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*  Intramolecular Heck reaction
The reaction may be used to produce carbocyclic or heterocyclic organic compounds with a variety of ring sizes. Chiral ... Ring sizes produced by the intramolecular Heck reaction range from four to twenty-seven atoms. Additionally, in the presence of ... 5) The intramolecular Heck reaction may be used to form rings of a variety of sizes and topologies. β-Hydride elimination need ... This section discusses the most common ring sizes formed by the intramolecular Heck reaction and some of its tandem and ...
*  Sonogashira coupling
... compound F. Compound F continues to react with the palladium intermediate B, with regeneration of the copper halide, G. ... Nucleophilic N-heterocyclic carbenes (NHCs) behave like typical σ-donor ligands that can substitute 2-electron ligands (i.e., ... The recyclable polymeric phosphane ligand shown below is obtained from ring-opening metathesis polymerization of a norbornene ... The active palladium catalyst is the 14 electron compound Pd0L2, complex A, which reacts with the aryl or vinyl halide in an ...
*  1,2-Dioxetanedione
Chemistry of Heterocyclic Compounds: Small Ring Heterocycles, Part 3: Oxiranes, Arene Oxides, Oxaziridines, Dioxetanes, ... The chemical compound 1,2-dioxetanedione, or 1,2-dioxacyclobutane-3,4-dione, often called peroxyacid ester, is an unstable ... ISBN 978-0-471-05624-9 ISBN 978-0-470-18720-3 John Wiley & Sons. Herman F. Cordes; Herbert P. Richter; Carl A. Heller (1969). " ...
*  Triazolate
... both of which are unsaturated heterocyclic ring compounds containing three nitrogen atoms. The basic formula is C2N3H4−. It can ... This enables polymers or metal organic framework compounds to be formed. Triazolate can also be substituted on its carbon atoms ... Katritzky, Alan R. (2002). Advances in Heterocyclic Chemistry. Academic Press. p. 167. ISBN 9780080493572. Zhu, AX; Lin, JB; ... be abbreviated by "tz". Known compounds include zinc, and natural copper minerals, chanabayaite and triazolite. Trizolate is a ...
*  Trans-2,3-Butylene carbonate
It is also an heterocyclic compound with a five-membered ring containing two oxygen atoms, and can be viewed as a derivative of ... The compound is an aprotic polar solvent and has been proposed as an ingredient of the electrolyte of lithium batteries. cis-2, ... trans-2,3-Butylene carbonate is an organic compound with formula C 5H 8O 3, or (H3C)2(C2H2)(CO3). It is an ester with a ... 3-Butylene carbonate, a stereoisomer 1,2-Butylene carbonate Propylene carbonate Geun-Chang Chung, Hyeong-Jin Kim, Song-Hui Jun ...
*  Cis-2,3-Butylene carbonate
It is also an heterocyclic compound with a five-membered ring containing two oxygen atoms, and can be viewed as a derivative of ... The compound is an aprotic polar solvent. The bacterium Pseudomonas diminuta will hydrolyze this compound but not its ... cis-2,3-Butylene carbonate is an organic compound with formula C 5H 8O 3, or (H3C)2(C2H2)(CO3). It is an ester with a carbonate ... This has been proposed as an efficient route to produce the latter from a racemic mixture of 2,3-butylene carbonates. trans-2,3 ...
*  1,3-Dioxetane
... is a heterocyclic organic compound with formula C2O2H4, whose backbone is a four-member ring of alternating oxygen and carbon ...
*  Thiazolidine
... is a heterocyclic organic compound with the formula (CH2)3(NH)S. It is a 5-membered saturated ring with a ... For example, the drug pioglitazone contains a thiazolidine ring. Another drug that contains a thiazolidine ring is the ... thioether group and an amine group in the 1 and 3 positions. It is a sulfur analog of oxazolidine. Thiazolidine is a colorless ...
*  1,2-Butylene carbonate
It is also an heterocyclic compound with a five-membered ring, and can be seen as a derivative of dioxolane, specifically 4- ... 1,2-Butylene carbonate is an organic compound with formula C 5H 8O 3, or (H5C2)(C2H3)(CO3). It is a double ester with the ... Propylene carbonate trans-1,3-Butylene carbonate Jacek Kumełan, Dirk Tuma, Sergey P. Verevkin and Gerd Maurer (2008), ... ethyl-1,3-dioxolan-2-one. 1,2-Butylene carbonate is a polar aprotic solvent, which has been considered for electric battery ...
*  Oxetane
... is an heterocyclic organic compound with the molecular formula C 3H 6O, having a four-membered ring with three carbon atoms and ... The term oxetane may also refer more generally to any organic compound containing an oxetane ring. A typical well-known method ... Other possible reactions to form oxetane ring is the Paternò-Büchi reaction. The oxetane ring can also be formed through diol ... The attached oxetane ring is an important feature that is used for the binding of microtubules in structure activity; however ...
*  Thiazepine
... 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, ... on the location of the nitrogen, one distinguishes 1,3-thiazepine and 1,4-thiazepine. ...
*  Alfred Hassner
January 2008). Small Ring Heterocycles. Wiley, Chemistry of Heterocyclic Compounds: A Series Of Monographs. ISBN 9780471056249 ... Small Ring Heterocycles (Wiley); Topics in Heterocyclic Chemistry (Springer). Hassner, Namboothiri (2012). Organic Syntheses ... International; Heterocyclic Commun.; Trends in Org. Chem. and was elected president of the Israel Chemical Society. Hassner is ... Hassner's group pioneered in methodology for synthesis of small ring heterocycles such as aziridines, azirines, azetines, as ...
*  Indoline
... consisting of a six-membered benzene ring fused to a five-membered nitrogen-containing ring. The compound is based on the ... Indoline is an aromatic heterocyclic organic compound with the chemical formula C8H9N. It has a bicyclic structure, ... Katritzky, A. R.; Pozharskii, A. F. (2000). Handbook of Heterocyclic Chemistry (2nd ed.). Academic Press. ISBN 0080429882. ... indole structure, but the 2-3 bond is saturated. By oxidation/dehydrogenation it can be converted to indoles. Indoline was used ...
*  Pyrimidine
The pyrimidine ring system has wide occurrence in nature as substituted and ring fused compounds and derivatives, including the ... Heterocyclic Compounds. 6. New York: Wiley. p. 235. Pinner, A. (1884). "Ueber die Einwirkung von Acetessigäther auf die Amidine ... One of the three diazines (six-membered heterocyclics with two nitrogen atoms in the ring), it has the nitrogen atoms at ... As is often the case with parent heterocyclic ring systems, the synthesis of pyrimidine is not that common and is usually ...
*  Diazepine
... is a seven-membered heterocyclic compound with two nitrogen atoms (e.g., in ring positions 1 and 2). Types include: 1 ... 4-diazepine When combined with a benzene ring, it is the basis of the benzodiazepine family of compounds. In these compounds ... depending on the position of the fused benzene ring, the nitrogen atoms are also given numbers 1 and 4).[citation needed]. ...
*  Pyrimidone
... 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 ...
*  Trimethylenemethane cycloaddition
The problem is generally less severe for five-membered, cyclic TMMs due to ring strain in the corresponding MCPs. When ring ... Carbonyl compounds may be used as the 2π component under the appropriate conditions. For instance, in the presence of an indium ... Three classes of compounds have been used to generate synthetically useful TMM intermediates: diazenes, silyl-substituted ... Acetal 1 has been used in this context, and provides cyclopentanes with the acetal functionality exo to the newly formed ring ...
*  Sydnone
... s are mesoionic heterocyclic chemical compounds possessing a 1,2,3-oxadiazole core with a keto group in the 5 position. ... possessing both positive and negative charges which are delocalized across the ring. Recent computational studies have ... Chemical compounds with unusual names Montréalone Münchnone Sydnone imine IUPAC, Compendium of Chemical Terminology, 2nd ed. ( ... J. Ogilvie; V. K. Miyamoto; Thomas C. Bruice (1961). "A Kinetic Study of the Reaction of a "Meso-ionic" Compound ( ...
*  Spiropyran
... the pyran ring and the replaced ring. The second ring, the replaced one, is usually heterocyclic but there are exceptions. When ... A review". Chemistry of Heterocyclic Compounds. 41 (3): 281-311. doi:10.1007/s10593-005-0148-x. Prypsztejn, H.; Negri, R.M. ( ... The structural differences between spiropyran and merocyanine form is that, while in the first one the ring is in the closed ... Photochromic compounds based on spiropyrans, spirooxazines, and [2H]chromenes are being investigated because of their silver- ...
*  Dihydropyran
... is a heterocyclic compound with the formula C5H8O. The six-membered, non-aromatic ring has five carbon atoms and ... The indicated hydrogen is placed just in front of the parent hydride (pyran). Note that the position numbers of the ring- ... pyran tetrahydropyran A Guide to IUPAC Nomenclature of Organic Compounds (Recommendations 1993): R-3.1.2 Hydro prefixes A Guide ... refers to the two added hydrogen atoms needed to remove one double bond from the parent compound pyran. The numbers in front of ...
*  Heptachlorodibenzo-p-dioxin
It is a polycyclic heterocyclic organic compound, since HpCDD contains multiple cyclic structures (two benzene rings connected ... by a 1,4-dioxin ring) in which two different elements (carbon and oxygen) are members of its rings. HpCDD has molecular formula ... The known adverse effects for dioxin compounds are (as previously mentioned) carcinogenicity. Furthermore, chloroacne, ... for dioxin-like compounds to derive systemic or human-specific TEFs to improve human risk assessment. Claes Bernes: Persistent ...
*  Thiazole
... is a heterocyclic compound that contains both sulfur and nitrogen; the term 'thiazole' also refers to a large family of ... The thiazole ring is notable as a component of the vitamin thiamine (B1). Thiazoles are members of the azoles, heterocycles ... Quantitative Aspects". Advances in Heterocyclic Chemistry. Advances in Heterocyclic Chemistry. 22: 71-121. doi:10.1016/S0065- ... Oxazoles are related compounds, with sulfur replaced by oxygen. Thiazoles are structurally similar to imidazoles, with the ...
*  Aromaticity
... also occurs in compounds that are not carbocyclic or heterocyclic; inorganic six-membered-ring compounds analogous ... Organic compounds that are not aromatic are classified as aliphatic compounds-they might be cyclic, but only aromatic rings ... In heterocyclic aromatics (heteroaromatics), one or more of the atoms in the aromatic ring is of an element other than carbon. ... Many chemical compounds are aromatic rings with other functional groups attached. Examples include trinitrotoluene (TNT), ...
*  3-Benzoxepin
Oxepin Ring Systems Containing Two Rings". Seven-Membered Heterocyclic Compounds Containing Oxygen and Sulfur. The Chemistry of ... but the bicyclic ring system is part of the naturally occurring compounds perilloxin (I) from Perilla frutescens (variant acuta ... The latter compound can be synthesized from α,α′-dibromodimethyl ether (bis(bromomethyl)ether or BBME) which is accessible from ... Heterocyclic Compounds (in German). 26th. New York: Wiley-Interscience. p. 96. ISBN 0-471-38210-8. Dimroth, K.; Pohl, G.; ...
*  Oxepane
... is a heterocyclic chemical compound with the formula C 6H 12O. Oxepane can be polymerized by cationic initiators such ... "Ring-opening Polymerization of Oxepane". Polymer Journal. 3 (1): 40-43. doi:10.1295/polymj.3.40. ISSN 1349-0540. ...
*  Metabolism
These bases are heterocyclic rings containing nitrogen, classified as purines or pyrimidines. Nucleotides also act as coenzymes ... Organic compounds (proteins, lipids and carbohydrates) contain the majority of the carbon and nitrogen; most of the oxygen and ... These compounds are made by the assembly and modification of isoprene units donated from the reactive precursors isopentenyl ... Here, the isoprene units are joined together to make squalene and then folded up and formed into a set of rings to make ...
*  1,4,2-Dithiazole
... is a heterocyclic compound consisting of an unsaturated five-membered ring containing two carbon atoms, one ... These compounds may be protonated by strong acids to give synthetically useful aromatic cations. Argyropoulos, Nikolaos G. ( ... 1,4,2-Dithiazole compounds may be formed by the reaction of nitrile sulfide (formed by the thermolysis of oxathiazolone) with ... Wai, Kwok-Fai; Sammes, Michael P. (1992). "Dithiazoles and related compounds. Part. 4. Preparation of 1,4,2-dithiazolium salts ...