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Maillefer-El Houar S, Uebelhart P, Linden A, Hansen HJ. Synthesis and Characterization of New Heptalenes with Extendedπ-Systems Attached to Them. Helv Chim Acta 2013. [DOI: 10.1002/hlca.201300137] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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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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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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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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Bernhard W, Brügger P, Daly JJ, Schönholzer P, Weber RH, Hansen HJ. First Optically Active Heptalenes and their Absolute Configuration. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19850680215] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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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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11
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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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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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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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20
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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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22
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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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Hafner K, Knaup GL, Lindner HJ. Syntheses and Dynamic Behavior of Chiral Heptalenes. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1988. [DOI: 10.1246/bcsj.61.155] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [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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