Zobrazeno 1 - 10 of 95 pro vyhledávání: '"Dieter Wege"'
1
Synthesis, Chemistry and Structure of Some 1,1-Dimethylcyclopropazulenes
Autor: Allan H. White, Brian W. Skelton, Alan D. Payne, Dieter Wege
Publikováno v: ChemistrySelect. 1:5339-5346
1,1-Dimethylcycloprop[e]azulene and 1,1-dimethylcycloprop[f]azulene derivatives were prepared through a short synthesis from thiophene-1,1-dioxides using a Houk-Leaver azulene synthesis. The strain caused by the fusion of the cyclopropane ring had no
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e22cadb2813a2ecceea64453f303a4e6
https://doi.org/10.1002/slct.201601168
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3
Tautomerism in acyl-pyrazolones and in a novel photolysis product—importance and impact of the accurate localization of hydrogen atoms in crystal structures
Autor: Lorraine A. Malaspina, Simon Grabowsky, Michael B. Tolmie, Brian W. Skelton, Dieter Wege, Allan H. White
Publikováno v: Malaspina, Lorraine A.; White, Allan H.; Wege, Dieter; Tolmie, Michael B.; Skelton, Brian W.; Grabowsky, Simon (2017). Tautomerism in acyl-pyrazolones and in a novel photolysis product—importance and impact of the accurate localization of hydrogen atoms in crystal structures. Structural chemistry, 28(5), pp. 1343-1357. Springer 10.1007/s11224-017-1005-0
Acyl-pyrazolones exist in four different tautomeric forms (two keto and two enol) in crystal structures. Routine crystal structure refinements using an independent atom model and routine isolated-molecule calculations fail in locating the mobile hydr
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9f95d3a3c8cecf8e2d4d5359f6dcaddf
https://boris.unibe.ch/138430/1/046_Malaspina2017_StructChem.pdf
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4
The synthesis of 3-hydroxymethylfuro[3,2-b]naphtho[2,3-d]furan-5,10-dione, a novel metabolite isolated from Crescentia cujete
Autor: Riskiono Slamet, Linda B. Nielsen, Dieter Wege
Publikováno v: Tetrahedron. 65:4569-4577
The title natural product 1 , which possesses a new ring skeleton, has been synthesised by a sequence in which the key steps involve a tandem intramolecular Diels–Alder/reverse Diels–Alder reaction sequence. Thus 3-(2-furyl)-1,4-dimethoxynaphthal
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6afe9d8a0bab2cae05ed2c06d8d73c7f
https://doi.org/10.1016/j.tet.2009.03.091
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5
Preparation of isobenzofurandiones by flash vacuum pyrolysis involving retro-Diels–Alder expulsion of ethylene and concomitant C–O cleavage of methoxy or ethylenedioxy groups
Autor: Dieter Wege, Riskiono Slamet
Publikováno v: Tetrahedron. 63:12621-12628
Flash vacuum pyrolysis (fvp) of a number of substrates, prepared by hydrogenating adducts derived from dimethoxy- or ethylenedioxy-substituted benzynes and furan, affords isobenzofurandiones through retro-Diels–Alder expulsion of ethylene and C–O
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::97bc4f2e314482b779f58e099c8b2acc
https://doi.org/10.1016/j.tet.2007.10.020
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6
Approaches to Cyclopropazulenes: Transannular Aldol Reactions of Some Derivatives of 1,10-Dibromobicyclo[8.1.0]undecane-3,8-dione
Autor: Brian W. Skelton, Allan H. White, Dieter Wege, Alan D. Payne
Publikováno v: European Journal of Organic Chemistry. 2007:1184-1195
This paper describes synthetic approaches to potential precursors to cyclopropazulenes, a novel class of nonbenzenoid cycloproparenes. The acid-catalysed transannular aldol reaction of 1,10-dibromobicyclo[8.1.0]undecane-3,8-dione (10) gives a single
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a3124cfa397a3dcc5e6e50111ccb6d7a
https://doi.org/10.1002/ejoc.200600893
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7
Synthesis of 5,8-dimethoxynaphtho[2,3-c]furan-4(9H)-one
Autor: Matthew J. Piggott, Dieter Wege
Publikováno v: Tetrahedron. 62:3550-3556
The synthesis of the title compound, which shares its skeleton with a number of biologically active natural products, is described. The key steps are construction of a 3,4-disubstituted furan by a tandem Diels–Alder-retro-Diels–Alder reaction of
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e328b58fda8c0b8c20d083138b04e6fa
https://doi.org/10.1016/j.tet.2006.01.096
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8
Iron and transition metal transport into erythrocytes mediated by nifedipine degradation products and related compounds
Autor: Mark L.H Meesters, Dieter Wege, Evan H. Morgan, Garth S Cliff, Donna L. Savigni
Publikováno v: Biochemical Pharmacology. 65:1215-1226
The aim of this investigation was to determine the mechanism of action of the nitrosophenylpyridine derivative of nifedipine ("nitrosonifedipine", NN) on Fe(II) transport into erythrocytes. Nifedipine is rapidly degraded to NN by daylight. We used ra
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::752ccb45610723762d734552cb6b77a0
https://doi.org/10.1016/s0006-2952(03)00045-5
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10
ChemInform Abstract: A,B-Diheteropentalenes by a Tandem Intramolecular Diels-Alder/Reverse Diels-Alder Reaction Sequence. Application to the Synthesis of Thieno( 3,4-b)furan
Autor: J. Moursounidis, J. H. Buttery, Dieter Wege
Publikováno v: ChemInform. 26
Alkylation of 2-furylmethanethiol (28) with propargyl chloride gave the thioether (22) which on methoxycarbonylation afforded the acetylenic ester (30). On heating, this material underwent an intramolecular Diels -Alder reaction to give the tricyclic
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5f5c693af5745e6daaabc0fa68352eec
https://doi.org/10.1002/chin.199529132
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