Autoxidation von β‐Amyron (I) liefert das Diketon (II) im Gemisch mit seinem Enol‐Tautome‐ ‐ ren (III).

AbstractBeschrieben wird die Darstellung der vier isomeren 2,3‐Diole (II)‐(V) aus β‐Amyron (I) durch verschiedene Reduktions‐/Oxidationsreaktionen.

A reinvestigation of the proton resonance spectrum of vindolinine based on new data at 300 MHz is now completely consistent with the recently modified structure. These data are presented as an example of possible pitfalls in the interpretation of complex spectral data for structural analysis. Spectra and assignments are included.

Chemischer InformationsdienstVolume 3, Issue 28 Isocyclic Compounds ChemInform Abstract: UNTERSUCHUNG INDISCHER ARZNEIMITTELPFLANZEN 28. MITT. SESQUITERPENLACTONE AUS ENHYDRA FLUCTUANS LOUR, STRUKTUREN VON ENHYDRIN, FLUCTUANIN UND FLUCTUADIN E. ALI, E. ALISearch for more papers by this authorP. P. GHOSH DASTIDAR, P. P. GHOSH DASTIDARSearch for more papers by this authorS. C. PAKRASHI, S. C. PAKRASHISearch for more papers by this authorL. J. DURHAM, L. J. DURHAMSearch for more papers by this authorA. M. DUFFIELD, A. M. DUFFIELDSearch for more papers by this author E. ALI, E. ALISearch for more papers by this authorP. P. GHOSH DASTIDAR, P. P. GHOSH DASTIDARSearch for more papers by this authorS. C. PAKRASHI, S. C. PAKRASHISearch for more papers by this authorL. J. DURHAM, L. J. DURHAMSearch for more papers by this authorA. M. DUFFIELD, A. M. DUFFIELDSearch for more papers by this author First published: July 11, 1972 https://doi.org/10.1002/chin.197228460AboutPDF 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 onEmailFacebookTwitterLinkedInRedditWechat No abstract is available for this article. References E. ALI, P. P. GHOSH DASTIDAR, S. C. PAKRASHI, L. J. DURHAM, A. M. DUFFIELD, UNTERSUCHUNG INDISCHER ARZNEIMITTELPFLANZEN 28. MITT. SESQUITERPENLACTONE AUS ENHYDRA FLUCTUANS LOUR, STRUKTUREN VON ENHYDRIN, FLUCTUANIN UND FLUCTUADIN, Tetrahedron, 1972, 28, 2285. DOI: 10.1016/S0040-4020(01)93572-0; 10.1016/S0040-4020(01)93572-0 CASWeb of Science®Google Scholar Volume3, Issue28July 11, 1972 ReferencesRelatedInformation

Abstract The structures of enhydrin (2) and the co-occurring sesquiterpene lactones, viz. fluctuanin (3) and fluctuadin (4) isolated from Enhydra fluctuans Lour have been established. The stereochemistry of enhydrin has been suggested from NMR data. Selective hydrolysis of the acetate and the glycidate group in 2 yielded the alcohols 11 and 16 indicating acyl migration during their formation. Acetylation of 11 led further to acetolysis of the glycidate ester function to afford the diacetate 17. The location of the two acyl groups in 2 (and also in 3 and 4) still remain to be settled.

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAlicyclic carbohydrates. XXXVI. Participation by neighboring methoxyl in a displacement of hydroxyl by halogen. Conversion of (-)-inositol into meso (1,3,5/2,4)-cycloxhexanepentolGifford E. McCasland, M. O. Naumann, and Lois J. DurhamCite this: J. Org. Chem. 1969, 34, 5, 1382–1386Publication Date (Print):May 1, 1969Publication History Published online1 May 2002Published inissue 1 May 1969https://doi.org/10.1021/jo01257a041RIGHTS & PERMISSIONSArticle Views54Altmetric-Citations7LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (786 KB) Get e-Alerts Get e-Alerts

The isolation of a new triterpene, putranjivadione, is described. By a combination of chemical and physical methods it was shown that putranjivadione is friedelane-3,7-dione (I).

The isolation, mass spectral fragmentation, and 100 Mc./sec. nuclear magnetic resonance spectrum of the hexaacetate of 2-O-α-D-galactopyranosylglycerol, the major methanol soluble constituent of the red seaweed Laurencia pinnatifida, is described.

H. N. Khastgir, B. P. Pradhan, A. M. Duffield and L. J. Durham, Chem. Commun. (London), 1967, 1217 DOI: 10.1039/C19670001217

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAlkaloid Studies. LVI.1 The Constitution of Vallesiachotamine2Carl Djerassi, H. J. Monteiro, A. Walser, and L. J. DurhamCite this: J. Am. Chem. Soc. 1966, 88, 8, 1792–1798Publication Date (Print):April 1, 1966Publication History Published online1 May 2002Published inissue 1 April 1966https://pubs.acs.org/doi/10.1021/ja00960a037https://doi.org/10.1021/ja00960a037research-articleACS PublicationsRequest reuse permissionsArticle Views184Altmetric-Citations54LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSome Observations on the Oxidation of Virosecurinine with Monoperphthalic Acid1,2T. Nakano, S. Terao, K. H. Lee, Y. Saeki, and L. J. DurhamCite this: J. Org. Chem. 1966, 31, 7, 2274–2279Publication Date (Print):July 1, 1966Publication History Published online1 May 2002Published inissue 1 July 1966https://pubs.acs.org/doi/10.1021/jo01345a044https://doi.org/10.1021/jo01345a044research-articleACS PublicationsRequest reuse permissionsArticle Views301Altmetric-Citations21LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts

The discussion of some chemical transformations and spectral data—mainly N.M.R. and high resolution mass spectrometry—conduct to partial structure XXIV for vobtusine, a dimer indole alkaloid.

La discussion de diverses transformatons chimiques et de données spectrales—notamment R.M.N. et spectrométrie de masse à haute résolution—conduit à la structure partielle XXIV pour un alcaloïde indolique dimère, la vobtusine.

Im Kernresonanzspektrum einiger substituiertercis-2-Decalone wurden die chemischen Verschiebungen angulärer Methylgruppen untersucht. Dabei wurde festgestellt, dass die Verbindungen vorwiegend in der nicht-steroidalen Sessel-Sessel-Konformation vorliegen. Das Vorzeichen der ORD Cotton-Kurven dieser Ketone muss durch das untergeordnete Vorhandensein einer Konformation sehr starker Amplitude, wie z. B. der Twist-Form, bedingt sein.