|Statement||edited by Richard H. Wiley.|
|Series||The chemistry of heterocyclic compounds -- Vol.17|
|Contributions||Wiley, Richard H.|
Adolfo Quilico and Giovanni Speroni are the editors of Five- and Six-Membered Compounds with Nitrogen and Oxygen (Excluding Oxazoles), Vol published by : Adolfo Quilico. Additional Physical Format: Online version: Five- and six-membered compounds with nitrogen and oxygen (excluding oxazoles). New York, Interscience Publishers, Genre/Form: Electronic books: Additional Physical Format: Print version: Five- and six-membered compounds with nitrogen and oxygen (excluding oxazoles). A systematic arrangement of the chapters provides a uniform treatment throughout and allows very easy access to the primary literature. Volume 3 specifically deals with the structure, reactivity, synthesis and applications of six-membered ring compounds containing oxygen, sulfur or two or more nitrogen : C.W. Rees.
This chapter deals with the reactivity of five-membered heterocyclic compounds, including those with two or more than one heteroatom (either nitrogen, sulfur, or oxygen) in the ring, including neutral azoles, azolium salts, azole anions, azolinones, azolinethiones, azolinimines, N-Oxides, N-imides, and N-ylides of azoles. An uncharged aromatic (completely conjugated) six-membered ring containing an oxygen or sulfur atom is possible only if the ring contains a carbonyl group (i.e., a ring carbon atom linked by a double bond to an oxygen atom not in the ring), as in the pyrones. The pyrans contain extra hydrogen atoms. About this book The Chemistry of Heterocyclic Compounds, since its inception, has been recognized as a cornerstone of heterocyclic chemistry. Each volume attempts to discuss all aspects – properties, synthesis, reactions, physiological and industrial significance – of a specific ring system. Nitrogen Heterocyclic Compounds. Heterocyclic compounds are cyclic compounds with the ring containing carbon and other element, the component being oxygen, nitrogen and sulfur. The simplest of the five membered heterocyclic compounds are pyrrole, furan and thiophene, each of which contains single heteroatoms.
Table 8: Five-Member Ring Compounds with Four Heteroatoms Heteroatom Unsaturated 4 × Nitrogen Tetrazole With 5-heteroatoms, the compound may be considered inorganic rather than heterocyclic. Pentazole is the all nitrogen heteroatom unsaturated compound. MEMBERED RINGS Table 9: Six-Membered Rings with a Single HeteroatomFile Size: KB. Transition metal-catalyzed carbocyclization of nitrogen and oxygen-tethered 1,n-enynes and diynes: synthesis of five or six-membered heterocyclic compounds. Abstract. Cycloisomerization of 1,n-enynes and diynes is a powerful method in organic synthesis to access heterocyclic compounds and has drawn increasing attention from organic chemists. Lastly, we synthesized and purified diketopiperazine derivatives (7–9) characterized by an imidazole ring linked to a nitrogen-containing six-membered nucleus. All the compounds (1 – 9) were subjected to in vitro and in silico exhaustive evaluations as CA by: 4. Using wave functions and the full operators, dipole and second moments are reported for a number of five- and six-membered ring heterocycles containing the elements nitrogen, oxygen, sulphur, and phosphorus. The agreement with experiment is satisfactory and a linear relationship µ= 0µ is obtained with an avera.