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Maity S, Roy A, Duari S, Biswas S, Elsharif AM, Biswas S. Methyltrifluoromethanesulfonate Catalyst in Direct Nucleophilic Substitution of Alcohols; One-Pot Synthesis of 4 H-Chromene Derivatives. ACS OMEGA 2023; 8:46614-46627. [PMID: 38107960 PMCID: PMC10720287 DOI: 10.1021/acsomega.3c05619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 11/06/2023] [Accepted: 11/10/2023] [Indexed: 12/19/2023]
Abstract
The catalytic activity of methyltrifluoromethanesulfonate (MeOTf) has been explored toward direct nucleophilic substitution of the hydroxyl group of nonmanipulated alcohols such as benzylic, allylic, propargylic, and tertiary alcohols with a wide range of uncharged nucleophiles such as 1,3-dicarbonyl compounds, amides, alkynes, and indoles to generate functionalized 1,3-dicarbonyl compounds, amides, alkynes, and indoles, respectively. Thus, the present protocol defines an alternate pathway to construct new C-C, C-N, and C-O bonds with the formation of water as the byproduct under mild conditions without any acids or metals. A completely different mechanism was established through several control experiments to explain the reaction methodology. As an application of the reported protocol, 1H-indene derivatives have been synthesized in one pot when benzylic alcohols were subjected to react with internal alkynes. The scope of the reaction has been further extended toward a tandem benzylation-cyclization-dehydration of 1,3-dicarbonyl compounds with 2-hydroxybenzyl alcohols, which furnish biologically important 4H-chromene derivatives.
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Affiliation(s)
- Srabani Maity
- Department
of Chemistry, University of Calcutta, 92, A.P.C. Road, Kolkata 700 009, West Bengal, India
| | - Arnab Roy
- Department
of Chemistry, University of Calcutta, 92, A.P.C. Road, Kolkata 700 009, West Bengal, India
| | - Surajit Duari
- Department
of Chemistry, University of Calcutta, 92, A.P.C. Road, Kolkata 700 009, West Bengal, India
| | - Subrata Biswas
- Department
of Chemistry, University of Calcutta, 92, A.P.C. Road, Kolkata 700 009, West Bengal, India
| | - Asma M. Elsharif
- Department
of Chemistry, Imam Abdulrahman Bin Faisal
University, P.O. Box 1982, Dammam 31441, Saudi Arabia
| | - Srijit Biswas
- Department
of Chemistry, University of Calcutta, 92, A.P.C. Road, Kolkata 700 009, West Bengal, India
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2
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Shernyukov AV, Salnikov GE, Krasnov VI, Genaev AM. Cluster halogenation of adamantane and its derivatives with bromine and iodine monochloride. Org Biomol Chem 2022; 20:8515-8527. [DOI: 10.1039/d2ob01455f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Noncatalytic halogenation of adamantane with Br2 or ICl proceeds according to the cluster mechanism featuring high kinetic order in halogen and a sharp decrease in DFT energy barrier when additional halogen molecules are involved in the system.
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Affiliation(s)
- Andrey V. Shernyukov
- N.N. Vorozhtsov Institute of Organic Chemistry, Pr. Ak. Lavrentieva 9, Novosibirsk 630090, Russia
| | - George E. Salnikov
- N.N. Vorozhtsov Institute of Organic Chemistry, Pr. Ak. Lavrentieva 9, Novosibirsk 630090, Russia
| | - Vyacheslav I. Krasnov
- N.N. Vorozhtsov Institute of Organic Chemistry, Pr. Ak. Lavrentieva 9, Novosibirsk 630090, Russia
| | - Alexander M. Genaev
- N.N. Vorozhtsov Institute of Organic Chemistry, Pr. Ak. Lavrentieva 9, Novosibirsk 630090, Russia
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3
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Hejda M, Duvinage D, Lork E, Lyčka A, Černošek Z, Macháček J, Makarov S, Ketkov S, Mebs S, Dostál L, Beckmann J. Lewis Superacidic Tellurenyl Cation-Induced Electrophilic Activation of an Inert Carborane. Chemistry 2021; 27:14577-14581. [PMID: 34495561 PMCID: PMC8596995 DOI: 10.1002/chem.202103181] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Indexed: 11/09/2022]
Abstract
The aryltellurenyl cation [2-(tBuNCH)C6 H4 Te]+ , a Lewis super acid, and the weakly coordinating carborane anion [CB11 H12 ]- , an extremely weak Brønsted acid (pKa =131.0 in MeCN), form an isolable ion pair complex [2-(tBuNCH)C6 H4 Te][CB11 H12 ], in which the Brønsted acidity (pKa 7.4 in MeCN) of the formally hydridic B-H bonds is dramatically increased by more than 120 orders of magnitude. The electrophilic activation of B-H bonds in the carborane moiety gives rise to a proton transfer from boron to nitrogen at slightly elevated temperatures, as rationalized by the isolation of a mixture of the zwitterionic isomers 12- and 7-[2-(tBuN{H}CH)C6 H4 Te(CB11 H11 )] in ratios ranging from 62 : 38 to 80 : 20.
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Affiliation(s)
- Martin Hejda
- Institut für Anorganische Chemie und KristallographieUniversität BremenLeobener Straße 728359BremenGermany
- Department of General and Inorganic ChemistryUniversity of PardubiceStudentská 573532 10PardubiceCzech Republic
| | - Daniel Duvinage
- Institut für Anorganische Chemie und KristallographieUniversität BremenLeobener Straße 728359BremenGermany
| | - Enno Lork
- Institut für Anorganische Chemie und KristallographieUniversität BremenLeobener Straße 728359BremenGermany
| | - Antonín Lyčka
- Faculty of ScienceUniversity of Hradec KrálovéRokitanského 62500 03Hradec Králové 3Czech Republic
| | - Zdeněk Černošek
- Department of General and Inorganic ChemistryUniversity of PardubiceStudentská 573532 10PardubiceCzech Republic
| | - Jan Macháček
- Institute of Inorganic ChemistryCzech Academy of Sciences250 68Řež near PragueCzech Republic
| | - Sergey Makarov
- G. A. Razuvaev Institute of Organometallic Chemistry RAS49 Tropinin St.603950Nizhny NovgorodRussian Federation
| | - Sergey Ketkov
- G. A. Razuvaev Institute of Organometallic Chemistry RAS49 Tropinin St.603950Nizhny NovgorodRussian Federation
| | - Stefan Mebs
- Institut für ExperimentalphysikFreie Universität BerlinArnimallee 1414195BerlinGermany
| | - Libor Dostál
- Department of General and Inorganic ChemistryUniversity of PardubiceStudentská 573532 10PardubiceCzech Republic
| | - Jens Beckmann
- Institut für Anorganische Chemie und KristallographieUniversität BremenLeobener Straße 728359BremenGermany
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4
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Shernyukov AV, Salnikov GE, Rudakov DA, Genaev AM. Noncatalytic Bromination of Icosahedral Dicarboranes: The Key Role of Anionic Bromine Clusters Facilitating Br Atom Insertion into the B-H σ-Bond. Inorg Chem 2021; 60:3106-3116. [PMID: 33595316 DOI: 10.1021/acs.inorgchem.0c03392] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The mechanism of the noncatalytic bromination of carboranes was studied experimentally and theoretically. We found that the reactions of o- and m-carboranes 1 and 2 with elemental bromine are first order in the substrate but unusually high (approximately fifth) order in bromine. The calculated energy barriers of these reactions decrease sharply as more bromine molecules are added to the quantum-chemical system. A considerable primary deuterium kinetic isotope effect for the bromination of 2 indicates that the rate-limiting stage is B-H bond breakage. According to quantum-chemical reaction path calculations, the bond breakage proceeds after the intrusion of a bromine atom into the B-H σ-bond. The 9-Br and 9-OH substituents in carborane 1 strongly retard the bromination of the corresponding derivatives. The bromination mechanism of 9-OH-1 is complex and includes neutral, deprotonated, and protonated forms of the carborane. The high experimental kinetic reaction order in bromine, together with quantum chemical modeling, points to a specific mechanism of bromination facilitated by anionic bromine clusters which significantly stabilize the transition state.
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Affiliation(s)
- Andrey V Shernyukov
- N.N. Vorozhtsov Institute of Organic Chemistry, Pr. Ak. Lavrentieva 9, Novosibirsk 630090, Russia
| | - George E Salnikov
- N.N. Vorozhtsov Institute of Organic Chemistry, Pr. Ak. Lavrentieva 9, Novosibirsk 630090, Russia
| | - Dmitry A Rudakov
- N.N. Vorozhtsov Institute of Organic Chemistry, Pr. Ak. Lavrentieva 9, Novosibirsk 630090, Russia
| | - Alexander M Genaev
- N.N. Vorozhtsov Institute of Organic Chemistry, Pr. Ak. Lavrentieva 9, Novosibirsk 630090, Russia
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5
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Rončević I, Bastien G, Cvačka J, Kaleta J, Michl J. CB11H10– and Related Carborenes. Inorg Chem 2020; 59:12453-12460. [DOI: 10.1021/acs.inorgchem.0c01557] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Igor Rončević
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 16610 Prague 6, Czech Republic
| | - Guillaume Bastien
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 16610 Prague 6, Czech Republic
| | - Josef Cvačka
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 16610 Prague 6, Czech Republic
| | - Jiří Kaleta
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 16610 Prague 6, Czech Republic
| | - Josef Michl
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 16610 Prague 6, Czech Republic
- Department of Chemistry, University of Colorado, Boulder, Colorado 80309-0215, United States
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Pecyna J, Rončević I, Michl J. Insertion of Carbenes into Deprotonated nido-Undecaborane, B 11H 13(2-). Molecules 2019; 24:E3779. [PMID: 31640159 PMCID: PMC6833071 DOI: 10.3390/molecules24203779] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 10/09/2019] [Accepted: 10/09/2019] [Indexed: 11/17/2022] Open
Abstract
We have examined the insertion of carbenes carrying leaving groups into the [nido-B11H13]2- dianion to form the [closo-1-CB11H12]- anion. The best procedure uses CF3SiMe3 and LiCl as the source of CF2. It is simple, convenient and scalable and proceeds with 70-90% yield. Density functional calculations have been used to develop a mechanistic proposal that accounts for the different behavior of CF2, requiring only one equivalent of base for successful conversion of Na[nido-B11H14]- to [closo-1-CB11H12]-, and CCl2 and CBr2, which require more.
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Affiliation(s)
- Jacek Pecyna
- Department of Chemistry, University of Colorado, Boulder, CO 80309-0215, USA.
| | - Igor Rončević
- Institute of Organic Chemistry and Biochemistry Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 16610 Prague 6, Czech Republic.
| | - Josef Michl
- Department of Chemistry, University of Colorado, Boulder, CO 80309-0215, USA.
- Institute of Organic Chemistry and Biochemistry Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 16610 Prague 6, Czech Republic.
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7
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Bakardjiev M, Růžička A, Růžičková Z, Tok OL, Holub J, Hnyk D, Fanfrlík J, Štíbr B. Synthesis of closo-1,2-H 2C 2B 8Me 8 and 1,2-H 2C 2B 8Me 7X (X = I and OTf) Dicarbaboranes and Their Rearrangement Reactions. Inorg Chem 2019; 58:2865-2871. [PMID: 30730720 DOI: 10.1021/acs.inorgchem.8b03550] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Methyl-camouflaged dicarbaboranes closo-1,2- and 1,10-H2C2B8Me8 have been prepared in high yields either from nido-5,6-H2C2B8H10 or closo-1,2-H2C2B8H8 via electrophilic methylation reactions and cluster-rearrangement methods. Prepared were also monosubstituted derivatives of general formulation closo-H2C2B8Me7-X (X = I or OTf). The permethylated compounds exhibit extreme air stability in comparison to unprotected counterparts as a consequence of rigid, egg-shaped hydrocarbon structures incorporating inner C2B8 carborane scaffolding. The structures of all compounds isolated were confirmed unambiguously by multinuclear (11B, 1H, 13C, and 19F) NMR measurements, supported by X-ray diffraction analyses and geometry optimization methods on several compounds.
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Affiliation(s)
- Mario Bakardjiev
- Institute of Inorganic Chemistry of the Czech Academy of Sciences , 250 68 Husinec-Řež , Czech Republic
| | - Aleš Růžička
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology , University of Pardubice , Studentská 573 , 532 10 Pardubice , Czech Republic
| | - Zdeňka Růžičková
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology , University of Pardubice , Studentská 573 , 532 10 Pardubice , Czech Republic
| | - Oleg L Tok
- Institute of Inorganic Chemistry of the Czech Academy of Sciences , 250 68 Husinec-Řež , Czech Republic
| | - Josef Holub
- Institute of Inorganic Chemistry of the Czech Academy of Sciences , 250 68 Husinec-Řež , Czech Republic
| | - Drahomír Hnyk
- Institute of Inorganic Chemistry of the Czech Academy of Sciences , 250 68 Husinec-Řež , Czech Republic
| | - Jindřich Fanfrlík
- Institute of Organic Chemistry and Biochemisty , of the Czech Academy of Sciences , Flemingovo nám, 5 , Prague 6 , Czech Republic
| | - Bohumil Štíbr
- Institute of Inorganic Chemistry of the Czech Academy of Sciences , 250 68 Husinec-Řež , Czech Republic
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8
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Chen Y. Recent Advances in Methylation: A Guide for Selecting Methylation Reagents. Chemistry 2018; 25:3405-3439. [DOI: 10.1002/chem.201803642] [Citation(s) in RCA: 119] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Yantao Chen
- Medicinal Chemistry, Cardiovascular, Renal and Metabolism, IMED Biotech UnitAstraZeneca Gothenburg Sweden
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9
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Bakardjiev M, Tok OL, RůŽička A, RůŽičková Z, Holub J, Hnyk D, Špalt Z, Fanfrlík J, Štíbr B. Methyl camouflage in the ten-vertex closo-dicarbaborane(10) series. Isolation of closo-1,6-R 2C 2B 8Me 8 (R = H and Me) and their monosubstituted analogues. Dalton Trans 2018; 47:11070-11076. [PMID: 30033463 DOI: 10.1039/c8dt02586j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Reported are procedures leading to the first types of methyl camouflaged dicarbadecaboranes with fewer than eleven vertices. The compounds contain the closo-1,6-C2B8 scaffolding inside the egg-shaped hepta - decamethyl sheath, which imparts unusually high air and solvolytic stability to all of these compounds.
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Affiliation(s)
- Mario Bakardjiev
- Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic, Husinec-ŘeŽ 1001, Czech Republic
| | - Oleg L Tok
- Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic, Husinec-ŘeŽ 1001, Czech Republic
| | - Aleš RůŽička
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice, Czech Republic
| | - Zdeňka RůŽičková
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice, Czech Republic
| | - Josef Holub
- Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic, Husinec-ŘeŽ 1001, Czech Republic
| | - Drahomír Hnyk
- Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic, Husinec-ŘeŽ 1001, Czech Republic
| | - Zbyněk Špalt
- Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic, Husinec-ŘeŽ 1001, Czech Republic
| | - Jindřich Fanfrlík
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 166 10 Prague 6, Czech Republic
| | - Bohumil Štíbr
- Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic, Husinec-ŘeŽ 1001, Czech Republic
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Wahab A, Douvris C, Klíma J, Šembera F, Ugolotti J, Kaleta J, Ludvík J, Michl J. Anodic Oxidation of 18 Halogenated and/or Methylated Derivatives of CB 11H 12. Inorg Chem 2016; 56:269-276. [PMID: 27936641 DOI: 10.1021/acs.inorgchem.6b02126] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Anodic oxidation of [CB11H12]- and 18 of its halogenated and/or methylated derivatives was examined. Reversible oxidation was found for four of the anions in liquid SO2 and for four more in 1,1,1,3,3,3-hexafluoroisopropyl alcohol. The oxidation occurred at ∼1 V (for [CB11Me12]-) up to more than 4 V (for [1-H-(2-6)-F5-(7-12)-(CF3)6-CB11]-) relative to ferrocene/ferricinium. The anodic peak potentials are reproduced by a set of additive position-sensitive substituent increments.
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Affiliation(s)
- Abdul Wahab
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic , Flemingovo nám. 2, 16610 Prague 6, Czech Republic.,J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic , Dolejškova 3, 18223 Prague 8, Czech Republic
| | - Christos Douvris
- Department of Chemistry and Biochemistry, University of Colorado , Boulder, Colorado 80309-0215, United States
| | - Jiří Klíma
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic , Dolejškova 3, 18223 Prague 8, Czech Republic
| | - Filip Šembera
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic , Flemingovo nám. 2, 16610 Prague 6, Czech Republic
| | - Juri Ugolotti
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic , Flemingovo nám. 2, 16610 Prague 6, Czech Republic
| | - Jiří Kaleta
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic , Flemingovo nám. 2, 16610 Prague 6, Czech Republic
| | - Jiří Ludvík
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic , Dolejškova 3, 18223 Prague 8, Czech Republic
| | - Josef Michl
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic , Flemingovo nám. 2, 16610 Prague 6, Czech Republic.,Department of Chemistry and Biochemistry, University of Colorado , Boulder, Colorado 80309-0215, United States
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Bakardjiev M, Štíbr B, Holub J, Tok OL, Švec P, Růžičková Z, Růžička A. Sequential Camouflage of the arachno-6,9-C 2B 8H 14 Cage by Substituents. Inorg Chem 2016; 55:7068-74. [DOI: 10.1021/acs.inorgchem.6b00964] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Mario Bakardjiev
- Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic, 25068 Řež, Czech Republic
| | - Bohumil Štíbr
- Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic, 25068 Řež, Czech Republic
| | - Josef Holub
- Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic, 25068 Řež, Czech Republic
| | - Oleg L. Tok
- Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic, 25068 Řež, Czech Republic
| | - Petr Švec
- Department of General and Inorganic Chemistry,
Faculty of Chemical Technology, University of Pardubice, Studentská
573, 53210 Pardubice, Czech Republic
| | - Zdeňka Růžičková
- Department of General and Inorganic Chemistry,
Faculty of Chemical Technology, University of Pardubice, Studentská
573, 53210 Pardubice, Czech Republic
| | - Aleš Růžička
- Department of General and Inorganic Chemistry,
Faculty of Chemical Technology, University of Pardubice, Studentská
573, 53210 Pardubice, Czech Republic
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