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Qiu SQ, Ahmad T, Xu YH, Loh TP. Palladium-Catalyzed Cascade Intramolecular Cyclization and Allylation of Enynoates with Allylic Alcohols. J Org Chem 2019; 84:6729-6736. [PMID: 31081618 DOI: 10.1021/acs.joc.9b00461] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A Pd(II)-catalyzed mild and highly regioselective 6- endo cyclization/allylation reaction of enynoates with simple allylic alcohols has been developed. Under mild reaction conditions, the vinyl palladium species generated in situ after cyclization could insert C-C double bond of allylic alcohol through cross-coupling reaction and lead to the formation of allyl pyrone via β-OH elimination. This cascade cross-coupling reaction represents a direct and atom economic methodology for the construction of novel allyl pyrones in moderate to good yields.
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Affiliation(s)
- Sheng-Qi Qiu
- Department of Chemistry , University of Science and Technology of China , Hefei 230026 , China
| | - Tanveer Ahmad
- Department of Chemistry , University of Science and Technology of China , Hefei 230026 , China
| | - Yun-He Xu
- Department of Chemistry , University of Science and Technology of China , Hefei 230026 , China
| | - Teck-Peng Loh
- Department of Chemistry , University of Science and Technology of China , Hefei 230026 , China.,Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences , Nanyang Technological University , Singapore 637371
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3
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Wenholz DS, Bhadbhade M, Kandemir H, Ho J, Kumar N, Black DS. Substituent effects in solid-state assembly of activated benzotriazoles. CrystEngComm 2019. [DOI: 10.1039/c8ce01757c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Aromatic donor–acceptor stacking involving electron-rich π-donors and electron-deficient π-acceptors has been utilized in a broad spectrum of diverse applications to great effect.
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Affiliation(s)
| | | | - Hakan Kandemir
- School of Chemistry
- UNSW Sydney
- Australia
- Department of Chemistry
- Faculty of Art and Science
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4
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Chakraborty S, Kar H, Sikder A, Ghosh S. Steric ploy for alternating donor-acceptor co-assembly and cooperative supramolecular polymerization. Chem Sci 2017; 8:1040-1045. [PMID: 28451242 PMCID: PMC5356505 DOI: 10.1039/c6sc02640k] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Accepted: 09/17/2016] [Indexed: 12/17/2022] Open
Abstract
The presence of a bulky peripheral wedge destabilizes the homo-assembly of an amide functionalized acceptor (A) monomer and thereby enables the formation of an alternating supramolecular copolymer with an amide appended donor (D) monomer via the synergistic effect of H-bonding and the charge-transfer (CT) interaction with a remarkably high Ka of 31 000 M-1. In sharp contrast, H-bonding driven homo-polymers of A and D are formed by just replacing the bulky chains of the A monomer with linear hydrocarbons. By taking advantage of the clear difference in the critical temperature for the onset of the AA or DD homo-assemblies and DA co-assembly (TDA ≫ TAA or TDD), the supramolecular polymerization pathway of the NDI-monomer could be fully diverted from isodesmic to cooperative in the presence of a small amount of DAN which helped the in situ production of nucleating sites involving the D-A CT-complex at a relatively higher temperature and the subsequent chain growth at TAA following the nucleation-elongation model.
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Affiliation(s)
- Saptarshi Chakraborty
- Polymer Science Unit , Indian Association for the Cultivation of Science , Kolkata , India-700032 .
| | - Haridas Kar
- Polymer Science Unit , Indian Association for the Cultivation of Science , Kolkata , India-700032 .
| | - Amrita Sikder
- Polymer Science Unit , Indian Association for the Cultivation of Science , Kolkata , India-700032 .
| | - Suhrit Ghosh
- Polymer Science Unit , Indian Association for the Cultivation of Science , Kolkata , India-700032 .
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Krajczyk A, Zeidler J, Januszczyk P, Dawadi S, Boshoff HI, Barry CE, Ostrowski T, Aldrich CC. 2-Aryl-8-aza-3-deazaadenosine analogues of 5'-O-[N-(salicyl)sulfamoyl]adenosine: Nucleoside antibiotics that block siderophore biosynthesis in Mycobacterium tuberculosis. Bioorg Med Chem 2016; 24:3133-43. [PMID: 27265685 DOI: 10.1016/j.bmc.2016.05.037] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Revised: 05/17/2016] [Accepted: 05/19/2016] [Indexed: 11/16/2022]
Abstract
A series of 5'-O-[N-(salicyl)sulfamoyl]-2-aryl-8-aza-3-deazaadenosines were designed to block mycobactin biosynthesis in Mycobacterium tuberculosis (Mtb) through inhibition of the essential adenylating enzyme MbtA. The synthesis of the 2-aryl-8-aza-3-deazaadenosine nucleosides featured sequential copper-free palladium-catalyzed Sonogashira coupling of a precursor 4-cyano-5-iodo-1,2,3-triazolonucleoside with terminal alkynes and a Minakawa-Matsuda annulation reaction. These modified nucleosides were shown to inhibit MbtA with apparent Ki values ranging from 6.1 to 25nM and to inhibit Mtb growth under iron-deficient conditions with minimum inhibitory concentrations ranging from 12.5 to >50μM.
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Affiliation(s)
- Anna Krajczyk
- Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 12/14, 61-704 Poznan, Poland
| | - Joanna Zeidler
- Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 12/14, 61-704 Poznan, Poland
| | - Piotr Januszczyk
- Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 12/14, 61-704 Poznan, Poland
| | - Surendra Dawadi
- Department of Medicinal Chemistry, University of Minnesota, Minneapolis, MN 55455, USA
| | - Helena I Boshoff
- Tuberculosis Research Section, National Institute of Allergy and Infectious Diseases, Bethesda, MD 20892, USA
| | - Clifton E Barry
- Tuberculosis Research Section, National Institute of Allergy and Infectious Diseases, Bethesda, MD 20892, USA
| | - Tomasz Ostrowski
- Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 12/14, 61-704 Poznan, Poland.
| | - Courtney C Aldrich
- Department of Medicinal Chemistry, University of Minnesota, Minneapolis, MN 55455, USA.
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Liu HY, Chen LF, Wang HY, Wan Y, Wu H. Synthesis and photophysical properties of novel fluorescent materials containing 2,4,6-triphenylpyridine and 1,8-naphthalimide units using Suzuki reaction. RSC Adv 2016. [DOI: 10.1039/c6ra16408k] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A series of novel 2,4,6-triphenylpyridine derivatives containing 1,8-naphthalimide groups have been prepared. The relationship of photoluminescence property of the products and the theoretical calculation analysis were investigated.
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Affiliation(s)
- Hui-Yan Liu
- School of Chemistry and Chemical Engineering
- Jiangsu Normal University
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Key Laboratory of Biotechnology on Medical Plant of Jiangsu Province
- Xuzhou 221116
| | - Liang-Feng Chen
- School of Chemistry and Chemical Engineering
- Jiangsu Normal University
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Key Laboratory of Biotechnology on Medical Plant of Jiangsu Province
- Xuzhou 221116
| | - Hai-Ying Wang
- School of Chemistry and Chemical Engineering
- Jiangsu Normal University
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Key Laboratory of Biotechnology on Medical Plant of Jiangsu Province
- Xuzhou 221116
| | - Yu Wan
- School of Chemistry and Chemical Engineering
- Jiangsu Normal University
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Key Laboratory of Biotechnology on Medical Plant of Jiangsu Province
- Xuzhou 221116
| | - Hui Wu
- School of Chemistry and Chemical Engineering
- Jiangsu Normal University
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Key Laboratory of Biotechnology on Medical Plant of Jiangsu Province
- Xuzhou 221116
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Peebles C, Alvey PM, Lynch V, Iverson BL. Time-Dependent Solid State Polymorphism of a Series of Donor-Acceptor Dyads. CRYSTAL GROWTH & DESIGN 2014; 14:290-299. [PMID: 24678269 PMCID: PMC3963176 DOI: 10.1021/cg401522v] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In order to exploit the use of favorable electrostatic interactions between aromatic units in directing the assembly of donor-acceptor (D-A) dyads, the present work examines the ability of conjugated aromatic D-A dyads with symmetric side chains to exhibit solid-state polymorphism as a function of time during the solid formation process. Four such dyads were synthesized and their packing in the solid-state from either slower (10-20 days) or faster (1-2 days) evaporation from solvent was investigated using single crystal X-ray analysis and powder X-ray diffraction. Two of the dyads exhibited tail-to-tail (A-A) packing upon slower evaporation from solvent and head-to-tail (D-A) packing upon faster evaporation from solvent. A combination of single crystal analysis and XRD patterns were used to create models wherein a packing model for the other two dyads is proposed. Our findings suggest that while side chain interactions in asymmetric aromatic dyads can play an important role in enforcing segregated D-A dyad assembly, slowly evaporating symmetrically substituted aromatic dyads allows for favorable electrostatic interactions between the aromatic moieties to facilitate the organization of the dyads in the solid-state.
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Affiliation(s)
| | | | | | - Brent L. Iverson
- Correspondence should be addressed to Dr. Brent L. Iverson. ; Office phone: 512-471-5053
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Bag SS, Pradhan MK, Kundu R, Jana S. Highly solvatochromic fluorescent naphthalimides: Design, synthesis, photophysical properties and fluorescence switch-on sensing of ct-DNA. Bioorg Med Chem Lett 2013. [PMID: 23206865 DOI: 10.1016/j.bmcl.2012.11.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Das A, Molla MR, Maity B, Koley D, Ghosh S. Hydrogen-bonding induced alternate stacking of donor (D) and acceptor (A) chromophores and their supramolecular switching to segregated states. Chemistry 2012; 18:9849-59. [PMID: 22782621 DOI: 10.1002/chem.201201140] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2012] [Indexed: 11/10/2022]
Abstract
This paper reports comprehensive studies on the mixed assembly of bis-(trialkoxybenzamide)-functionalized dialkoxynaphthalene (DAN) donors and naphthalene-diimide (NDI) acceptors due the cooperative effects of hydrogen bonding, charge-transfer (CT) interactions, and solvophobic effects. A series of DAN as well as NDI building blocks have been examined (wherein the relative distance between the two amide groups in a particular chromophore is the variable structural parameter) to understand the structure-dependent variation in mode of supramolecular assembly and morphology (organogel, reverse vesicle, etc.) of the self-assembled material. Interestingly, it was observed that when the amide functionalities are introduced to enhance the self-assembly propensity, the mode of co-assembly among the DAN and NDI chromophores no longer remained trivial and was dictated by a relatively stronger hydrogen-bonding interaction instead of a weak CT interaction. Consequently, in a highly non-polar solvent like methylcyclohexane (MCH), although kinetically controlled CT-gelation was initially noticed, within a few hours the system sacrificed the CT-interaction and switched over to the more stable self-sorted gel to maximize the gain in enthalpy from the hydrogen-bonding interaction. In contrast, in a relatively less non-polar solvent such as tetrachloroethylene (TCE), in which the strength of hydrogen bonding is inherently weak, the contribution of the CT interaction also had to be accounted for along with hydrogen bonding leading to a stable CT-state in the gel or solution phase. The stability and morphology of the CT complex and rate of supramolecular switching (from CT to segregated state) were found to be greatly influenced by subtle structural variation of the building blocks, solvent polarity, and the DAN/NDI ratio. For example, in a given D-A pair, by introducing just one methylene unit in the spacer segment of either of the building blocks a complete change in the mode of co-assembly (CT state or segregated state) and the morphology (1D fiber to 2D reverse vesicle) was observed. The role of solvent polarity, structural variation, and D/A ratio on the nature of co-assembly, morphology, and the unprecedented supramolecular-switching phenomenon have been studied by detail spectroscopic and microscopic experiments in a gel as well as in the solution state and are well supported by DFT calculations.
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Affiliation(s)
- Anindita Das
- Polymer Science Unit, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Rd. Kolkata-700032, India
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Klivansky LM, Hanifi D, Koshkakaryan G, Holycross DR, Gorski EK, Wu Q, Chai M, Liu Y. A complementary disk-shaped π electron donor–acceptor pair with high binding affinity. Chem Sci 2012. [DOI: 10.1039/c2sc20241g] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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Bheemaraju A, Pourmand M, Yang B, Surampudi SK, Benanti TL, Achermann M, Barnes MD, Venkataraman D. Effect of Side Chains on Charge Transfer in Quaterthiophene-Naphthalene Diimide Based Donor-Bridge-Acceptor Dyads. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2011. [DOI: 10.1080/10601325.2011.620473] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Dong L, Li W, Li WS. Construction of a long range p/n heterojunction with a pair of nanometre-wide continuous D/A phases. NANOSCALE 2011; 3:3447-3461. [PMID: 21785797 DOI: 10.1039/c1nr10410a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A p/n heterojunction is the basic setup for light-electric conversion. It has been widely accepted that the ideal configuration for organic photovoltaics is formed by the joint of a pair of long-range continuous but nanometre-wide phases consisting of electron-donating (D) and -accepting (A) components, respectively. Such a p/n heterojunction can provide not only a large D/A interface essential to efficient photoinduced charge separation, but also the transportation pathways for both electrons and holes. This review article summarizes the present approaches including D-A double cables, diblock copolymers, and small molecular D-A dyads and multiads, to construct such an ideal p/n heterojunction. Each approach is introduced by a few selected representative works, with highlights on their molecular design strategies and the relationship of chemical structure-packing order-property. Such information would be useful for the next research in the field.
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Affiliation(s)
- Lei Dong
- Faculty of Material and Photoelectronic Physics, Xiangtan University, Xiangtan, Hunan 411105, P. R. China
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Programed self-assembly of microstructures: self-sorting based on size-matched disk-like molecules and remarkable cooperative reinforcement of hydrogen-bonding and donor–acceptor interaction. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.05.082] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Molla MR, Das A, Ghosh S. Self-sorted assembly in a mixture of donor and acceptor chromophores. Chemistry 2011; 16:10084-93. [PMID: 20583059 DOI: 10.1002/chem.201000596] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
A simple and novel supramolecular approach for orthogonal self-assembly of donor and acceptor chromophores has been demonstrated. Suitably designed 1,5-dialkoxynaphthalene (DAN) and naphthalene tetracarboxylic acid diimide (NDI) derivatives were used as the donor and acceptor systems, respectively. The molecular design for self-sorting relies upon the precise control over the placement of the self-complementary hydrogen-bonding units (amide functionality) with respect to the individual chromophore. By design, the distances between the two amide groups in the donor and acceptor chromophores are not identical, and consequently the effect of the hydrogen-bonding interaction cannot be maximised in the case of alternate donor-acceptor-type pi-stacking. Thus a relatively weak charge-transfer interaction is expected to be sacrificed, and segregated assembly among the individual chromophores should be enforced by virtue of the much stronger effects of hydrogen bonding and pi-pi stacking. Detailed spectroscopic studies were carried out to probe the mode of self-assembly in various derivatives of the DAN-NDI donor-acceptor pairs to establish the utility of the molecular design as a generalised one for orthogonal self-assembly.
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Affiliation(s)
- Mijanur Rahaman Molla
- Polymer Science Unit, Indian Association for the Cultivation of Science, 2A & B Raja S. C. Mullick Road, Kolkata, 700 032, India
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Molla MR, Das A, Ghosh S. Chiral induction by helical neighbour: spectroscopic visualization of macroscopic-interaction among self-sorted donor and acceptor π-stacks. Chem Commun (Camb) 2011; 47:8934-6. [DOI: 10.1039/c1cc11178g] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Das A, Ghosh S. A generalized supramolecular strategy for self-sorted assembly between donor and acceptor gelators. Chem Commun (Camb) 2011; 47:8922-4. [DOI: 10.1039/c1cc12915e] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Polyamines. IV. Spectroscopic properties of N,N-bis-(1,8-naphthalenedicarboximidopropyl)-N-propylamine and supramolecular interactions in its crystals. J Mol Struct 2010. [DOI: 10.1016/j.molstruc.2010.06.020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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