2 edition of Electrochemical and photochemical cyclization of nitrogen heterocyclic compounds. found in the catalog.
Electrochemical and photochemical cyclization of nitrogen heterocyclic compounds.
Stephen Armstrong Hewitt
Written in English
Thesis (Ph. D.)--The Queen"s University of Belfast, 1982.
|The Physical Object|
An electrochemical route to 1,4‐benzoxazin‐3‐ones, important structural motifs in natural products and in pharmaceutically active compounds, by anodic C−H amination of phenoxyacetate derivatives was established by the groups of Yoshida and Waldvogel (Scheme 12). 53, 54 Electrochemical oxidation of phenoxyacetate substrates afforded the Cited by: 1. Introduction. The importance of palladium catalysis in the synthesis of heterocyclic derivatives can hardly been overemphasized. 1 Palladium‐based catalysts are, in fact, able to promote a plethora of synthetic transformations leading to heterocyclic derivatives, by functionalization of a heterocyclic ring as well as by cyclization processes involving the construction of the heterocyclic Author: Bartolo Gabriele, Raffaella Mancuso, Lucia Veltri, Ida Ziccarelli, Nicola Della Ca.
The electrochemical synthesis of heterocyclic compounds can be considered as a mature discipline. The last comprehensive review dealing with electrochemical heterocycle generation has been published in by Tabaković. Earlier reviews on different aspects of the electrochemistry of heterocyclic compounds are also available [27–29].Cited by: The Front Cover shows an allegory of the formation of polydopamine (black material) from dopamine (white). This polymer is easily formed by oxidation. It contains heterocyclic rings in various states of oxidation. The cover feature reflects the fairy tale “Frau Holle” (“Mother Hulda”) from the famous book “Children's and Household Tales” collected by the brothers Grimm.
They are cyclic compounds containing one or more heteroatom (oxygen, nitrogen, sulphur etc.). These compounds are of biological and industrial importance. Many materials that are essential to life include a heterocyclic moiety; examples of these are: amino acids, nucleic acids, pigments, vitamins, antibiotics and . The second edition of Comprehensive Organic Synthesis—winner of the PROSE Award for Multivolume Reference/Science from the Association of American Publishers—builds upon the highly respected first edition in drawing together the new common themes that underlie the many disparate areas of organic themes support effective and efficient synthetic strategies, thus.
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Electrochemical and Photochemical Cyclization and Cycloreversion of Diarylethenes and Diarylethene-Capped Sexithiophene Wires. Electrochemical and photochemical cyclization of nitrogen heterocyclic compounds Author: Hewitt, S.
ISNI: Awarding Body: Queen's University of Belfast Current Institution: Queen's University Belfast Date of Award: Availability of Full Text.
Heterocyclic compounds are organic compounds containing at least one atom of carbon, and at least one element other than carbon, such as sulphur, oxygen or nitrogen within a ring structure. These structures may comprise either simple aromatic rings or non-aromatic rings. Some examples are pyridine (C5H5N), pyrimidine (C4H4N2) and dioxane (C4H8O2).
Nitrogen-heterocyclic compounds (NHCs) are toxic and bio-refractory contaminants widely spread in environment. This study investigated electrochemical degradation of NHCs at boron-doped diamond (BDD) anode with particular attention to the effect of different number and position of nitrogen atoms in molecular structure.
Electrochemical or photochemical amination reactions established on the C–H and N–H nucleophiles are unquestionable hot topics nowadays. A case in point is the considerable research work summarized herein which has been published in the past one or two years, and many analogous works are reported nearly at the same time back to by: 3.
This chapter focuses on five-membered heterocyclic compounds, and discusses their possible structures, nomenclature, properties, and tautomerism. The simplest nitrogen heterocyclic analogue of the aromatic cyclopentadiene anion is pyrrole, while the corresponding oxygen and sulfur analogues are furan and thiophene.
Photochemical transformations of small ring heterocyclic compounds. Tandem Dipolar Cycloaddition−Mannich Cyclization as an Approach to Tricyclic Nitrogen Heterocycles.
The Journal of Organic Chemistry62 (1), DOI: /joCited by: Electrochemical Synthesis of Heterocycles via Cascade Reactions Article in Current Organic Chemistry 21(15) July with Reads How we measure 'reads'.
A palladium-catalyzed cyclization reaction for the modular synthesis of highly substituted piperazines and related bis-nitrogen heterocycles couples two of the carbons of a propargyl unit with various diamine components to provide products in very good yields with high regio- and stereochemical control.
Péter Mátyus, in Comprehensive Heterocyclic Chemistry II, Electrochemical and Photochemical Reactions. A phenylsulfonyl group was introduced into position eight of the 1-oxoperhydro derivative of (2) in an electrochemical reaction which could then be stereoselectively substituted by alkyl groups 〈90SL48, 90SL, 91T〉.
Heterocyclic compounds possess a cyclic structure with two or more different kinds of atoms in the ring. This work is devoted to organic heterocyclic compounds in which the ring contains at least.
Heterocyclic Chemistry. Seven Membered Heterocyclic Compounds Five Membered Heterocyclic Compounds benzene bond carbon carbonyl Chem Chemical Chemistry chloride CoHS compounds containing converted COOC2H5 COOCH3 COOH corresponding cyclization derivatives direct electron electrophilic substitution employed epoxide equation 3/5(6).
Nitrogen heterocyclic N-oxides attract enormous interest in synthetic chemistry, medicinal chemistry, functional materials and energetic materials.
Cyclization reaction turns out to be an important and highly rewarding protocol for the construction of N-heterocyclic N-oxides and different types of organonitrogen compound could be utilized as Cited by: 5.
Advances in Heterocyclic Chemistry is the definitive series in the field - one of great importance to organic chemists, polymer chemists, and many biological scientists.
Because biology and organic chemistry increasingly intersect, the associated nomenclature also. A unique cyclization of benzamide derivatives that contain a propargyl ether by a Pd(0)/dialkyl(biaryl)phosphine catalytic system efficiently provides various six-membered N-heterocyclic compounds that contain a fully substituted carbon center.
Mechanistic studies suggest that this unprecedented cyclization starts with the cleavage of a. Title:Photochemical Reactions: Synthesis of Six-membered N-heterocycles VOLUME: 14 ISSUE: 7 Author(s):Navjeet Kaur* Affiliation:Department of Chemistry, Banasthali University, Banasthali (Rajasthan) Keywords:Heterocycles, nitrogen, photochemical, synthesis, six-membered rings, irradiation.
Abstract:Background: Chemists have been interested in light as an energy source to induce chemical Cited by: 8. Synthesis of nitrogen-containing heterocycles with isocyanides, isothiocyanates, nitriles, imines, oxime derivatives, and other related compounds has been deeply investigated in organic synthesis.
This chapter mainly focuses on summarizing radical cyclization reactions of these C-N unsaturated precursors to afford N -heterocycles in the past Cited by: 2. The present study describes the microwave-induced aqueous phase synthesis, characterization, and corrosion inhibition effect of five heterocyclics containing nitrogen, oxygen, and sulfur (designated by CINH-1 to CINH-5) for mild steel in 1 M HCl.
The effectiveness of the newly synthesized heterocyclics has been evaluated using experimental and theoretical by: 3. The ene cyclization has evolved to become an indispensable tool for the synthesis of various ring size heterocyclic compounds. In the past and recent years, many exciting reports have demonstrated the broad scope and synthetic utility of ene cyclization and the versatility of oxonium ion, iminium ion and thionium ion by: 3.
Pages in category "Nitrogen heterocycles" The following pages are in this category, out of total. This list may not reflect recent changes (). trosynthesis can provide a milder and more environmentally benign alternative. In fact, numerous examples for the electrochemical construction of heterocycles have been reported in recent years.
These cases demonstrate that ring formation can be achieved effi-ciently under ambient conditions without the use of additional reagents.New methods for the synthesis of heterocyclic compounds* Aldo Caiazzo1, we recently became interested in developing an electro-chemicalunderstanding of oxidative atom-transfer reactions.
The ultimate goal is to find general and nitrogen-containing heterocycles have 28 kcal/mol of strain  and are amenable to ring-opening reac.containing heterocyclic nitrogen containing heterocyclic compounds compounds iii Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.
Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Fee Related Application number Cited by: 5.