Journal ArticleDOI
Inapplicability of the “exo rule” to the 1,3-dipolar cycloadditions to norbornadienes
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In this article, it was shown that 1,3-dipolar cycloadditions to norbornadienes do not follow the exo rule of Alder and Stein.Abstract:
1,3-Dipolar cycloadditions of phenylglyoxylonitrile oxide, benzonitrile-N-phenylimine, or N-phenyl-C-p-nitrophenylnitrone to norbornadiene and 2,3-disubstituted norbornadienes gave the endo-adducts together with the exo-adducts. These observations show that 1,3-dipolar cycloadditions to norbornadienes do not follow the “exo rule” of Alder and Stein.read more
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The origin of regio- and stereoselectivity in the 1,3-dipolar cycloaddition of nitrile oxides with C1-substituted 7-oxabenzonorbornadienes, a DFT study
TL;DR: In this article, density functional theory (DFT) calculations were performed in order to achieve a deep understanding of the regio- and stereoselectivity of 1,3-dipolar cycloadditions.
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Isoquinolinium n-arylimides and strained cycloalkenes
Robert Temme,Rolf Huisgen +1 more
TL;DR: In contrast to common alkenes and enol ethers, the angle-strained double bonds of norbornene, dimethyl norbornadiene-2,3-dicarboxylate, and acenaphthylene undergo [3+2] cycloadditions with isoquinolinium N-arylimides as discussed by the authors.
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Reaktionen o-chinoider verbindungen mit quadricyclanen-II: Umsetzung dbs 7-acetoxyquadricyclans mit tetrachlor-o-benzochinon
TL;DR: Zusammenfassung Tetrachlor-o-benzochinon (1) reagiert mit 7-Acetoxyquadricyclan (3) als Heterodien unter Bildung von4 und5 and als elektronenarme Monocarbonylverbindung unter textured images as mentioned in this paper, und 1:2-Addukte (8, 9) isoliert, die wahrscheinlich aus einem primar gebildeten Homodien
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Diphenyl-nitrilimin und seine 1.3-dipolaren additionen an alkene und alkine
TL;DR: In this paper, the noch nicht bekannte Diphenyl-nitrilimin wird durch N2-Abspaltung aus 2.5-Diphenyltetrazol bei 160° or aus Benz-phenylhydrazid-chlorid with Triathylamin bei 20-80° bereitet.
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Analysis of the Nuclear, Magnetic Resonance Spectra of Norbornene Derivatives
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