Results 81 to 90 of about 319 (128)

Regioselective Synthesis of Oxepin- and Oxocin-Annulated Quinolines by Combined ‘Claisen-Rearrangement/Olefin-Metathesis’ Reactions

Synthesis, 2007
Oxepin- and oxocin-fused quinolines were prepared by a combined Claisen-rearrangement/ring-closing metathesis approach. The metathesis reactions proceeded in good yields despite the presence of the lone pair of the nitrogen atom of the quinoline moiety. The formation of a hydrochloride salt was not necessary.
Peter Langer, Sven Rotzoll, Helmar Görls   +2 more
openalex   +2 more sources

Synthesis of 6H-Dibenzo[b,f]-oxocin

Synthesis, 1981
B. Begasse, M. LE CORRE
openalex   +2 more sources

Synthesis of Oxepin‐ and Oxocin‐Annulated Pyrimidine Derivatives by Claisen Rearrangement and Ring Closing Metathesis/Ring Closing Enyne Metathesis.

ChemInform, 2007
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Krishna C. Majumdar, Pradip K. Maji, Habibur Rahaman, Brindaban Roy   +3 more
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ChemInform Abstract: Regioselective Synthesis of Oxepin and Oxocin Annulated Quinoline Heterocycles by Ring‐Closing Metathesis.

ChemInform, 2008
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Krishna C. Majumdar, Pradip Debnath, Abu Taher   +2 more
openalex   +2 more sources

Regioselective Synthesis of Oxepin and Oxocin Annulated Quinoline Heterocycles by Ring-Closing Metathesis

Letters in Organic Chemistry, 2008
Krishna Majumdar, Pradip Debnath, Abu Taher   +2 more
openalex   +2 more sources

Synthesis and thermodynamic acidity of dibenz[b,g]oxocin

The Journal of Organic Chemistry, 1972
H. S. Kasmai, H. W. Whitlock
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ChemInform Abstract: RING EXPANSION OF 3‐ACETYLCOUMARIN BY DIAZOETHANE, LACTONES DERIVED FROM OXEPIN, OXOCIN, AND OXONIN

Chemischer Informationsdienst, 1974
AbstractDie Umsetzung des Cumarins (I) mit Diazoäthan (II) verläuft teilweise unter Alkylierung zu (III) und teilweise unter Ringerweiterung zu den Derivaten (IV)‐(VII).
R. Clinging, Francis M. Dean, Leonard E. Houghton   +2 more
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Unusual Dimerization of 3-Methylphenalen-1-One, Leading to a Chiral Heptacyclic Oxocin

Letters in Organic Chemistry, 2005
Sergey Pogodin, Muniappan Thirumalaikumar, S. Cohen, Israel Agranat   +3 more
openalex   +2 more sources

ChemInform Abstract: EINFACHE SYNTH. DES NAPHTH(2,1‐B)OXEPIN‐ UND DES NAPHTH(2,1‐B)OXOCIN‐SYST.

Chemischer Informationsdienst. Organische Chemie, 1970
AbstractIn Gegenwart von sauren Katalysatoren (HCl in Eisessig) erhält man bei der Reaktion zwischen β‐Naphthol (I) und dem 2,5‐Dimethoxy‐tetrahydrofuran (II) bzw. dem 2‐Äthoxy‐2,3‐dihydro‐4H‐pyran (III) über kationische Zwischenstufen die beiden tetracyclischen Kondensate (IVa) und (IVb), die z.B.
J. Jonás̆, T. P. Forrest
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Ring expansion of 3-acetylcoumarin by diazoethane: lactones derived from oxepin, oxocin, and oxonin

Journal of the Chemical Society, Perkin Transactions 1, 1974
Diazoethane partly alkylates 3-acetylcoumarin giving 3-acetyl-4-ethylcoumarin, and partly expands the lactone ring giving, after addition of a second molecule of diazoethane, the benzoxepinopyrazoline (IX) as a racemate of assigned stereochemistry.
R. Clinging, Francis M. Dean, Leonard E. Houghton   +2 more
openalex   +2 more sources