ChemInformVolume 20, Issue 8 Physical Organic Chemistry ChemInform Abstract: Stereochemistry of 2,6-Dichloro-4-methoxy-heptanes R. MEUSINGER, R. MEUSINGER Sekt. Chem., Karl-Marx-Univ. Leipzig, DDR-7010 LeipzigSearch for more papers by this authorC. DUSCHEK, C. DUSCHEK Sekt. Chem., Karl-Marx-Univ. Leipzig, DDR-7010 LeipzigSearch for more papers by this authorE. KLEINPETER, E. KLEINPETER Sekt. Chem., Karl-Marx-Univ. Leipzig, DDR-7010 LeipzigSearch for more papers by this authorR. BORSDORF, R. BORSDORF Sekt. Chem., Karl-Marx-Univ. Leipzig, DDR-7010 LeipzigSearch for more papers by this authorK. PIHLAJA, K. PIHLAJA Sekt. Chem., Karl-Marx-Univ. Leipzig, DDR-7010 LeipzigSearch for more papers by this authorJ. MATTINEN, J. MATTINEN Sekt. Chem., Karl-Marx-Univ. Leipzig, DDR-7010 LeipzigSearch for more papers by this author R. MEUSINGER, R. MEUSINGER Sekt. Chem., Karl-Marx-Univ. Leipzig, DDR-7010 LeipzigSearch for more papers by this authorC. DUSCHEK, C. DUSCHEK Sekt. Chem., Karl-Marx-Univ. Leipzig, DDR-7010 LeipzigSearch for more papers by this authorE. KLEINPETER, E. KLEINPETER Sekt. Chem., Karl-Marx-Univ. Leipzig, DDR-7010 LeipzigSearch for more papers by this authorR. BORSDORF, R. BORSDORF Sekt. Chem., Karl-Marx-Univ. Leipzig, DDR-7010 LeipzigSearch for more papers by this authorK. PIHLAJA, K. PIHLAJA Sekt. Chem., Karl-Marx-Univ. Leipzig, DDR-7010 LeipzigSearch for more papers by this authorJ. MATTINEN, J. MATTINEN Sekt. Chem., Karl-Marx-Univ. Leipzig, DDR-7010 LeipzigSearch for more papers by this author First published: February 21, 1989 https://doi.org/10.1002/chin.198908061Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat No abstract is available for this article. Volume20, Issue8February 21, 1989 RelatedInformation

AbstractAfter estimation of the coordination geometry Eu...O for (Ia), the ground state conformations of the Eu(fod)3 coordinated substrates (Ib)‐(Id) are determined, which in the cases (Ib) and (Ic) are significantly different from those of the free substrates (the LIS method is therefore not applicable).

The diastereomers of a series of substituted γ‐chloropropyl methyl ethers with up to three chiral centres have been assigned by 1H/13C NMR spectroscopy from vicinal H,H coupling constants and the steric compression within the carbon skeleton (γ‐gauche effect). The necessary conformational study was carried out with the help of theoretically estimated steric 1,3‐parallel interaction energies.

Conformational Investigations by Means of 13CN.M.R. Spectroscopy. I. Preferential Conformation of Alkyl Substituted Di‐ and Tetrahydropyranes (Rose Oxides and Related Compounds)The 13C‐n.m.r.‐spectra of a series 2‐ and 2,4‐alkylsubstituted di‐ and tetrahydro‐pyranes 1–5 are submitted and discussed with reference to the preferential conformation of the compounds in dependence on the arrangement of the substituents. In this connection the 13C‐chemical shifts of the carbon atoms C‐6 and the 4‐methyl group are very valuable indicators. Trans‐rose oxide prefers the conformation with equatorial 2‐substituent and axial 4‐methyl group.

Reactions of Bis‐enamines with Aldehydes ‐ New Synthesis of 1,3‐Oxazines and PyridinesIn the presence of phosphoric acid N‐alkyl‐dipropenylamines react with aliphatic aldehydes to form substituted 1,3‐oxazines. With benzaldehyde this reaction does not proceed, but azomethines are formed. N,N‐dipropenylaniline with aldehydes also gives azomethines, a dihydropyridine is formed as well. From tripropenylamine and aldehydes substituted pyridines are obtained.

Studies on the Sulphochlorination of Paraffins. III. 1 H- and 13 C-N.M.R. Spectra of Aliphatic and Cycloaliphatic Mono- and Disulphonylchlorides Isomeric monosulphonylchlorides of propane, butane, and heptane as well as disulphonylchlorides of propane, butane, and pentane are measured 1 H- and 13 C-n.m.r.-spectroscopically. Including several other aliphatic and cycloaliphatic sulphonylchlorides, the use of n.m.r. spectroscopy to identification and estimation of the composition of mono- and disulphonylchloride mixtures is discussed.

Diels-Alder Reactions. VII. The Isomerization of 2-Vinylbicyclo[2,2,1]hept-5-ene The isomerization of exo/endo-2-vinylbicyclo[2,2,1]-hept-5-ene in the presence of Na/Al 2 O 3 rapidly gives the thermodynamic equilibrium between exo- and endo-2-vinylbicyclo-[2,2,1]hept-5-ene and cis- and trans-2-ethylidenbicyclo[2,2,1]-hept-5-ene. Far more slowly vinylnortricyclene is formed, which enriches to an equilibrium concentration of about 75% at 60°C. The dependence of equilibrium constants of isomerization on temperature allows the calculation of enthalpies and entropies of isomerization.

Chemischer InformationsdienstVolume 7, Issue 11 Preparative Organic Chemistry ChemInform Abstract: DETECTION OF ANTI-MARKOVNIKOV PRODUCTS IN THE ACETOXYCHLORINATION OF 1-ALKENES CH. BRAEUNIG, CH. BRAEUNIGSearch for more papers by this authorCH. DUSCHEK, CH. DUSCHEKSearch for more papers by this authorH. FIEDLER, H. FIEDLERSearch for more papers by this authorM. HAMPEL, M. HAMPELSearch for more papers by this authorW. PRITZKOW, W. PRITZKOWSearch for more papers by this authorH. SCHMIDT, H. SCHMIDTSearch for more papers by this author CH. BRAEUNIG, CH. BRAEUNIGSearch for more papers by this authorCH. DUSCHEK, CH. DUSCHEKSearch for more papers by this authorH. FIEDLER, H. FIEDLERSearch for more papers by this authorM. HAMPEL, M. HAMPELSearch for more papers by this authorW. PRITZKOW, W. PRITZKOWSearch for more papers by this authorH. SCHMIDT, H. SCHMIDTSearch for more papers by this author First published: March 16, 1976 https://doi.org/10.1002/chin.197611143Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat No abstract is available for this article. Volume7, Issue11March 16, 1976 RelatedInformation

AbstractBei den Oxidation von Norbornen und seinen Derivaten (I) mit molekularem Sauerstoff entstehen als Hauptprodukte die exo‐Epoxide (II).

Chemischer InformationsdienstVolume 6, Issue 35 Preparative Organic Chemistry ChemInform Abstract: INTRAMOLEKULARE C-C-VERKNUEPFUNG VON DIENEN DURCH BASENKATALYSE 2. MITT. ISOMERISIERUNG VON ALLYLVERBINDUNGEN CH. DUSCHEK, CH. DUSCHEKSearch for more papers by this authorW. HOEBOLD, W. HOEBOLDSearch for more papers by this authorR. NAICK, R. NAICKSearch for more papers by this authorH. SCHMIDT, H. SCHMIDTSearch for more papers by this authorN. T. YEN, N. T. YENSearch for more papers by this author CH. DUSCHEK, CH. DUSCHEKSearch for more papers by this authorW. HOEBOLD, W. HOEBOLDSearch for more papers by this authorR. NAICK, R. NAICKSearch for more papers by this authorH. SCHMIDT, H. SCHMIDTSearch for more papers by this authorN. T. YEN, N. T. YENSearch for more papers by this author First published: September 2, 1975 https://doi.org/10.1002/chin.197535095Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat No abstract is available for this article. Volume6, Issue35September 2, 1975 RelatedInformation

AbstractBei der "Reaktion von Cyclohexadien‐(1,3) mit Äthylen in Gegenwart eines Ni‐Katalysators [z. B. Ni(II)‐Verbindung/Triarylphosphin/Triäthylaluminium/Diäthylaluminiumbromid] entsteht primär 3‐Vinyl‐cyclohexen (I), das unter dem Einfluß des Katalysatorsystems ein Gemisch von Folgeprodukten mit den Addukten (II)‐(IV) und den Isomeren (V) und (VI) als Hauptprodukten bildet.

AbstractDie Addition von Chlor an 24 Olefine verschiedener Struktur wurde in Methanol als Lösungsmittel bei etwa −70°C nach der Methode der Konkurrenzreaktion kinetisch untersucht. Um eine radikalische Reaktion auszuschließen, wurde in Gegenwart von Sauerstoff und unter Lichtausschluß gearbeitet.Die relativen Reaktionsgeschwindigkeiten der 22 untersuchten offenkettigen aliphatischen Olefine lassen sich befriedigend mit der dreiparametrigen und der fünfparametrigen TAFT‐Gleichung korrelieren, doch deuten die Ergebnisse (ϱ* = −1,29 bzw. ϱ1* = −1,26 und ϱ2* = −1,16) auf einen Übergangszustand, der keine Ähnlichkeit mit einem offenkettigen Carbeniumion besitzt.

On the Autoxidation of Derivatives of Norbornenen Norbornene, bicyclo[2, 2, 1]2-heptene-5-carboxylic acid methyl ester, bicyclo-[2, 2, 1]2-heptene-5-carbonitril, 5-methylbicyclo[2, 2, 1]2-heptene-5-carboxylic acid methyl ester and dicyclopentadiene are easily oxidized by molecular oxygen; the corresponding exo-epoxides are formed as main products by attack on the norbornene double bond.

AbstractDie Mischdimerisierung von 4‐Vinyl‐cyclohexen (I) und Äthylen in Gegenwart von Ni‐Katalysator‐Systemen wird untersucht.

AbstractAllylvinyläther 1, Acrylsäureallylester 2, Heptadiensäuremethylester 3, Acrylsäure‐N‐allylamide 4, Diallylalkylamine 5 und Triallylamin 6 werden auf ihre Fähigkeit hin untersucht, in Gegenwart von Basen zu isomerisieren.Während die Verbindungen 1, 3 und 5 sich mit Basen isomerisieren lassen, beobachtet man bei der Behandlung von 2 und 4 mit NaOCH3 in Benzol bzw. Dimethylformamid Additionsreaktionen. Eine intramolekulare CC‐Verknüpfung konnte nicht festgestellt werden.Triallylamin 6 läßt sich mit K/Al2O3 bzw. Na/Al2O3 isomerisieren und zu einem Δ2‐Tetrahydropyridin cyclisieren.