Results 61 to 70 of about 276 (104)

Spiro-2H-oxocines

Chemistry of Heterocyclic Compounds, 1976
The use of o-hydroxycinnamaldehyde as the aldehyde component in spiran synthesis in the case of condensation with the 2,3-trimethyleno-1-benzopyrylium salt led to the production of the first spiran with a conjugated eight-membered ring — spiro(2H-1-benzopyran-3, 3′-trimethyleno-2,2'-2'H-7',8t-benzooxocine).
O. M. Babeshko, E. A. Medyantseva, L. E. Nivorozhkin, V. I. Minkin   +3 more
openaire   +2 more sources

Regioselective Synthesis of Oxepin‐ and Oxocin‐Annulated 2‐Quinolones.

ChemInform, 2005
AbstractFor Abstract see ChemInform Abstract in Full Text.
Shital K. Chattopadhyay, Rajat Dey, Suman Biswas   +2 more
openaire   +1 more source

ChemInform Abstract: SYNTHESIS OF 6H‐DIBENZO(B,F)OXOCIN

Chemischer Informationsdienst, 1981
AbstractDurch Veretherung des Salicyla1dehydphenolats (II) und nachfolgende Wittig‐Olefinierung wird Dibenzo‐oxocin (IV) hergestellt.
B. BEGASSE, M. LE CORRE
openaire   +1 more source

Combined Claisen Rearrangement and Ring Closing Metathesis as a Route to Oxepin‐ and Oxocin‐Annulated Coumarins.

ChemInform, 2002
AbstractFor Abstract see ChemInform Abstract in Full Text.
Shital K. Chattopadhyay, Susama Maity, Srikanta Panja   +2 more
openaire   +1 more source

Synthesis of New Structural Analogues of Natural Integrastatins with a Basic Epoxybenzo[7,8]oxocine Skeleton: Combined Experimental and Computational Study

Synthesis, 2023
AbstractIn this work, the cyclization reactivity of various 3-acetyl-2-methylpyridines (including 3-acetyl-2-methylquinoline) containing both electron donor and acceptor substituents with salicylaldehyde into epoxybenzooxocino[4,3-b]pyridine derivatives was studied. The reactions were carried out in mild (under room temperature or reflux in 2-propanol)
Ivan V. Kulakov, Alena L. Stalinskaya, Semyon Y. Chikunov, Irina A. Pustolaikina, Yuri V. Gatilov   +4 more
openaire   +1 more source

Synthesis of Oxepine‐, Oxocine‐ and Azepine‐Annulated Carbazole Derivatives by Combined Claisen Rearrangement and Diene/Enyne Metathesis.

ChemInform, 2006
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.
Shital K. Chattopadhyay, Shankar P. Roy, Debalina Ghosh, Gautam Biswas   +3 more
openaire   +1 more source

ChemInform Abstract: SYNTH. UND THERMODYNAMISCHE ACIDITAET VON DIBENZ(B,G)OXOCIN

Chemischer Informationsdienst, 1972
AbstractXanthylium‐perchlorat (I) reagiert mit Diazoessigester (II) in Acetonitril zu den Addukten (III) und (IV),wobei (IV) bei der Thermolyse in (III) übergeführt werde kann.
H. S. KASMAI, H. W. WHITLOCK
openaire   +1 more source

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
openaire   +1 more source

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

Synthesis, 2008
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
openaire   +1 more source

Palladium-catalyzed [4 + 4] cycloadditions for highly diastereo- and enantioselective synthesis of functionalized benzo[ b ]oxocines

Organic Chemistry Frontiers, 2022
An efficient palladium-catalyzed asymmetric [4 + 4] cycloaddition of highly reactive  ortho -quinone methides with γ-methylidene-δ-valerolactones for the construction of functionalized eight-membered benzo[ b ]oxocine derivatives has been developed.
Xunhua Wang, Jianfeng Yang, Ruifeng Lv, Pengfei Song, Denghui Ye, Jitian Liu, Xiaoxun Li   +6 more
openaire   +1 more source