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Photochemische Umwandlungen. XXXVIII [1]. Synthese und Eigenschaften Methoxycarbonyl-substituierter «Quadricyclanone»
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In this article, the three methoxycarbonyl-substituted quadricyclanones 7a, 7b and 7c have been synthesized in good to excellent yields.Abstract:
The three methoxycarbonyl-substituted quadricyclanones 7a, 7b and 7c have been synthesized in good to excellent yields. Some of their physical (UV., NMR.) and chemical properties (e.g. condensation and pyrolysis reactions) are discussed.read more
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Photochemische Umwandlungen, 45. Mitteilung [1] die 3σ → 3π‐route zu oxepin‐derivaten
TL;DR: In this article, an oxepin synthesis from furanes and acetylenic dienophiles via Diels-Alder reaction (4a), photochemical oxanorbornadiene-oxaquadricyclane transformation (4b), and thermal 3σ 3π opening of the highly strained oxaquadiene 5a was described.
Journal ArticleDOI
Generation of Carbenes by Thermal Cycloelimination
TL;DR: In this article, the advantages of carbene generation by thermal cycloelimination are demonstrated with reference to dialkoxycarbenes, which are very difficult to obtain in any other way.
Journal ArticleDOI
Studien im Umfeld funktionalisierter/anellierter acs-Tetracyclo[7.2.1.04,11.06,10]dodeca-2,7-dien-Gerüste — Röntgenstrukturanalysen einer „face-to-face”︁-Dibenzoverbindung und eines Tetraoxadihydro-pagodans
Gottfried Sedelmeier,Wolf-Dieter Fessner,Rolf Pinkos,C. Grund,Bulusu A. R. C. Murty,Dieter Hunkler,Grety Rihs,Hans Fritz,Carl Krüger,Horst Prinzbach +9 more
TL;DR: In this paper, X-ray structural analyses together with MM2 calculations for the dibenzo compound 54 and for the tetraoxadihydropagodane 64 (a [4]peristylane) derived from 63, are provided.
Journal ArticleDOI
Quadricyclanes. Part II: Electronic structure and chemical reactivity
TL;DR: The electronic structure of 3-heteroquadricyclane and 3-methylidene quadric yclane obtained by photoelectron spectroscopy is used as a basis for the discussion of cycloadditions to these systems as discussed by the authors.
References
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Catalysis of symmetry-restricted reactions by transition metal compounds. Valence isomerization of cubane
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Photochemical transformations—VIII: The isomerization of Δ2,5-bicyclo[2.2.1]heptadiene to quadricyclo[2.2.1.02,6·03,5]heptane (quadricyclene)☆☆☆★
TL;DR: In this article, the valence tautomeric quadricyclene (IV) was studied with hydrogen, with acetic acid and with bromine, and it was shown that IV can be reformulated with hydrogen.
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Molecular orbital symmetry conservation in transition metal catalyzed transformations
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Valence isomerization of quadricyclene to norbornadiene catalyzed by transition metal complexes
H. Hogeveen,H. C. Volger +1 more
Journal ArticleDOI
Proton Magnetic Resonance Spectra of Cyclopropane Derivatives
John D. Graham,Max T. Rogers +1 more
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