Sulfur heterocycles, Heterocyclic compounds with 2 rings). ... of several compounds consisting of two fused thiophene rings. ... Advances in Heterocyclic Chemistry. Advances in Heterocyclic Chemistry. Vol. 19. pp. 123-214. doi:10.1016/S0065-2725(08)60231-7 ... Thieno[3,4-b]thiophene CAS RN 250-65-7 m.p. 7.0-7.5 °C colorless oil. 2λ4δ2-Thieno[3,4-c]thiophene CAS RN 24976-21-4 not ... 8 (4): 139-44. doi:10.1021/ar50088a005. Litvinov, V. P.; Gol'dfarb, Y. A. L. (1976). "The Chemistry of Thienothiophenes and ...

... is a heterocyclic compound with the formula C5H8O. The six-membered C5O ring has the unsaturation adjacent to oxygen. The ... Kierkus (2001). "3,4‐Dihydro‐2H‐pyran". eEROS. doi:10.1002/047084289X.rd230. R. L. Sawyer and D. W. Andrus (1955). "2,3- ... 3, p. 276 R. A. Earl L. B. Townsend (1990). "Methyl 4-Hydroxy-2-butynoate". Organic Syntheses.; Collective Volume, vol. 7, p. ...

In organic chemistry, a dioxazolone is a cyclic carbonate incorporated into C2NO2 ring. It is an uncommon heterocyclic compound ... a potentially hazardous class of compounds". Journal of Organic Chemistry. 48 (21): 3845-7. doi:10.1021/jo00169a059. Park, ...

It is a heterocyclic compound with a four-membered ring. Two sulfur atoms are adjacent, and the molecule is saturated. 1,2- ... The combination of ring strain, and lone pairs of electrons, which repel each other, on the sulfur atoms makes the sulfur- ... Dithiatopazine is a tricyclic compound with the -S-S- as a bridge. 1,2-Dithietan-3-one, the ketone of 1,2-dithietane, was ... Advances in Heterocyclic Chemistry. Vol. 77. pp. 221-284. doi:10.1016/S0065-2725(00)77007-3. ISBN 9780120207770. Nicolaou, K. C ...

... s are a class of heterocyclic compounds in organic chemistry. They are analogs of the more common lactones in which ... Thiolactone rings can also be found in peptides synthesized by bacteria such as Staphylococcus aureus in order to regulate ... The sulfur atom is within the ring system and adjacent to a carbonyl group. Thiolactones can be prepared by dehydration of ... β-Thiolactones can be opened by reaction at the 4-position via SN2 nucleophilic reactions. The most common thiolactone, ...

... s or pyranones are a class of heterocyclic chemical compounds. They contain an unsaturated six-membered ring containing ... The 2-pyrone (or α-pyrone) structure is found in nature as part of the coumarin ring system. 4-Pyrone (or γ-pyrone) is found in ... some natural chemical compounds such as chromone, maltol and kojic acid. Furanone, which has one fewer carbon atom in the ring ... ISBN 978-0-02-418140-4. v t e (Pyrones, All stub articles, Heterocyclic compound stubs). ...

... is an heterocyclic compound with the formula C8H7N). It is an uncommon isomer of indole with the nitrogen located at ... a ring fusion position. The saturated analogs are indolizidine, which are found in a variety of alkaloids such as swainsonine. ... 2011). Modern Heterocyclic Chemistry. Wiley-VCH. Chemical synthesis of indolizines v t e (Articles without KEGG source, ECHA ... ISBN 978-0-85404-182-4. Elattar, K.M.; Youssef, I.; Fadda, A.A. (4 May 2016). "Reactivity of indolizines in organic synthesis ...

A thienotriazolodiazepine is a heterocyclic compound containing a diazepine ring fused to thiophene and triazole rings. ... 4-Benzodiazepines and Analogues Using Cholesteryl-10-Undecenoate Bonded Phase in Microcolumn Liquid Chromatography". Journal of ... 4-benzodiazepines (such as diazepam) and triazolobenzodiazepines (such as alprazolam). Thienotriazolodiazepines that are not ...

... s are substituted thiepins, with a nitrogen replacing a carbon in the seven-membered heterocyclic compound. Depending ... Benzothiazepines have a single benzene attached to the ring, while dibenzothiazepines have two. Diltiazem, a benzothiazepine, ... Thiazepines at the U.S. National Library of Medicine Medical Subject Headings (MeSH) v t e (All stub articles, Heterocyclic ... on the location of the nitrogen, one distinguishes 1,3-thiazepine and 1,4-thiazepine. ...

... is a heterocyclic chemical compound, a quinazoline with a carbonyl group in the C4N2 ring. Two isomers are ... These compounds are of interest in medicinal chemistry. 2-Quinazolinone 4-Quinazolinone Common routes to quinazolines involve ... Quinazolinone drugs that function as hypnotic/sedatives, methaqualone (Quaalude) for example, usually contain a 4-quinazolinone ... possible: 2-quinazolinone and 4-quinazolinone, with the 4-isomer being the more common. ...

Heterocyclic compounds with 1 ring, All stub articles, Heterocyclic compound stubs). ... carbonyl compounds, or derivatives thereof. IUPAC, Compendium of Chemical Terminology, 2nd ed. (the "Gold Book") (1997). Online ... 4-trioxolane), the relatively stable product generated immediately prior to reductive or oxidative cleavage to form alcohols, ... ISBN 978-0-534-38999-4. v t e (Oxygen heterocycles, Polyoxides, ...

... "polycyclic ring system". Cyclic compound Polycyclic compound Heterocyclic compound Bicyclic molecule Spiro compound IUPAC, ... "polycyclic ring", "fused ring", "spiro ring" and "indole ring", where clearly a polycyclic ring system is intended. Likewise, a ... A heterocycle or heterocyclic ring is a ring containing atoms of at least two different elements, i.e. a non-homocyclic ring. A ... A molecule containing no rings is called an acyclic or open-chain compound. A homocycle or homocyclic ring is a ring in which ...

A furanolactone is a heterocyclic chemical compound that contains both lactone and furan rings in its chemical structure. ... Examples include: The salvinorins, including the hallucinogenic compound salvinorin A Columbin, a bitter diterpenoid from ... selective modification of the furan ring". Bioorg Med Chem Lett. 16 (12): 3170-4. doi:10.1016/j.bmcl.2006.03.062. Kohno H, ...

... is a saturated heterocyclic compound containing one oxygen, one sulfur and four carbon atoms in a ring. The formula ... There are three isomers: 1,2-Oxathiane or o-Oxathiane 1,3-Oxathiane or m-Oxathiane 1,4-Oxathiane or p-Oxathiane the most ... important This set index article lists chemical compounds articles associated with the same name. If an internal link led you ...

... is an aromatic organic compound composed of fused pyrimidine and pyrazine rings. Pteridines also constitute a group ... of heterocyclic compounds containing a wide variety of substituents on this parent structure. Pterins and flavins are classes ... ISBN 978-0-85404-182-4. Kritsky, M. S; Telegina, T. A; Vechtomova, Y. L; Kolesnikov, M. P; Lyudnikova, T. A; Golub, O. A (2010 ...

... is a seven-membered heterocyclic compound with two nitrogen atoms (e.g., in ring positions 1 and 2). Types include: 1 ... 4-diazepine ring v t e (Articles with short description, Short description is different from Wikidata, All stub articles, ... 2-diazepine 1,3-diazepine 1,4-diazepine Benzodiazepines, a class of commonly used medications whose structure contains a 1, ...

The oxathiazolones are a family of heterocyclic compounds in which the parent derivative has the molecular formula C2HNO2S and ... It has been proposed that the π system of the ring consists of CNS and CO2 "π islands" that prefer coplanarity to enhance inter ... Chemistry of Heterocyclic Compounds. 46 (4): 484-489. doi:10.1007/s10593-010-0535-9. S2CID 55033194. Marion C. McKie and R. ... ring π conjugation. The traditional route for 1,3,4-oxathiazol-2-one synthesis is via 1,3 dipolar cycloaddition, where ...

Dioxindole is a non-aromatic heterocyclic organic compound. It has a bicyclic structure consisting of a six-membered aromatic ... a ring closing reaction occurs by the bond from the aromatic benzene ring attacking the partially positive carbonyl to form a ... 3-substituted-3-hydroxy-2-oxindole is the central structure of a wide variety of biologically important compounds found in ... ring fused to a five-membered nitrogen containing ring. It is a hydroxy derivative of oxindole first prepared by reducing ...

... they are five-membered heterocyclic compounds containing one sulfur and two nitrogen atoms. They are aromatic ring by virtue of ... Wim Dehaen; Vasiliy A. Bakulev; Edward C. Taylor; Jonathan A. Ellman (27 April 2004). The Chemistry of Heterocyclic Compounds, ... The compounds themselves are rarely synthesized and possess no particular application, however compounds bearing them as a ... In chemistry thiadiazoles are a sub-family of azole compounds, with the name thiadiazole originating from the Hantzsch-Widman ...

... is the name given to either of two heterocyclic compounds with the formula C4H4N2O: 2-pyrimidone and 4-pyrimidone. ... ring. Derivatives of pyrimidone are the basis of many other biological molecules, including: Nucleobases, such as cytosine ... The compounds can also be called 2-hydroxypyrimidine or 4-hydroxypyrimidine respectively, based on a substituted pyrimidine, or ... v t e (Chemical articles with multiple compound IDs, Multiple chemicals in an infobox that need indexing, Chemical articles ...

... s are saturated heterocyclic compounds that contain two divalent sulfur atoms and two sp3-hybridized carbon centers. ... doi:10.1016/B978-008044992-0.00218-2. Zoller, U (1996). "Four-membered Rings with Two Sulfur Atoms". Comprehensive Heterocyclic ... Two isomers are possible for this class of organosulfur compounds: 1,2-dithietanes, 4-membered rings where the two sulfur atoms ... Drabowicz, J; Lewkowski, J; Kudelska, W; Zając, A (2008). "Four-membered Rings with Two Sulfur Atoms". Comprehensive ...

... is a heterocyclic compound. The structure of phenoxazine consists of an oxazine fused to two benzene rings. It ... and six-membered rings with two or more heteroatoms". britannica.com. v t e (Articles without KEGG source, ECHA InfoCard ID ... occurs as the central core of a number of naturally occurring chemical compounds such as dactinomycin and litmus. The dyes Nile ...

7-Dichloroquinoline is a two-ring heterocyclic compound used as a chemical intermediate to aminoquinoline antimalarial drugs ... the pyridine ring is much more reactive in nucleophilic aromatic substitution reactions than the chlorine in the benzene ring. ... quinoline and Related Compounds". Journal of the American Chemical Society. 72 (4): 1814-1815. doi:10.1021/ja01160a116. Kenyon ... which is cyclised to form the pyridine ring by heating in mineral oil. Hydrolysis and decarboxylation follows, before the ...

Pyrilium is a mono-cyclic and heterocyclic compound, one of the oxonium ions. Pyrylium and its derivatives form stable salts ... Pyrylium is a cation (positive ion) with formula C5H5O+, consisting of a six-membered ring of five carbon atoms, each with one ... Advances in Heterocyclic Chemistry. Vol. 10. New York: Academic Press. pp. 241-326. doi:10.1016/S0065-2725(08)60499-7. Balaban ... Advances in Heterocyclic Chemistry: Supplement. Vol. 2. New York: Academic Press. ISBN 978-0-12-020652-0. Balaban, A. T. (1979 ...

... is a heterocyclic chemical compound which contains an unsaturated three-membered ring containing two carbon atoms and ... Hypothetical chemical compounds, Three-membered rings, Antiaromatic compounds). ... ISBN 978-0-85404-182-4. Wang, Jia; Marks, Joshua; Turner, Andrew; Mebel, Alexander; Eckhardt, Andre; Kaiser, Ralf (March 2023 ... Quantum chemical computational techniques found the configuration to be extremely strained and proposed an antiaromatic 4π ...

... is a heterocyclic compound with the formula C4H4S. Consisting of a planar five-membered ring, it is aromatic as ... Fusion of a pair of thiophene rings gives isomers of thienothiophene. Thiophenes are important heterocyclic compounds that are ... The benzene ring of a biologically active compound may often be replaced by a thiophene without loss of activity. This is seen ... Fusion of thiophene with a benzene ring gives benzothiophene. Fusion with two benzene rings gives either dibenzothiophene (DBT ...

... is a heterocyclic organic compound containing both nitrogen and oxygen in a 5-membered ring. Oxazolidinones are a ... Oxazolidine - the ring without the carbonyl group Oxazolone - the unsaturated analogues Shinabarger, D. (1999). "Mechanism of ... has a different mechanism of action and substantially different properties from the aforementioned compounds. Contezolid (MRX-I ... Substituents at the 4 and 5 position of the oxazolidinone direct any aldol reaction to the alpha position of the carbonyl of ...

... is a heterocyclic compound containing one oxygen atom and one sulfur atom at opposite corners of a saturated six-membered ring ... 2008). "Product Subclass 2: Cyclic Dialkyl Sulfones and Derivatives". Category 5, Compounds with One Saturated Carbon ... 1,4-Oxathiane can be produced from low cost ingredients by heating ethylene glycol or ethylene oxide with hydrogen sulfide. ... Heating 1,4-oxathiane with ethyl iodide yields 4-ethyl-1,4-oxathianium iodide. Breslow, David S.; Skolnik, Herman (2009). Multi ...

... both of which are unsaturated heterocyclic ring compounds containing three nitrogen atoms. The basic formula is C2N3H2−. It can ... Advances in Heterocyclic Chemistry. Vol. 81. Academic Press. p. 167. doi:10.1016/S0065-2725(01)81012-6. ISBN 9780080493572. Zhu ... This enables polymers or metal organic framework compounds to be formed. Triazolate can also be substituted on its carbon atoms ... Heterocyclic compounds with 1 ring, Nitrogen compounds). ... be abbreviated by "tz". Known compounds include zinc, and ...

Pesin, V. G.; Sergeev, V. A. (1969). "Research on 2,1,3-thia- and selenadiazole". Chemistry of Heterocyclic Compounds. 3 (5): ... 2004). "Product Class 11: 1,2,5-Thiadiazoles and Related Compounds". Category 2, Hetarenes and Related Ring Systems. doi: ... Fedin, E. I.; Todres, Z. V. (1970). "Studies in the field of aromatic heterocycles" (PDF). Chemistry of Heterocyclic Compounds ... Pesin, V. G.; d'Yachenko, E. K. (1969). "Researches on 2,1,3-thia-and selenadiazole". Chemistry of Heterocyclic Compounds. 3: ...