydrogen Peroxide: Control of Dynamic Covalent Chemistry with Inverse α-Effect. J Am Chem Soc 2020; 142:14588-14607. [PMID: 32787239 DOI: 10.1021/jacs.0c06294] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
We describe an efficient one-pot procedure that "folds" acyclic triketones into structurally complex, pharmaceutically relevant tricyclic systems that combine high oxygen content with unusual stability. In particular, β,γ'-triketones are converted into three-dimensional polycyclic peroxides in the presence of H2O2 under acid catalysis. These transformations are fueled by stereoelectronic frustration of H2O2, the parent peroxide, where the lone pairs of oxygen are not involved in strongly stabilizing orbital interactions. Computational analysis reveals how this frustration is relieved in the tricyclic peroxide products, where strongly stabilizing anomeric nO→σC-O* interactions are activated. The calculated potential energy surfaces for these transformations combine labile, dynamically formed cationic species with deeply stabilized intermediate structures that correspond to the introduction of one, two, or three peroxide moieties. Paradoxically, as the thermodynamic stability of the peroxide products increases along this reaction cascade, the kinetic barriers for their formation increase as well. This feature of the reaction potential energy surface, which allows separation of mono- and bis-peroxide tricyclic products, also explains why formation of the most stable tris-peroxide is the least kinetically viable and is not observed experimentally. Such unique behavior can be explained through the "inverse α-effect", a new stereoelectronic phenomenon with many conceptual implications for the development of organic functional group chemistry.
Collapse
Affiliation(s)
- Ivan A Yaremenko
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., Moscow 119991, Russian Federation
| | - Peter S Radulov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., Moscow 119991, Russian Federation
| | - Michael G Medvedev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., Moscow 119991, Russian Federation
| | - Nikolai V Krivoshchapov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., Moscow 119991, Russian Federation.,Lomonosov Moscow State University, Leninskie Gory 1 (3), Moscow 119991, Russia
| | - Yulia Yu Belyakova
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., Moscow 119991, Russian Federation
| | - Alexander A Korlyukov
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilova st, Moscow 119991, Russian Federation
| | - Alexey I Ilovaisky
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., Moscow 119991, Russian Federation
| | - Alexander O Terent Ev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., Moscow 119991, Russian Federation
| | - Igor V Alabugin
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| |
Collapse
|
32
|
Zhu F, Walczak MA. Stereochemistry of Transition Metal Complexes Controlled by the Metallo-Anomeric Effect. J Am Chem Soc 2020; 142:15127-15136. [PMID: 32786781 DOI: 10.1021/jacs.0c06882] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The use of stereoelectronic interactions to control reactivity and selectivity has a long history in chemistry. The anomeric effect, one of the fundamental concepts in organic chemistry, describes the preferences of a substituent at the anomeric carbon in glycosides to adopt axial configuration when the anomeric group is an electronegative element such as oxygen or a halogen. The origin of the anomeric effect has been the subject of intense debate. Explanations capitalizing on either the delocalization of the endocyclic oxygen lone pair into the antibonding σ*(C-X) orbital or the minimization of the dipole-dipole interactions are currently the two leading theoretical models. Although the majority of experimental and theoretical studies have focused on the elements from groups 6 and 7, little is known about conformational preferences of tetrahydropyran rings substituted with a transition metal at the anomeric carbon and the role of these interactions in stereoselective synthesis. Here, we report studies on conformational and configurational preferences of organometallic complexes stabilized by vicinal heteroatoms. We provide computational evidence that late transition metals adopt the axial position in heterocycles or synclinal geometry in acyclic systems. Furthermore, the anomeric preferences of late transition metals correlate with the oxidation state of the metal and can be explained by hyperconjugative interactions between endocyclic heteroatom and the σ* acceptor orbitals of the C-M bond. In a broader context, this discovery provides insight into the role of previously unanticipated stereoelectronic effects that can be harnessed in the design of stereoselective reactions, including chemical glycosylation and enantioselective catalysis.
Collapse
Affiliation(s)
- Feng Zhu
- Department of Chemistry, University of Colorado, Boulder, Colorado 80309, United States
| | - Maciej A Walczak
- Department of Chemistry, University of Colorado, Boulder, Colorado 80309, United States
| |
Collapse
|
33
|
Vil' VA, Barsegyan YA, Kuhn L, Ekimova MV, Semenov EA, Korlyukov AA, Terent'ev AO, Alabugin IV. Synthesis of unstrained Criegee intermediates: inverse α-effect and other protective stereoelectronic forces can stop Baeyer-Villiger rearrangement of γ-hydroperoxy-γ-peroxylactones. Chem Sci 2020; 11:5313-5322. [PMID: 34122989 PMCID: PMC8159355 DOI: 10.1039/d0sc01025a] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Accepted: 05/05/2020] [Indexed: 12/17/2022] Open
Abstract
How far can we push the limits in removing stereoelectronic protection from an unstable intermediate? We address this question by exploring the interplay between the primary and secondary stereoelectronic effects in the Baeyer-Villiger (BV) rearrangement by experimental and computational studies of γ-OR-substituted γ-peroxylactones, the previously elusive non-strained Criegee intermediates (CI). These new cyclic peroxides were synthesized by the peroxidation of γ-ketoesters followed by in situ cyclization using a BF3·Et2O/H2O2 system. Although the primary effect (alignment of the migrating C-Rm bond with the breaking O-O bond) is active in the 6-membered ring, weakening of the secondary effect (donation from the OR lone pair to the breaking C-Rm bond) provides sufficient kinetic stabilization to allow the formation and isolation of stable γ-hydroperoxy-γ-peroxylactones with a methyl-substituent in the C6-position. Furthermore, supplementary protection is also provided by reactant stabilization originating from two new stereoelectronic factors, both identified and quantified for the first time in the present work. First, an unexpected boat preference in the γ-hydroperoxy-γ-peroxylactones weakens the primary stereoelectronic effects and introduces a ∼2 kcal mol-1 Curtin-Hammett penalty for reacquiring the more reactive chair conformation. Second, activation of the secondary stereoelectronic effect in the TS comes with a ∼2-3 kcal mol-1 penalty for giving up the exo-anomeric stabilization in the 6-membered Criegee intermediate. Together, the three new stereoelectronic factors (inverse α-effect, misalignment of reacting bonds in the boat conformation, and the exo-anomeric effect) illustrate the richness of stereoelectronic patterns in peroxide chemistry and provide experimentally significant kinetic stabilization to this new class of bisperoxides. Furthermore, mild reduction of γ-hydroperoxy-γ-peroxylactone with Ph3P produced an isolable γ-hydroxy-γ-peroxylactone, the first example of a structurally unencumbered CI where neither the primary nor the secondary stereoelectronic effect are impeded. Although this compound is relatively unstable, it does not undergo the BV reaction and instead follows a new mode of reactivity for the CI - a ring-opening process.
Collapse
Affiliation(s)
- Vera A Vil'
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences 47 Leninsky Prospect Moscow 119991 Russian Federation
| | - Yana A Barsegyan
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences 47 Leninsky Prospect Moscow 119991 Russian Federation
| | - Leah Kuhn
- Department of Chemistry and Biochemistry, Florida State University Tallahassee Fl 32306 USA
| | - Maria V Ekimova
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences 47 Leninsky Prospect Moscow 119991 Russian Federation
- D. I. Mendeleev University of Chemical Technology of Russia 9 Miusskaya Square Moscow 125047 Russian Federation
| | - Egor A Semenov
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences 47 Leninsky Prospect Moscow 119991 Russian Federation
- D. I. Mendeleev University of Chemical Technology of Russia 9 Miusskaya Square Moscow 125047 Russian Federation
| | - Alexander A Korlyukov
- A. N. Nesmeyanov Institute of Organoelement Compounds Russian Academy of Sciences 28 Vavilov Street Moscow 119991 Russian Federation
- Pirogov Russian National Research Medical University Moscow 117997 Russian Federation
| | - Alexander O Terent'ev
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences 47 Leninsky Prospect Moscow 119991 Russian Federation
| | - Igor V Alabugin
- Department of Chemistry and Biochemistry, Florida State University Tallahassee Fl 32306 USA
| |
Collapse
|
34
|
Elliott Q, Dos Passos Gomes G, Evoniuk CJ, Alabugin IV. Testing the limits of radical-anionic CH-amination: a 10-million-fold decrease in basicity opens a new path to hydroxyisoindolines via a mixed C-N/C-O-forming cascade. Chem Sci 2020; 11:6539-6555. [PMID: 34094120 PMCID: PMC8159354 DOI: 10.1039/c9sc06511c] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Accepted: 02/14/2020] [Indexed: 11/21/2022] Open
Abstract
An intramolecular C(sp3)-H amidation proceeds in the presence of t-BuOK, molecular oxygen, and DMF. This transformation is initiated by the deprotonation of an acidic N-H bond and selective radical activation of a benzylic C-H bond towards hydrogen atom transfer (HAT). Cyclization of this radical-anion intermediate en route to a two-centered/three-electron (2c,3e) C-N bond removes electron density from nitrogen. As this electronegative element resists such an "oxidation", making nitrogen more electron rich is key to overcoming this problem. This work dramatically expands the range of N-anions that can participate in this process by using amides instead of anilines. The resulting 107-fold decrease in the N-component basicity (and nucleophilicity) doubles the activation barrier for C-N bond formation and makes this process nearly thermoneutral. Remarkably, this reaction also converts a weak reductant into a much stronger reductant. Such "reductant upconversion" allows mild oxidants like molecular oxygen to complete the first part of the cascade. In contrast, the second stage of NH/CH activation forms a highly stabilized radical-anion intermediate incapable of undergoing electron transfer to oxygen. Because the oxidation is unfavored, an alternative reaction path opens via coupling between the radical anion intermediate and either superoxide or hydroperoxide radical. The hydroperoxide intermediate transforms into the final hydroxyisoindoline products under basic conditions. The use of TEMPO as an additive was found to activate less reactive amides. The combination of experimental and computational data outlines a conceptually new mechanism for conversion of unprotected amides into hydroxyisoindolines proceeding as a sequence of C-H amidation and C-H oxidation.
Collapse
Affiliation(s)
- Quintin Elliott
- Department of Chemistry and Biochemistry, Florida State University Tallahassee Florida 32306 USA
| | - Gabriel Dos Passos Gomes
- Department of Chemistry and Biochemistry, Florida State University Tallahassee Florida 32306 USA
| | - Christopher J Evoniuk
- Department of Chemistry and Biochemistry, Florida State University Tallahassee Florida 32306 USA
| | - Igor V Alabugin
- Department of Chemistry and Biochemistry, Florida State University Tallahassee Florida 32306 USA
| |
Collapse
|
35
|
Ueda M, Yasui M, Takeda N. Synthesis of Heterocycles Utilizing N-Alkoxyimines and Amides. HETEROCYCLES 2020. [DOI: 10.3987/rev-19-918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
36
|
Li Y, Zhao X. Gold-catalyzed domino cyclization enabling construction of diverse fused azaspiro tetracyclic scaffolds: a cascade catalysis mechanism due to a substrate and counterion. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00120a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The detailed mechanism and origins of gold-catalyzed domino cyclization to diverse fused azaspiro tetracyclic scaffolds by cooperative dual catalysis and cascade catalysis are systematically studied.
Collapse
Affiliation(s)
- Yunhe Li
- Institute for Chemical Physics & Department of Chemistry
- School of Science
- State Key Laboratory of Electrical Insulation and Power Equipment & MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter
- Xi'an Jiaotong University
- Xi'an710049
| | - Xiang Zhao
- Institute for Chemical Physics & Department of Chemistry
- School of Science
- State Key Laboratory of Electrical Insulation and Power Equipment & MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter
- Xi'an Jiaotong University
- Xi'an710049
| |
Collapse
|
37
|
Shimura J, Ando Y, Suzuki K. Hydroxylamine-Mediated Anthrapyranone Formation, Solving 5-exo/6-endo Issue toward Synthesis of Pluramycin-Class Antibiotics. Org Lett 2019; 22:175-179. [PMID: 31841345 DOI: 10.1021/acs.orglett.9b04127] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In our synthetic study on pluramycin-class antibiotics, an unexpected issue arose, i.e., unfavorable regioselectivity of 5-exo rather than 6-endo cyclization to form the pyranone ring. The issue was solved by an addition-elimination process of a phenol-ynone substrate. AZADOL was specifically effective, enabling the first synthesis of saptomycinone H.
Collapse
Affiliation(s)
- Jun Shimura
- Department of Chemistry , Tokyo Institute of Technology , 2-12-1 O-okayama , Meguro-ku , Tokyo 152-8551 , Japan
| | - Yoshio Ando
- Department of Chemistry , Tokyo Institute of Technology , 2-12-1 O-okayama , Meguro-ku , Tokyo 152-8551 , Japan
| | - Keisuke Suzuki
- Department of Chemistry , Tokyo Institute of Technology , 2-12-1 O-okayama , Meguro-ku , Tokyo 152-8551 , Japan
| |
Collapse
|
38
|
Vil' VA, Barsegyan YA, Barsukov DV, Korlyukov AA, Alabugin IV, Terent'ev AO. Peroxycarbenium Ions as the "Gatekeepers" in Reaction Design: Assistance from Inverse Alpha-Effect in Three-Component β-Alkoxy-β-peroxylactones Synthesis. Chemistry 2019; 25:14460-14468. [PMID: 31487079 DOI: 10.1002/chem.201903752] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Revised: 09/03/2019] [Indexed: 01/12/2023]
Abstract
Stereoelectronic interactions control reactivity of peroxycarbenium cations, the key intermediates in (per)oxidation chemistry. Computational analysis suggests that alcohol involvement as a third component in the carbonyl/peroxide reactions remained invisible due to the absence of sufficiently deep kinetic traps needed to prevent the escape of mixed alcohol/peroxide products to the more stable bisperoxides. Synthesis of β-alkoxy-β-peroxylactones, a new type of organic peroxides, was accomplished by interrupting a thermodynamically driven peroxidation cascade. The higher energy β-alkoxy-β-peroxylactones do not transform into the more stable bisperoxides due to the stereoelectronically imposed instability of a cyclic peroxycarbenium intermediate as a consequence of amplified inverse alpha-effect. The practical consequence of this fundamental finding is the first three-component cyclization/condensation of β-ketoesters, H2 O2 , and alcohols that provides β-alkoxy-β-peroxylactones in 15-80 % yields.
Collapse
Affiliation(s)
- Vera A Vil'
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospect, Moscow, 119991, Russian Federation.,All-Russian Research Institute for Phytopathology, B. Vyazyomy, Moscow Region, 143050, Russian Federation
| | - Yana A Barsegyan
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospect, Moscow, 119991, Russian Federation.,All-Russian Research Institute for Phytopathology, B. Vyazyomy, Moscow Region, 143050, Russian Federation
| | - Denis V Barsukov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospect, Moscow, 119991, Russian Federation
| | - Alexander A Korlyukov
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Street, Moscow, 119991, Russian Federation.,Pirogov Russian National Research Medical University, Moscow, 117997, Russian Federation
| | - Igor V Alabugin
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, 32309, USA
| | - Alexander O Terent'ev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospect, Moscow, 119991, Russian Federation.,All-Russian Research Institute for Phytopathology, B. Vyazyomy, Moscow Region, 143050, Russian Federation
| |
Collapse
|
39
|
Martins FA, Freitas MP. The FluorinegaucheEffect and a Comparison with Other Halogens in 2-Halofluoroethanes and 2-Haloethanols. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901234] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Francisco A. Martins
- Department of Chemistry; Federal University of Lavras; 37200-000 Lavras MG Brazil
| | - Matheus P. Freitas
- Department of Chemistry; Federal University of Lavras; 37200-000 Lavras MG Brazil
| |
Collapse
|
40
|
Silla JM, Andrade LAF, Freitas MP. Influence of stereoelectronic effects on the 1 J C─F spin-spin coupling constant in fluorinated heterocyclic compounds. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2019; 57:373-379. [PMID: 30776853 DOI: 10.1002/mrc.4854] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 02/05/2019] [Accepted: 02/13/2019] [Indexed: 06/09/2023]
Abstract
The Perlin effect and its analog for fluorinated compounds (the fluorine Perlin-like effect) manifest on one-bond C─H (C─F for the fluorine Perlin-like effect) spin-spin coupling constants (SSCCs) in six-membered rings. These effects can be useful to probe the stereochemistry (axial or equatorial) of the C─H and C─F bonds, respectively. The origin of these effects has been debatable in the literature as being due to hyperconjugative interactions, dipolar effects, and induced current density. Accordingly, a variety of model compounds has been used to probe such effects since the cyclohexanone carbonyl group and the endocyclic heteroatom lone pairs play different roles on the above-mentioned effects. Thus, the 1 JC─F SSCC in fluorinated lactams and lactones were theoretically studied to gain further insight on the nature of the fluorine Perlin-like effect. In addition, because the intramolecular α-effect has recently gained attention for its importance in the reactivity and stereoelectronic interactions in peroxide compounds, some fluorinated 1,2-dioxanes and 1,2-dithianes were studied to evaluate the role of the α-effect on the behavior of 1 JC─F SSCCs. Differently from fluorinated ketones and ethers, the fluorine Perlin-like effect in the amides and esters cannot be explained by hyperconjugative or dipolar interactions alone, because the resonance in these groups affect the 1 JC─F values. The O─O and S─S-containing systems exhibit a strong fluorine Perlin-like effect, but unlike the α-effect, this behavior cannot be explained neither by hyperconjugation nor by dipolar interactions alone; the spatial proximity of the C─F and O─O/S─S bonds is proposed to affect the magnitude of the 1 JC─F SSCC.
Collapse
Affiliation(s)
- Josué M Silla
- Department of Chemistry, Federal University of Lavras, 37200-000, Lavras, Brazil
| | - Laize A F Andrade
- Department of Chemistry, Federal University of Lavras, 37200-000, Lavras, Brazil
| | - Matheus P Freitas
- Department of Chemistry, Federal University of Lavras, 37200-000, Lavras, Brazil
| |
Collapse
|
41
|
Vil' VA, Gorlov ES, Bityukov OV, Barsegyan YA, Romanova YE, Merkulova VM, Terent'ev AO. C−O coupling of Malonyl Peroxides with Enol Ethers
via
[5+2] Cycloaddition: Non‐Rubottom Oxidation. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900271] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Vera A. Vil'
- N. D. Zelinsky Institute of Organic ChemistryRussian Academy of Sciences 47 Leninsky Prospect Moscow 119991 Russian Federation
| | - Evgenii S. Gorlov
- N. D. Zelinsky Institute of Organic ChemistryRussian Academy of Sciences 47 Leninsky Prospect Moscow 119991 Russian Federation
- D. I. Mendeleev University of Chemical Technology of Russia 9 Miusskaya Square Moscow 125047 Russian Federation
| | - Oleg V. Bityukov
- N. D. Zelinsky Institute of Organic ChemistryRussian Academy of Sciences 47 Leninsky Prospect Moscow 119991 Russian Federation
| | - Yana A. Barsegyan
- N. D. Zelinsky Institute of Organic ChemistryRussian Academy of Sciences 47 Leninsky Prospect Moscow 119991 Russian Federation
| | - Yulia E. Romanova
- N. D. Zelinsky Institute of Organic ChemistryRussian Academy of Sciences 47 Leninsky Prospect Moscow 119991 Russian Federation
- D. I. Mendeleev University of Chemical Technology of Russia 9 Miusskaya Square Moscow 125047 Russian Federation
| | - Valentina M. Merkulova
- N. D. Zelinsky Institute of Organic ChemistryRussian Academy of Sciences 47 Leninsky Prospect Moscow 119991 Russian Federation
| | - Alexander O. Terent'ev
- N. D. Zelinsky Institute of Organic ChemistryRussian Academy of Sciences 47 Leninsky Prospect Moscow 119991 Russian Federation
- D. I. Mendeleev University of Chemical Technology of Russia 9 Miusskaya Square Moscow 125047 Russian Federation
| |
Collapse
|
42
|
dos Passos Gomes G, Wimmer A, Smith JM, König B, Alabugin IV. CO2 or SO2: Should It Stay, or Should It Go? J Org Chem 2019; 84:6232-6243. [DOI: 10.1021/acs.joc.9b00503] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Gabriel dos Passos Gomes
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32309, United States
| | - Alexander Wimmer
- Institut für Organische Chemie, Universität Regensburg, Universitätsstraße 31, Regensburg 93040, Germany
| | - Joel M. Smith
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32309, United States
| | - Burkhard König
- Institut für Organische Chemie, Universität Regensburg, Universitätsstraße 31, Regensburg 93040, Germany
| | - Igor V. Alabugin
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32309, United States
| |
Collapse
|
43
|
Taherpour AA, Zolfigol MA. Reply to the comment on “A convenient method for preparation of 2-amino-4,6-diphenylnicotinonitrile using HBF4 as an efficient catalyst via an anomeric based oxidation: A joint experimental and theoretical study” [J. Mol. Struct. 1137 (2017) 674–680], by S. Salehzadeh and F. Maleki, J. Mol. Struct. 1154 (2018) 587–589. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2018.11.034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
44
|
Hughes AM, dos Passos Gomes G, Alabugin IV. Stereoelectronic Influence of a “Spectator” Propargylic Substituent Can Override Aromaticity Effects in Radical Peri-Cyclizations en Route to Expanded Polyaromatics. J Org Chem 2019; 84:1853-1862. [DOI: 10.1021/acs.joc.8b02779] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Audrey M. Hughes
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Gabriel dos Passos Gomes
- 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
| |
Collapse
|
45
|
Wang H, Zhang SQ, Hong X. Computational studies on Ni-catalyzed amide C–N bond activation. Chem Commun (Camb) 2019; 55:11330-11341. [DOI: 10.1039/c9cc05763c] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
This review summarizes the mechanistic models of Ni-catalyzed amide C–N bond cleavage and discusses their applications in related transformations.
Collapse
Affiliation(s)
- Hongliang Wang
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027
- China
| | - Shuo-Qing Zhang
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027
- China
| | - Xin Hong
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027
- China
| |
Collapse
|
46
|
Donnelly DP, Agar J, Lopez SA. Nucleophilic substitution reactions of cyclic thiosulfinates are accelerated by hyperconjugative interactions. Chem Sci 2019. [DOI: 10.1039/c9sc01098j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Cyclic thiosulfinates are a class of biocompatible molecules, currently expanding our in vivo toolkit.
Collapse
Affiliation(s)
- Daniel P. Donnelly
- Department of Chemistry and Chemical Biology
- Northeastern University
- Boston
- USA
- Barnett Institute of Chemical and Biological Analysis
| | - Jeffrey N. Agar
- Department of Chemistry and Chemical Biology
- Northeastern University
- Boston
- USA
- Barnett Institute of Chemical and Biological Analysis
| | - Steven A. Lopez
- Department of Chemistry and Chemical Biology
- Northeastern University
- Boston
- USA
| |
Collapse
|
47
|
Eske A, Ecker S, Fendinger C, Goldfuss B, Jonen M, Lefarth J, Neudörfl J, Spilles M, Griesbeck AG. Spirofused and Annulated 1,2,4‐Trioxepane‐, 1,2,4‐Trioxocane‐, and 1,2,4‐Trioxonane‐Cyclohexadienones: Cyclic Peroxides with Unusual Ring Conformation Dynamics. Angew Chem Int Ed Engl 2018; 57:13770-13774. [DOI: 10.1002/anie.201807485] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Revised: 08/02/2018] [Indexed: 12/20/2022]
Affiliation(s)
- Angelika Eske
- Department of ChemistryUniversity of Cologne Greinstr. 4 50939 Köln Germany
| | - Sabrina Ecker
- Department of ChemistryUniversity of Cologne Greinstr. 4 50939 Köln Germany
| | - Carolina Fendinger
- Department of ChemistryUniversity of Cologne Greinstr. 4 50939 Köln Germany
| | - Bernd Goldfuss
- Department of ChemistryUniversity of Cologne Greinstr. 4 50939 Köln Germany
| | - Matthis Jonen
- Department of ChemistryUniversity of Cologne Greinstr. 4 50939 Köln Germany
| | - Jens Lefarth
- Department of ChemistryUniversity of Cologne Greinstr. 4 50939 Köln Germany
| | - Jörg‐M. Neudörfl
- Department of ChemistryUniversity of Cologne Greinstr. 4 50939 Köln Germany
| | - Matthias Spilles
- Department of ChemistryUniversity of Cologne Greinstr. 4 50939 Köln Germany
| | - Axel G. Griesbeck
- Department of ChemistryUniversity of Cologne Greinstr. 4 50939 Köln Germany
| |
Collapse
|
48
|
Vil’ VA, Gomes GDP, Ekimova MV, Lyssenko KA, Syroeshkin MA, Nikishin GI, Alabugin IV, Terent’ev AO. Five Roads That Converge at the Cyclic Peroxy-Criegee Intermediates: BF3-Catalyzed Synthesis of β-Hydroperoxy-β-peroxylactones. J Org Chem 2018; 83:13427-13445. [DOI: 10.1021/acs.joc.8b02218] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Vera A. Vil’
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp, 119991 Moscow, Russian Federation
| | - Gabriel dos Passos Gomes
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee 32309, United States
| | - Maria V. Ekimova
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp, 119991 Moscow, Russian Federation
- D. I. Mendeleev University of Chemical Technology of Russia, 9 Miusskaya Square, Moscow 125047, Russian Federation
| | - Konstantin A. Lyssenko
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Street, Moscow 119991 Russian Federation
| | - Mikhail A. Syroeshkin
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp, 119991 Moscow, Russian Federation
| | - Gennady I. Nikishin
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp, 119991 Moscow, Russian Federation
| | - Igor V. Alabugin
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee 32309, United States
| | - Alexander O. Terent’ev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp, 119991 Moscow, Russian Federation
| |
Collapse
|
49
|
Eske A, Ecker S, Fendinger C, Goldfuss B, Jonen M, Lefarth J, Neudörfl J, Spilles M, Griesbeck AG. Spiroverknüpfte und ringanellierte 1,2,4‐Trioxepan‐, 1,2,4‐Trioxocan‐ und 1,2,4‐Trioxonan‐Cyclohexadienone: cyclische Peroxide mit ungewöhnlicher Ringkonformationsdynamik. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201807485] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Angelika Eske
- Department für ChemieUniversität zu Köln Greinstraße 4 50939 Köln Deutschland
| | - Sabrina Ecker
- Department für ChemieUniversität zu Köln Greinstraße 4 50939 Köln Deutschland
| | - Carolina Fendinger
- Department für ChemieUniversität zu Köln Greinstraße 4 50939 Köln Deutschland
| | - Bernd Goldfuss
- Department für ChemieUniversität zu Köln Greinstraße 4 50939 Köln Deutschland
| | - Matthis Jonen
- Department für ChemieUniversität zu Köln Greinstraße 4 50939 Köln Deutschland
| | - Jens Lefarth
- Department für ChemieUniversität zu Köln Greinstraße 4 50939 Köln Deutschland
| | - Jörg‐M. Neudörfl
- Department für ChemieUniversität zu Köln Greinstraße 4 50939 Köln Deutschland
| | - Matthias Spilles
- Department für ChemieUniversität zu Köln Greinstraße 4 50939 Köln Deutschland
| | - Axel G. Griesbeck
- Department für ChemieUniversität zu Köln Greinstraße 4 50939 Köln Deutschland
| |
Collapse
|
50
|
Alabugin IV, dos Passos Gomes G, Abdo MA. Hyperconjugation. WILEY INTERDISCIPLINARY REVIEWS-COMPUTATIONAL MOLECULAR SCIENCE 2018. [DOI: 10.1002/wcms.1389] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
|