1,2,4-Trioxane in organic synthesis. Unusual entry to diverse carbocyclic frameworks derived from β-ionone
摘要:
Synthesis of [4.4.0]- or [5.3.0]-bicyclic frameworks was achieved via sequential intramolecular Michael/aldol and tandem intramolecular adol/aldol strategies, starting from acyclic precursors derived from beta-ionone. (C) 2003 Elsevier Ltd. All rights reserved.
1,2,4-Trioxane in organic synthesis. Unusual entry to diverse carbocyclic frameworks derived from β-ionone
摘要:
Synthesis of [4.4.0]- or [5.3.0]-bicyclic frameworks was achieved via sequential intramolecular Michael/aldol and tandem intramolecular adol/aldol strategies, starting from acyclic precursors derived from beta-ionone. (C) 2003 Elsevier Ltd. All rights reserved.
Photochemical reactions. 147th Communication. Further investigation of the photochemistry of 5,6-epoxy-5,6-dihydro-?-ionone: Product formationvia a carbonyl-ylide intermediate
作者:Anthony O'Sullivan、Bruno Frei、Oskar Jeger
DOI:10.1002/hlca.19860690305
日期:1986.5.7
On π,π*-excitation of the epoxyenone (E)-1 (λ = 254 nm, MeCN), in addition to the previously isolated compounds 2–9, the new products 10–12, derived from the ylide intermediate c were isolated. Further evidence for the ylide c was obtained by the rapid racemization of the optically active epoxyenone (−)-(E)-1.
Farbstoffsensibilisierte Photoreaktionen von vinylogen Epoxycarbonylverbindungen
作者:Werner Skorianetz、G�nther Ohloff
DOI:10.1002/hlca.19730560704
日期:1973.11.7
On irradiation in the presence of dye sensitizers, vinylogous epoxy carbonyl compounds undergo a novel photofragmentation reaction, to give furyl ketones in good yields. The fragmentation process is probably preceded by trans-cis isomerization of the double bond; in one case the cis-isomer could be isolated. In a side reaction epoxyenone 10 gives the cyclopentanone derivatives 13 and 14 by a [1, 2]
Chemistry of 1,2,4-Trioxanes: Metal-Induced Deoxygenation and Rearrangement of the 1,2,4-Trioxane Obtained by Photooxidation of β-Ionone
作者:Mirta Mischne
DOI:10.1055/s-2002-33637
日期:——
The reactivity of 2,2,6,8-tetramethyltricyclo(6.2.2.01,6)dodecene (2) toward different metal salts has been explored. In the presence of Fe(II), Sn(II) and Ce(IV) ions, compound 2 underwent a rearrangement process to afford acyclic triketones Z-3 and E-3. The action of Zn powder in acetic acid resulted in an unexpected formation of furan 4 in high yield.
Photochemische Reaktionen 122. Mitteilung [1]. Zur vinylogen ?-spaltung von epoxy-enonen: Photoisomerisierung des 3,4:5,6-diepoxy-5,6-dihydro-?-jonons
作者:Norbert Bischofberger、Guy De Weck、Bruno Frei、Hans Richard Wolf、Oskar Jeger
DOI:10.1002/hlca.19810640606
日期:1981.9.23
Vinylogous β-Cleavage of Epoxy-enones: Photoisomerization of 3,4: 5,6-Diepoxy-5,6-dihydro-β-ionone
环氧烯类化合物的乙烯基β裂解:3,4:5,6-二环氧-5,6-二氢-β-紫罗兰酮的光异构化
Photochemische Reaktionen. 73. Mitteilung. Neuartige Photoreaktionen des (�)-trans-?-Jonon-epoxids
作者:Beat R. von Wartburg、Hans R. Wolf、Oskar Jeger
DOI:10.1002/hlca.19730560615
日期:1973.7.18
The racemic trans-β-ionone-epoxide (7) upon irradiation with light of wavelength 254 nm (in pentane solution) gives rise to novel photochemical processes and formation of compounds 12, 13, 14, and 15.