Results 271 to 280 of about 853,691 (310)

Streamlined modular synthesis of saframycin substructure via copper-catalyzed three-component assembly and gold-promoted 6-endo cyclization. [PDF]

Beilstein J Org Chem
Kanno A, Tanifuji R, Yoshida S, Sato S, Maki-Yonekura S, Takaba K, Kang J, Tono K, Yonekura K, Oguri H.   +9 more
europepmc   +1 more source

Development of urea-bridged cyclic dominant negative pneumococcus competence-stimulating peptide analogs.

Org Biomol Chem
Mehrani M, Lella M, Graham KA, Borotto NB, Tal-Gan Y.   +4 more
europepmc   +1 more source

Polynitrogen chemistry enters the ring [PDF]

Science, 2017
A cyclo -N 5 − anion has been synthesized as a stable salt and characterized
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ChemInform Abstract: 1‐AZIRINE RING CHEMISTRY

Chemischer Informationsdienst, 1977
AbstractSynthese und Reaktionen von 1‐Azirinen werden untersucht.
Vasu Nair, Ki Hyup Kim
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Ring‐Transformation Graphs in Heterocyclic Chemistry [PDF]

Bulletin des Sociétés Chimiques Belges, 1992
AbstractA novel graph‐theoretical and topological approach is suggested for the description and classification of a great number of simple ring‐transformation reactions of heterocycles. The suggested ring‐bond‐redistribution graphs (which can be easily obtained from the known mechanisms of rearrangements or recyclizations) visualize the degree of ...
Eugeny V. Babaev, Nikolai S. Zefirov
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Chemistry of the solanidane ring system

Journal of the Chemical Society C: Organic, 1971
The reaction of acetyldemissidine and acetylsolanidine with cyanogen bromide is described and the results of the lithium aluminium hydride reduction of the bromo-cyanamides so produced are discussed. The hydrolysis of acetyldemissidine bromo-cyanamide under very mild conditions caused a retro-von Braun reaction to afford the initial alkaloid.
J. A. Beisler, Y. Sato
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Unusual ring systems in organic chemistry

Naturwissenschaften, 1977
In this article several compounds with unusual ring systems are surveyed briefly. Saturated and unsaturated monocyclic compounds, polycyclic compounds, and unconventional aromatic systems are covered. The reasons for the interest of organic chemists in the unusual ring systems are discussed.
Hanack, Michael, Subramanian, L. R., Eymann, Wolfgang   +2 more
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The chemistry of (ring)Ru2+ (ring = tetramethylthiophene, p-cymene)

Organometallics, 1991
Described are the compounds ((ring)Ru(OTf){sub 2}){sub x}, where ring = 2,3,4,5-tetramethylthiophene (TMT, 1), and p-cymene (2). These electrophilic reagents serve as precursors to ((ring)RuL{sub 3}){sup 2+}, where L{sub 3} = (H{sub 2}O){sub 3}, (NH{sub 3}){sub 3}, and (PH{sub 3}){sub 3}. Solutions of 1 and 2 react with carbon monoxide to give (ring)Ru(
Edward A. Ganja, Thomas B. Rauchfuss, Charlotte L. Stern   +2 more
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ChemInform Abstract: Equilibria in Organo Antimony Ring Chemistry.

ChemInform, 1992
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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.
R. Kaller, Hans Joachim Breunig, S. Guelec   +2 more
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