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Briling KR, Laikov DN. Heptalene Synthesis by Addition of Aryl Acetylenes to
Azulenes. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2020. [DOI: 10.1134/s1070428020040028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Hansen HJ, Ostaszewski R. Oxidative 1,1’-Coupling of Highly Alkylated 2-Methoxycarbonylazulenes. HETEROCYCLES 2015. [DOI: 10.3987/com-14-s(s)82] [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]
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Landmesser T, Linden A, Hansen HJ. From Blue Azulenes to Blue Heptalenes - New Strongly Polarizedπ-Convertible Heptalenes. Helv Chim Acta 2013. [DOI: 10.1002/hlca.201300138] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Uebelhart P, Weymuth C, Linden A, Hansen HJ. Benzo[a]heptalenes from Heptaleno[1,2-c]furans. Part 2. Helv Chim Acta 2007. [DOI: 10.1002/hlca.200790069] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Abstract
The amplification of molecular chirality by liquid crystalline systems is widely applied in investigations towards enantioselective solvent-solute interactions, chiral supramolecular assemblies, smart materials, and the development of liquid crystal displays. Here we present an overview of recent achievements in the development of new chiral dopant systems for the generation of cholesteric liquid crystalline phases. Based on a distinction between shape-persistent and bistable dopants, several dopant classes will be discussed.
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Affiliation(s)
- Rienk Eelkema
- Department of Organic Chemistry, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
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Uebelhart P, Weymuth C, Hansen HJ. Benzo[a]heptalenes from Heptaleno[1,2-c]furans. Part I. Helv Chim Acta 2005. [DOI: 10.1002/hlca.200590105] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Bernhard W, Brügger P, Daly JJ, Englert G, Schönholzer P, Hansen HJ. σ-Skeletal-Rearrangement of Heptalenes: Thermal Transformation of Heptalene-1,2-dicarboxylates into Heptalene-1,3-dicarboxylates. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19850680427] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Weber RH, Brügger P, Jenny TA, Hansen HJ. Light-Induced, Thermal, and Acid-Catalyzed π-Skeletal Rearrangements of Five-Ring-Annelated Heptalenes. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19870700323] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Light-Induced and Thermal π-Skeletal Rearrangement of Heptalenes with Retention of Configuration. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19850680216] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Weber RH, Brügger P, Arnold W, Schönholzer P, Hansen HJ. Formation of Cyclic ‘ortho’-Anhydrides of Heptalene-1,2-dicarboxylic Acids. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19870700602] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Singh G, Linden A, Abou-Hadeed K, Hansen HJ. New Products from the Heptalene-Forming Reaction of Azulenes and Acetylenedicarboxylates in Polar Media. Helv Chim Acta 2002. [DOI: 10.1002/1522-2675(200201)85:1<27::aid-hlca27>3.0.co;2-f] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Abou-Hadeed K, Hansen HJ. A ?One-Pot? Anellation Method for the Transformation of Heptalene-4,5-dicarboxylates into Benzo[a]heptalenes. Helv Chim Acta 1997. [DOI: 10.1002/hlca.19970800821] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Abe N, Chijimatsu H, Kondo S, Watanabe H, Saito K. Reactions of Azulene and 2-Aminoazulene Derivatives with Isocyanates, Ketenes and Nitrile Oxides. JOURNAL OF CHEMICAL RESEARCH 1997. [DOI: 10.1039/a703817h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Briquet AAS, Uebelhart P, Hansen HJ. Double-Bond Shifts in [4n]Annulenes as a New Principle for Molecular Switches: First Results with Dimethyl Heptalene-1,2- and -4,5-dicarboxylates. Helv Chim Acta 1996. [DOI: 10.1002/hlca.19960790819] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Fallahpour RA, Hansen HJ. Formation and Thermal Rearrangement of Dimethyl Tricyclo[6.2.2.01,7]dodeca-2,4,6,9,11-pentaene-9,10-dicarboxylates. Helv Chim Acta 1995. [DOI: 10.1002/hlca.19950780805] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Fallahpour RA, Hansen HJ. Synthesis of an Isotopically Isomeric Mixture of 1,4,6,8-Tetramethyl[13C2]azulene and Its Thermal Reaction with Dimethyl Acetylenedicarboxylate. Helv Chim Acta 1995. [DOI: 10.1002/hlca.19950780604] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Fallahpour RA, Sigrist R, Hansen HJ. Reaction of Hydroxymethyl- and Alkyl-Substituted Azulenes with Manganese Dioxide. Helv Chim Acta 1995. [DOI: 10.1002/hlca.19950780603] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Uebelhart P, Mohler P, Fallahpour RA, Hansen HJ. Formation of Heptaleno[1,2-c]furans and Heptaleno[1,2-c]furanones. Helv Chim Acta 1995. [DOI: 10.1002/hlca.19950780605] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Kouroupis P, Hansen HJ. From Colchicine and Some of Its Derivatives to 1,2,3,9,10-Pentamethoxybenzo[a]heptalenes. Helv Chim Acta 1995. [DOI: 10.1002/hlca.19950780517] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Briquet AAS, Hansen HJ. Thermal and Ru-catalyzed Reactions of Styryl-Substituted Azulenes with Dimethyl Acetylenedicarboxylate. Helv Chim Acta 1994. [DOI: 10.1002/hlca.19940770723] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Rippert AJ, Hansen HJ. Synthesis and Chiroptical Properties of Dimethyl 8,12-Diphenylbenzo[d]heptalene-6,7-dicarboxylate. Helv Chim Acta 1993. [DOI: 10.1002/hlca.19930760814] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Magnussen A, Uebelhart P, Hansen HJ. Thermal Reaction of Azulene-1-carbaldehydes with Dimethyl Acetylenedicarboxylate. Helv Chim Acta 1993. [DOI: 10.1002/hlca.19930760813] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Chen Y, Hansen HJ. Thermal Reaction of Azulene and Some of Its Symmetrically Substituted Methyl Derivatives with Dimethyl Acetylenedicarboxylate. Helv Chim Acta 1993. [DOI: 10.1002/hlca.19930760111] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Uebelhart P, Hansen HJ. Thermal Reactions of Guaiazulene and Its 3-Methyl Derivative with Dimethyl Acetylenedicarboxylate. Helv Chim Acta 1992. [DOI: 10.1002/hlca.19920750804] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Chen Y, Kunz RW, Uebelhart P, Weber RH, Hansen HJ. Thermal Reaction of Highly Alkylated Azulenes with Dimethyl Acetylenedicarboxylate: HOMO(Azulene)vs. SHOMO(Azulene) Control in the Primary Thermal Addition Step. Helv Chim Acta 1992. [DOI: 10.1002/hlca.19920750803] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Rippert AJ, Hansen HJ. Ru-Catalyzed Heptalene Formation from Azulenes and Dimethyl Acetylenedicarboxylate. Helv Chim Acta 1992. [DOI: 10.1002/hlca.19920750707] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Marty W, Pasquier ML, Gampp H. Horeau's Coupling of Enantiomers Revisited. The Reversible Coupling of Enantiomers to Form Diastereoisomers in Kinetically Labile Metal Complexes. Helv Chim Acta 1987. [DOI: 10.1002/hlca.19870700713] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Hafner K, Knaup GL, Lindner HJ. Synthese und dynamische Eigenschaften substituierter Cyclohepta[ef]heptalene. Angew Chem Int Ed Engl 1986. [DOI: 10.1002/ange.19860980722] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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