Zobrazeno 1 - 10
of 97
pro vyhledávání: '"Peter Bubenitschek"'
Autor:
Peter Bubenitschek, Ludger Ernst, Peter G. Jones, Henning Hopf, Birte Ahrens, Sonja Margaretha Ramm
Publikováno v:
European Journal of Organic Chemistry. 2008:2948-2959
Tropylidenes 16 and 17 were prepared from [2.2]paracyclophane (10). On treatment with the corresponding trityl salts they were converted into tropyliophanes 26a (tetrafluoroborate) and 26b (perchlorate). With acetone, 26a furnished trapping product 2
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b7023ef09dc036778ed399fe2a0b9449
https://doi.org/10.1002/ejoc.200800171
https://doi.org/10.1002/ejoc.200800171
Publikováno v:
Liebigs Annalen. 1996:1301-1311
The two 2,3-diethynyl-1,3-butadiene derivatives 1b and 1c were prepared from 2,3-dichloro-1,3-butadiene (26) and the Grignard reagents 19b and 19c by Kumada coupling. Desilylation of 1b provided the parent molecule 1a. The title compounds were used f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::14e1014c96d8c789f9eaf384e9d56f45
https://doi.org/10.1002/jlac.199619960810
https://doi.org/10.1002/jlac.199619960810
Autor:
Jean-Pierre Desvergne, Henri Bouas-Laurent, Peter G. Jones, Helmut Greiving, Peter Bubenitschek, Henning Hopf
Publikováno v:
European Journal of Organic Chemistry. 2005:558-566
In preceding papers, cinnamophanes 1a–d (two cinnamic ester units locked in a [2.2]paracyclophane skeleton) were described. In particular, the pseudo-gem isomer 1a was shown to produce in solution an intramolecular cyclobutane photocycloadduct with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1e07c76d707fdf29f10b9be8acf6853a
https://doi.org/10.1002/ejoc.200400592
https://doi.org/10.1002/ejoc.200400592
Publikováno v:
European Journal of Organic Chemistry. 2002:1708-1721
The cross-conjugated 1,1-diethynylethylene derivatives 8b−10b were prepared from the corresponding bromides 16, 19, and 17 by Sonogashira coupling with trimethylsilylethyne and hydrolysis of the TMS-protected intermediates thus formed. Coupling of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5d0cb7fdb0a4adc0c556655fb0489f30
https://doi.org/10.1002/1099-0690(200205)2002:10<1708::aid-ejoc1708>3.0.co
https://doi.org/10.1002/1099-0690(200205)2002:10<1708::aid-ejoc1708>3.0.co
Publikováno v:
Tetrahedron. 56:8665-8668
The strained propellane 5 is efficiently synthesized from 3 in three reaction steps including epoxidation, organometallic arylation and final cyclization by intramolecular Friedel–Crafts alkylation.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a5efbec48731c5a0276419acb7400788
https://doi.org/10.1016/s0040-4020(00)00784-5
https://doi.org/10.1016/s0040-4020(00)00784-5
Publikováno v:
Acta Crystallographica Section E Structure Reports Online. 62:o1480-o1482
The title compound, C12H22Br2, displays crystallographic inversion symmetry. Bond lengths C=C = 1.352 (4) Å and Csp 2—Csp 3 = 1.574 (3) Å are interpreted as symptoms of steric overcrowding. Molecules are linked into chains parallel to [101] by Br
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eab95b7037240cc9736085fd1b83f046
https://doi.org/10.1107/s1600536806009627
https://doi.org/10.1107/s1600536806009627
Publikováno v:
Journal of the Chemical Society, Perkin Transactions 1. :1163-1166
The annelated barrelene 8 is easily accessible in a three-step reaction procedure from simple starting materials. An intermolecular palladium-catalysed arylation at the strained tetrasubstituted double bond of the barrelene finally leads to polycycli
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::73e462715a37ffd1d064d4b24b78551c
https://doi.org/10.1039/a606857j
https://doi.org/10.1039/a606857j
Publikováno v:
Liebigs Annalen. 1997:203-209
Areno-anellated [3.3.n]propellanes with n = 2, 3, and 4 are easily accesible by palladium-catalyzed domino coupling processes of the pentalene system 8 with various aryl iodides. The X-ray structure investigations reveled a noteworthy elongation of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1033c75b55caa7f27a318ab1c64b386c
https://doi.org/10.1002/jlac.199719970129
https://doi.org/10.1002/jlac.199719970129
Publikováno v:
Acta Crystallographica Section E Structure Reports Online. 61:o957-o959
In the title compound, 2C30H18·3C12H4N4, the asymmetric unit consists of half a formula unit (one quinodimethane molecule displays inversion symmetry). There is no ring stacking; instead, the residues associate by weak C—H⋯N contacts in planes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1795437ad6790ab8012a9de0443069df
https://doi.org/10.1107/s1600536805007142
https://doi.org/10.1107/s1600536805007142
Publikováno v:
Tetrahedron. 52:14777-14786
Diels-Alder reactions of the annelated pentalene 2 lead to [4.3.3]propellanes. Various substituted anthracenes 3 and cyclopentadienes 5 are tested as diene components. 2 may be classified as a rather electron-rich dienophile.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b37c52f786d1f9f4ec31c9ed27484035
https://doi.org/10.1016/0040-4020(96)00943-x
https://doi.org/10.1016/0040-4020(96)00943-x