1
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Ozaki T, Bentley SK, Rybansky N, Li B, Liu SY. A BN-Benzvalene. J Am Chem Soc 2024; 146:24748-24753. [PMID: 39082667 DOI: 10.1021/jacs.4c08088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/12/2024]
Abstract
The synthesis and crystallographic characterization of BN-benzvalene, the first second-row heteroatom-containing benzvalene, is described. BN-benzvalenes are produced via photoexcitation of C5-aryl-substituted 1,2-azaborines under flow conditions. Mechanistic studies support a boron-specific, two-step photoisomerization pathway involving a BN-Dewar benzene intermediate, which is distinct from the photoisomerization pathway proposed in benzene and phospha- and silabenzenes for the formation of their respective benzvalene analogues.
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Affiliation(s)
- Tomoya Ozaki
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Sierra K Bentley
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Nina Rybansky
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Bo Li
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Shih-Yuan Liu
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
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2
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Tsien J, Hu C, Merchant RR, Qin T. Three-dimensional saturated C(sp 3)-rich bioisosteres for benzene. Nat Rev Chem 2024; 8:605-627. [PMID: 38982260 DOI: 10.1038/s41570-024-00623-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/24/2024] [Indexed: 07/11/2024]
Abstract
Benzenes, the most ubiquitous structural moiety in marketed small-molecule drugs, are frequently associated with poor 'drug-like' properties, including metabolic instability, and poor aqueous solubility. In an effort to overcome these limitations, recent developments in medicinal chemistry have demonstrated the improved physicochemical profiles of C(sp3)-rich bioisosteric scaffolds relative to arenes. In the past two decades, we have witnessed an exponential increase in synthetic methods for accessing saturated bioisosteres of monosubstituted and para-substituted benzenes. However, until recent discoveries, analogous three-dimensional ortho-substituted and meta-substituted biososteres have remained underexplored, owing to their ring strain and increased s-character hybridization. This Review summarizes the emerging synthetic methodologies to access such saturated motifs and their impact on the application of bioisosteres for ortho-substituted, meta-substituted and multi-substituted benzene rings. It concludes with a perspective on the development of next-generation bioisosteres, including those within novel chemical space.
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Affiliation(s)
- Jet Tsien
- Department of Biochemistry, The University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Chao Hu
- Department of Biochemistry, The University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Rohan R Merchant
- Department of Discovery Chemistry, Merck & Co., Inc., South San Francisco, CA, USA
| | - Tian Qin
- Department of Biochemistry, The University of Texas Southwestern Medical Center, Dallas, TX, USA.
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3
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Tyler JL, Aggarwal VK. Synthesis and Applications of Bicyclo[1.1.0]butyl and Azabicyclo[1.1.0]butyl Organometallics. Chemistry 2023; 29:e202300008. [PMID: 36786481 PMCID: PMC10947034 DOI: 10.1002/chem.202300008] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Revised: 02/11/2023] [Accepted: 02/14/2023] [Indexed: 02/15/2023]
Abstract
The use of metalated (aza)bicyclo[1.1.0]butanes in synthesis is currently experiencing a renaissance, as evidenced by the numerous reports in the last 5 years that have relied on such intermediates to undergo unique transformations or generate novel fragments. Since their discovery, these species have been demonstrated to participate in a wide range of reactions with carbon and heteroatom electrophiles, as well as metal complexes, to facilitate the rapid diversification of (aza)bicyclo[1.1.0]butane-containing compounds. Key to this is the relative acidity of the bridgehead C-H bonds which promotes facile deprotonation and subsequent functionalization of an unsubstituted position on the carbon framework via the intermediacy of a metalated (aza)bicyclo[1.1.0]butane. Additionally, the late-stage incorporation of deuterium atoms in strained fragments has led to the elucidation of numerous reaction mechanisms that involve strained bicycles. The continued investigation into the inimitable reactivity of metalated bicycles will cement their importance within the field of organometallic chemistry.
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Affiliation(s)
- Jasper L. Tyler
- School of ChemistryUniversity of BristolCantock's CloseBristolBS8 1TSUK
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4
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Anderson JM, Measom ND, Murphy JA, Poole DL. Bridge Functionalisation of Bicyclo[1.1.1]pentane Derivatives. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202106352] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Joseph M. Anderson
- GlaxoSmithKline Medicines Research Centre Gunnels Wood Road Stevenage Hertfordshire SG1 2NY UK
- Department of Pure and Applied Chemistry WestCHEM University of Strathclyde 295 Cathedral Street Glasgow Scotland G1 1XL UK
| | - Nicholas D. Measom
- GlaxoSmithKline Medicines Research Centre Gunnels Wood Road Stevenage Hertfordshire SG1 2NY UK
| | - John A. Murphy
- Department of Pure and Applied Chemistry WestCHEM University of Strathclyde 295 Cathedral Street Glasgow Scotland G1 1XL UK
| | - Darren L. Poole
- GlaxoSmithKline Medicines Research Centre Gunnels Wood Road Stevenage Hertfordshire SG1 2NY UK
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5
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Anderson JM, Measom ND, Murphy JA, Poole DL. Bridge Functionalisation of Bicyclo[1.1.1]pentane Derivatives. Angew Chem Int Ed Engl 2021; 60:24754-24769. [PMID: 34151501 PMCID: PMC9291545 DOI: 10.1002/anie.202106352] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Indexed: 12/30/2022]
Abstract
"Escaping from flatland", by increasing the saturation level and three-dimensionality of drug-like compounds, can enhance their potency, selectivity and pharmacokinetic profile. One approach that has attracted considerable recent attention is the bioisosteric replacement of aromatic rings, internal alkynes and tert-butyl groups with bicyclo[1.1.1]pentane (BCP) units. While functionalisation of the tertiary bridgehead positions of BCP derivatives is well-documented, functionalisation of the three concyclic secondary bridge positions remains an emerging field. The unique properties of the BCP core present considerable synthetic challenges to the development of such transformations. However, the bridge positions provide novel vectors for drug discovery and applications in materials science, providing entry to novel chemical and intellectual property space. This Minireview aims to consolidate the major advances in the field, serving as a useful reference to guide further work that is expected in the coming years.
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Affiliation(s)
- Joseph M. Anderson
- GlaxoSmithKline Medicines Research CentreGunnels Wood RoadStevenageHertfordshireSG1 2NYUK
- Department of Pure and Applied ChemistryWestCHEMUniversity of Strathclyde295 Cathedral StreetGlasgowScotlandG1 1XLUK
| | - Nicholas D. Measom
- GlaxoSmithKline Medicines Research CentreGunnels Wood RoadStevenageHertfordshireSG1 2NYUK
| | - John A. Murphy
- Department of Pure and Applied ChemistryWestCHEMUniversity of Strathclyde295 Cathedral StreetGlasgowScotlandG1 1XLUK
| | - Darren L. Poole
- GlaxoSmithKline Medicines Research CentreGunnels Wood RoadStevenageHertfordshireSG1 2NYUK
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6
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Le TP, Rončević I, Dračínský M, Císařová I, Šolínová V, Kašička V, Kaleta J. Polyhalogenated Bicyclo[1.1.1]pentane-1,3-dicarboxylic Acids. J Org Chem 2021; 86:10303-10319. [PMID: 34269057 DOI: 10.1021/acs.joc.1c01020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Herein we report the highly selective radical chlorination of 2,2-difluorobicyclo[1.1.1]pentane-1,3-dicarboxylic acid. Together with radical hydrodechlorination by TMS3SiH, four new bicyclo[1.1.1]pentane cages carrying two fluorine and one to three chlorine atoms in bridge positions have been obtained. The exact positions of all halogen atoms have been confirmed by X-ray diffraction. The acidity constants (pKa) for all new derivatives have been determined by capillary electrophoresis, and these experimental values show excellent agreement with pKas predicted by DFT methods. Extensive DFT calculations have been used to rationalize the selective formation of four out of nine possible F2Cl1-4 isomers of bridge-halogenated bicyclo[1.1.1]pentanes and to obtain relative strain energies for all possible isomers.
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Affiliation(s)
- Thi Phuong Le
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 160 00 Prague 6, Czech Republic
| | - Igor Rončević
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 160 00 Prague 6, Czech Republic
| | - Martin Dračínský
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 160 00 Prague 6, Czech Republic
| | - Ivana Císařová
- Department of Inorganic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, 12840 Prague 2, Czech Republic
| | - Veronika Šolínová
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 160 00 Prague 6, Czech Republic
| | - Václav Kašička
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 160 00 Prague 6, Czech Republic
| | - Jiří Kaleta
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 160 00 Prague 6, Czech Republic
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7
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Kaleta J, Bastien G, Wen J, Dračínský M, Tortorici E, Císařová I, Beale PD, Rogers CT, Michl J. Bulk Inclusions of Double Pyridazine Molecular Rotors in Hexagonal Tris(o-phenylene)cyclotriphosphazene. J Org Chem 2019; 84:8449-8467. [DOI: 10.1021/acs.joc.9b00553] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Jiří Kaleta
- Institute of Organic Chemistry and Biochemistry of the CAS, Flemingovo nám. 2, 166 10 Prague 6, Czech Republic
- Department of Chemistry, University of Colorado, Boulder, Colorado 80309-0215, United States
| | - Guillaume Bastien
- Institute of Organic Chemistry and Biochemistry of the CAS, Flemingovo nám. 2, 166 10 Prague 6, Czech Republic
| | - Jin Wen
- Institute of Organic Chemistry and Biochemistry of the CAS, Flemingovo nám. 2, 166 10 Prague 6, Czech Republic
| | - Martin Dračínský
- Institute of Organic Chemistry and Biochemistry of the CAS, Flemingovo nám. 2, 166 10 Prague 6, Czech Republic
| | - Edward Tortorici
- Department of Physics, University of Colorado, Boulder, Colorado 80309, United States
| | - Ivana Císařová
- Department of Inorganic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, 12840 Prague 2, Czech Republic
| | - Paul D. Beale
- Department of Physics, University of Colorado, Boulder, Colorado 80309, United States
| | - Charles T. Rogers
- Department of Physics, University of Colorado, Boulder, Colorado 80309, United States
| | - Josef Michl
- Institute of Organic Chemistry and Biochemistry of the CAS, Flemingovo nám. 2, 166 10 Prague 6, Czech Republic
- Department of Chemistry, University of Colorado, Boulder, Colorado 80309-0215, United States
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8
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Kaleta J, Rončević I, Císařová I, Dračínský M, Šolínová V, Kašička V, Michl J. Bridge-Chlorinated Bicyclo[1.1.1]pentane-1,3-dicarboxylic Acids. J Org Chem 2019; 84:2448-2461. [DOI: 10.1021/acs.joc.8b02780] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Jiří Kaleta
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 166 10 Prague 6, Czech Republic
- Department of Chemistry, University of Colorado, Boulder, Colorado 80309-0215, United States
| | - Igor Rončević
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 166 10 Prague 6, Czech Republic
| | - Ivana Císařová
- Department of Inorganic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, 12840 Prague 2, Czech Republic
| | - Martin Dračínský
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 166 10 Prague 6, Czech Republic
| | - Veronika Šolínová
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 166 10 Prague 6, Czech Republic
| | - Václav Kašička
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 166 10 Prague 6, Czech Republic
| | - Josef Michl
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 166 10 Prague 6, Czech Republic
- Department of Chemistry, University of Colorado, Boulder, Colorado 80309-0215, United States
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9
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Kaleta J, Bastien G, Císařová I, Batail P, Michl J. Molecular Rods: Facile Desymmetrization of 1,4-Diethynylbicyclo[2.2.2]octane. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800507] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jiří Kaleta
- Institute of Organic Chemistry and Biochemistry AS CR; Flemingovo nám. 2 16610 Praha 6 Czech Republic
| | - Guillaume Bastien
- Institute of Organic Chemistry and Biochemistry AS CR; Flemingovo nám. 2 16610 Praha 6 Czech Republic
| | - Ivana Císařová
- Department of Inorganic Chemistry; Faculty of Science; Charles University in Prague; Hlavova 2030 12840 Prague 2 Czech Republic
| | - Patrick Batail
- Laboratoire MOLTECH-Anjou; CNRS UMR 6200; Université d'Angers; 49045 Angers France
| | - Josef Michl
- Institute of Organic Chemistry and Biochemistry AS CR; Flemingovo nám. 2 16610 Praha 6 Czech Republic
- Department of Chemistry and Biochemistry; University of Colorado; 80309-0215 Boulder CO United States
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10
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Rodríguez-Fortea A, Kaleta J, Mézière C, Allain M, Canadell E, Wzietek P, Michl J, Batail P. Asymmetric Choreography in Pairs of Orthogonal Rotors. ACS OMEGA 2018; 3:1293-1297. [PMID: 29399655 PMCID: PMC5793037 DOI: 10.1021/acsomega.7b01580] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Accepted: 01/19/2018] [Indexed: 05/14/2023]
Abstract
An asymmetric mechanism for correlated motion occurring in noninteracting pairs of adjacent orthogonal 1,4-bis(carboxyethynyl)bicyclo[1.1.1]pentane (BCP) rotators 1 in the solid state is unraveled and shown to play an important role in understanding the dynamics in the crystalline rotor, Bu4N+[1-]·H2O. Single crystal X-ray diffraction and calculation of rotor-rotor interaction energies combined with variable-temperature, variable-field 1H spin-lattice relaxation experiments led to the identification and microscopic rationalization of two distinct relaxation processes.
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Affiliation(s)
- Antonio Rodríguez-Fortea
- Departament
de Química Física i Inorgànica, Universitat Rovira i Virgili, Marcel·lí Domingo 1, 43007 Tarragona, Spain
| | - Jiří Kaleta
- Institute
of Organic Chemistry and Biochemistry, Academy
of Sciences of the Czech Republic, Flemingovo nam, 2, Prague 6, 16610 Prague, Czech Republic
| | - Cécile Mézière
- Laboratoire
MOLTECH-Anjou, CNRS UMR 6200, Université d’Angers, 49045 Angers, France
| | - Magali Allain
- Laboratoire
MOLTECH-Anjou, CNRS UMR 6200, Université d’Angers, 49045 Angers, France
| | - Enric Canadell
- Institut
de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus de la UAB, 08193 Bellaterra, Spain
- E-mail: (E.C.)
| | - Pawel Wzietek
- Laboratoire
de Physique des Solides, CNRS & Université de Paris-Sud, 91405 Orsay, France
- E-mail: (P.W.)
| | - Josef Michl
- Institute
of Organic Chemistry and Biochemistry, Academy
of Sciences of the Czech Republic, Flemingovo nam, 2, Prague 6, 16610 Prague, Czech Republic
- Department
of Chemistry and Biochemistry, University
of Colorado Boulder, Boulder, Colorado 80309-0215, United States
- E-mail: (J.M.)
| | - Patrick Batail
- Laboratoire
MOLTECH-Anjou, CNRS UMR 6200, Université d’Angers, 49045 Angers, France
- E-mail: (P.B.)
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11
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12
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Kaleta J, Kaletová E, Císařová I, Teat SJ, Michl J. Synthesis of Triptycene-Based Molecular Rotors for Langmuir–Blodgett Monolayers. J Org Chem 2015; 80:10134-50. [DOI: 10.1021/acs.joc.5b01753] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jiří Kaleta
- Institute
of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 16610 Prague, Czech Republic
| | - Eva Kaletová
- Institute
of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 16610 Prague, Czech Republic
| | - Ivana Císařová
- Department
of Inorganic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, 12840 Prague 2, Czech Republic
| | - Simon J. Teat
- Advanced
Light Source, Lawrence Berkeley National Laboratory, 1 Cyclotron
Road, Berkeley, California 94720, United States
| | - Josef Michl
- Institute
of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 16610 Prague, Czech Republic
- Department
of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0215, United States
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13
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Xiang Z, Cao D, Dai L. Well-defined two dimensional covalent organic polymers: rational design, controlled syntheses, and potential applications. Polym Chem 2015. [DOI: 10.1039/c4py01383b] [Citation(s) in RCA: 166] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Recent developments in the design, synthesis and application of 2D covalent organic polymers are reviewed, along with some perspectives and challenges.
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Affiliation(s)
- Zhonghua Xiang
- Center of Advanced Science and Engineering for Carbon (Case4Carbon)
- Department of Macromolecular Science and Engineering
- Case Western Reserve University
- Cleveland
- USA
| | - Dapeng Cao
- State Key Lab of Organic–Inorganic Composites
- Beijing University of Chemical Technology
- Beijing 100029
- P.R. China
| | - Liming Dai
- Center of Advanced Science and Engineering for Carbon (Case4Carbon)
- Department of Macromolecular Science and Engineering
- Case Western Reserve University
- Cleveland
- USA
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14
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Kaleta J, Michl J, Mézière C, Simonov S, Zorina L, Wzietek P, Rodríguez-Fortea A, Canadell E, Batail P. Gearing motion in cogwheel pairs of molecular rotors: weak-coupling limit. CrystEngComm 2015. [DOI: 10.1039/c5ce01372k] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Investigation of the rotor dynamics by X-ray diffraction, spin–lattice relaxation, and DFT modelling of the two rotational barriers in arrays of rod-like molecules with 1,3-bis(ethynyl)bicyclo[1.1.1]pentane rotators conclude to gearing motion between two rotors in a pair.
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Affiliation(s)
- Jiří Kaleta
- Institute of Organic Chemistry and Biochemistry
- Academy of Sciences of the Czech Republic
- 16610 Prague 6, Czech Republic
| | - Josef Michl
- Institute of Organic Chemistry and Biochemistry
- Academy of Sciences of the Czech Republic
- 16610 Prague 6, Czech Republic
- Department of Chemistry and Biochemistry
- University of Colorado
| | - Cécile Mézière
- Laboratoire MolTech-Anjou
- Université d'Angers
- CNRS UMR 6200
- 49045 Angers, France
| | - Sergey Simonov
- Institute of Solid State Physics RAS
- 142432 Chernogolovka MD, Russia
| | - Leokadiya Zorina
- Institute of Solid State Physics RAS
- 142432 Chernogolovka MD, Russia
| | - Pawel Wzietek
- Laboratoire de Physique des Solides
- Université de Paris-Sud
- CNRS UMR 6502
- 91405 Orsay, France
| | | | - Enric Canadell
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC)
- Campus de la UAB
- Bellaterra, Spain
| | - Patrick Batail
- Laboratoire MolTech-Anjou
- Université d'Angers
- CNRS UMR 6200
- 49045 Angers, France
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15
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Kaleta J, Nečas M, Mazal C. 1,3-Diethynylbicyclo[1.1.1]pentane, a Useful Molecular Building Block. European J Org Chem 2012. [DOI: 10.1002/ejoc.201200351] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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16
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Rajakannu P, Shankar B, Yadav A, Shanmugam R, Gupta D, Hussain F, Chang CH, Sathiyendiran M, Lu KL. Adaptation toward Restricted Conformational Dynamics: From the Series of Neutral Molecular Rotors. Organometallics 2011. [DOI: 10.1021/om200269z] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
| | | | - Anju Yadav
- Department of Chemistry, University of Delhi, Delhi 110 007, India
| | | | - Deepak Gupta
- Department of Chemistry, University of Delhi, Delhi 110 007, India
| | - Firasat Hussain
- Department of Chemistry, University of Delhi, Delhi 110 007, India
| | - Che-Hao Chang
- Institute of Chemistry, Academia Sinica, Taipei 115, Taiwan, Republic of China
| | | | - Kuang-Lieh Lu
- Institute of Chemistry, Academia Sinica, Taipei 115, Taiwan, Republic of China
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17
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Kaleta J, Mazal C. A Triangular Macrocycle Altering Planar and Bulky Sections in Its Molecular Backbone. Org Lett 2011; 13:1326-9. [DOI: 10.1021/ol1031816] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jiří Kaleta
- Department of Chemistry, Faculty of Science, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic
| | - Ctibor Mazal
- Department of Chemistry, Faculty of Science, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic
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