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Author :
Publisher :
ISBN 13 : 9788177362787
Total Pages : 295 pages
Book Rating : 4.3/5 (627 download)
Download or read book New Methods for the Asymmetric Synthesis of Nitrogen Heterocycles written by and published by . This book was released on 2005 with total page 295 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ana Maria Faisca Phillips
Publisher : John Wiley & Sons
ISBN 13 : 1119757142
Total Pages : 759 pages
Book Rating : 4.1/5 (197 download)
Download or read book More Synthetic Approaches to Nonaromatic Nitrogen Heterocycles, 2 Volume Set written by Ana Maria Faisca Phillips and published by John Wiley & Sons. This book was released on 2022-04-11 with total page 759 pages. Available in PDF, EPUB and Kindle. Book excerpt: More Synthetic Approaches to Nonaromatic Nitrogen Heterocycles An authoritative collection of resources discussing the latest trends in the synthesis of nonaromatic nitrogen heterocycles Widely distributed in nature, nitrogen heterocycles are extremely common in synthetic substances found in pharmaceuticals, agrochemicals, and materials. The literature is evolving rapidly and explores newly emerging structures and medicines. More Synthetic Approaches to Nonaromatic Nitrogen Heterocycles offers R&D professionals the opportunity to easily access a collection of the latest relevant research in the area. In the second two-volume set of this practical reference distinguished researcher Dr. Ana Maria M. M. Faisca Phillips delivers a collection of resources focusing on the newest and most widely applicable trends emerging in synthetic strategies for nonaromatic nitrogen heterocycles. With coverage of topics including organocatalysis, cascade reactions, flow chemistry in synthesis, cycloaddition reactions, metathesis, cross-coupling reactions, and electrochemistry, the book provides quick access to critical new avenues of synthesis. More Synthetic Approaches to Nonaromatic Nitrogen Heterocycles: Volume 1 and 2 also offers readers: A thorough introduction to recent advances in the design and synthesis of cyclic peptidomimetics Comprehensive explorations of fused heterocycles and transition metal promoted synthesis of isoindoline derivatives Practical discussions of 1,4-diazepane ring-based systems and recent advances in the synthesis of azepane-based compounds In-depth examinations of strained aziridinium ions, asymmetric organocatalysis in alternative media, and the electrochemical synthesis of non-aromatic N-heterocycles Perfect for academic and industrial researchers in organic chemistry and synthesis, organometallic chemistry, pharmaceutical chemistry catalysis, and sustainable chemistry, More Synthetic Approaches to Nonaromatic Nitrogen Heterocycles: Volume 1 and 2 is an indispensable reference for anyone seeking an authoritative source of information on new and emerging trends in synthesis.
Author : Giada Arena
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (955 download)
Download or read book New Methods for the Asymmetric Synthesis of Nitrogen Containing Heterocycles written by Giada Arena and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jacques Royer
Publisher : John Wiley & Sons
ISBN 13 : 3527625518
Total Pages : 425 pages
Book Rating : 4.5/5 (276 download)
Download or read book Asymmetric Synthesis of Nitrogen Heterocycles written by Jacques Royer and published by John Wiley & Sons. This book was released on 2009-08-04 with total page 425 pages. Available in PDF, EPUB and Kindle. Book excerpt: Here, all aspects of the topic are presented in a compact manner. The book is clearly structured, and divided into two sections -- asymmetric synthesis of heterocycles containing only one nitrogen and that of those with more than one nitrogen as a heteroatom -- such that the necessary information may be found at a glance. The international team of authors provides important experimental procedures, including industrial applications. Essential for synthetic chemists in pharmaceutical and agrochemical chemistry.
Author : Ana Maria Faisca Phillips
Publisher : John Wiley & Sons
ISBN 13 : 1119757126
Total Pages : 759 pages
Book Rating : 4.1/5 (197 download)
Download or read book More Synthetic Approaches to Nonaromatic Nitrogen Heterocycles, 2 Volume Set written by Ana Maria Faisca Phillips and published by John Wiley & Sons. This book was released on 2022-04-04 with total page 759 pages. Available in PDF, EPUB and Kindle. Book excerpt: More Synthetic Approaches to Nonaromatic Nitrogen Heterocycles An authoritative collection of resources discussing the latest trends in the synthesis of nonaromatic nitrogen heterocycles Widely distributed in nature, nitrogen heterocycles are extremely common in synthetic substances found in pharmaceuticals, agrochemicals, and materials. The literature is evolving rapidly and explores newly emerging structures and medicines. More Synthetic Approaches to Nonaromatic Nitrogen Heterocycles offers R&D professionals the opportunity to easily access a collection of the latest relevant research in the area. In the second two-volume set of this practical reference distinguished researcher Dr. Ana Maria M. M. Faisca Phillips delivers a collection of resources focusing on the newest and most widely applicable trends emerging in synthetic strategies for nonaromatic nitrogen heterocycles. With coverage of topics including organocatalysis, cascade reactions, flow chemistry in synthesis, cycloaddition reactions, metathesis, cross-coupling reactions, and electrochemistry, the book provides quick access to critical new avenues of synthesis. More Synthetic Approaches to Nonaromatic Nitrogen Heterocycles: Volume 1 and 2 also offers readers: A thorough introduction to recent advances in the design and synthesis of cyclic peptidomimetics Comprehensive explorations of fused heterocycles and transition metal promoted synthesis of isoindoline derivatives Practical discussions of 1,4-diazepane ring-based systems and recent advances in the synthesis of azepane-based compounds In-depth examinations of strained aziridinium ions, asymmetric organocatalysis in alternative media, and the electrochemical synthesis of non-aromatic N-heterocycles Perfect for academic and industrial researchers in organic chemistry and synthesis, organometallic chemistry, pharmaceutical chemistry catalysis, and sustainable chemistry, More Synthetic Approaches to Nonaromatic Nitrogen Heterocycles: Volume 1 and 2 is an indispensable reference for anyone seeking an authoritative source of information on new and emerging trends in synthesis.
Author : HUI Qiu
Publisher :
ISBN 13 :
Total Pages : 158 pages
Book Rating : 4.:/5 (128 download)
Download or read book NEW METHODOLOGIES FOR THE ASYMMETRIC SYNTHESES OF AMINES AND NITROGEN HETEROCYCLES FROM ENANTIOPURE SULFINIMINES (N-SULFINYL IMINES) written by HUI Qiu and published by . This book was released on 2009 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this research was to development new methodologies for the asymmetric syntheses of amine and natural products from enantiopure sulfinimines (N-sulfinyl imines). In this context, new methods was devised for the asymmetric synthesis of 2,5-cis and trans-disubstituted pyrrolidines from 3-oxo pyrrolidine 2-phosphonates, prepared by an intramolecular metal carbenoid N-H insertion from a sulfinimine derived delta-amino-alpha-diazo- beta-ketophosphonate. Horner-Wadsworth-Emmos reaction of the 3-oxo pyrrolidine 2-phosphonates and aldehydes provided pyrrolidine enones. Hydrogenation (Pd/H2) of the pyrrolidine enones gave cis-2,5-disubstituted pyrrolidines. Luche reduction the pyrrolidine enones followed by a TFA-NaBH3CN mediated hydroxy directed reduction provided the 2,5-trans products. (+)-Preussin, a potent antiviral and antitumor agent was prepared in 9 steps in 28% overall yield from the sulfinimine. An acid catalyzed intramolecular Mannich cyclization of a sulfinimine-derived N-sulfinyl syn-alpha-methyl-beta-amino ketones was employed for the asymmetric synthesis of 2,3,5,6-tetrasubstituted piperidinones. The beta-amino ketones were prepare by treatment of prochiral lithium Weinreb amide enolates with enantiopure (E)-N-(4-(benzyloxy)butylidene)-2,4,6-triisopropylbenzenesulfinamide. This new methodology was highlighted in the first asymmetric synthesis of the poison frog alkaloid (-)-indolizidine 221T. By manipulation of water concentration in tetrahydrofuran, syn- and anti-2,3-diamino esters were prepared by treatment of the lithium enolate of N-(diphenylmethylene) glycine ethyl ester with sulfinimines. Anhydrous THF afforded enantiopure syn-2,3-diamino esters with a syn/anti selectivity of better than 25:1. In a THF-H2O the anti-2,3-diamino esters were formed. The mechanism involves the generation of H2O-LDA species in the formation of enolate which inhibited the retro-Mannich fragmentation in the diamino ester species. (SR,2S,3R)-(-)-Ethyl-2-(N,N-dibenzylamino)-3-N-(p-toluenesulfinyl)amino-pent-4-enoate was employed in an improved total synthesis of the anti-tumor antibiotic (-)-agelastatin A. A series of N-sulfinyl aza-Morita-Baylis-Hillman products were prepared by addition of vinylaluminum and N-methylmorpholine-N-oxide reagents to enantiopure N-(p-toluenesufinyl)- and N-(2-methypropanesulfinyl)-derived sulfinimines from the least hindered direction via a non-chelation control mechanism. Hydrogenation of the these acrylates with a rhodium(I) catalyst afforded anti-alpha-substituted-beta-amino esters with a anti/syn selectivity of better than 17:1. This new methodology is useful for the asymmetric synthesis of anti-alpha-alkyl-beta-amino esters, which are valuable chiral building blocks for the preparation of biologically active nitrogen-containing natural products.
Author : Massimo S. Stiavelli
Publisher : Wiley-VCH
ISBN 13 : 9783527627363
Total Pages : 230 pages
Book Rating : 4.6/5 (273 download)
Download or read book From First Light to Reionization written by Massimo S. Stiavelli and published by Wiley-VCH. This book was released on 2009-06-29 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: This up-to-date and concise account of a critical period of the early universe directly links the latest theories and experiments. Targeted at cosmological problems rather than specific methods, it begins with an introduction reviewing the early universe and looks at why reionization is important. The process of reionization analyzes simple analytical considerations and compares existing observations, while a further chapter describes some of the issues regarding the transition from Population III to Population II stars, as well as the constraints that can be derived from WMAP. Further chapters survey the latest numerical modeling and future perspectives for studying the dark ages using galaxies as probes. Written by a scientist with much experience in both research and writing, this account is equally suitable for young researchers as well as master and PhD students.
Author : El Sayed H. El Ashry
Publisher : John Wiley & Sons
ISBN 13 : 1405144793
Total Pages : 464 pages
Book Rating : 4.4/5 (51 download)
Download or read book Synthesis of Naturally Occurring Nitrogen Heterocycles from Carbohydrates written by El Sayed H. El Ashry and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbohydrates are widely distributed in nature and widely available, and so are considered as a promising feedstock for the preparation of many organic chemical compounds. They are particularly useful in the preparation of nitrogen heterocycles because of their related structural characteristics and easy availability. Synthesis of Naturally Occurring Nitrogen Heterocycles from Carbohydrates will review the recent literature dealing with use of carbohydrates as raw materials in the synthesis of these materials. The text contains six chapters arranged according to the complexity of the heterocyclic compounds discussed, ranging from five to seven membered rings and from single to multiple fused rings. The book provides a detailed discussion of the various synthetic approaches to these compounds, using carbohydrate starting materials, and does not merely reference synthetic methodology but attempts to give as much detail as possible on the actual experimental conditions used, in such a way that the chemist can use the information directly to design a multi-step synthesis. It discusses the different approaches to the synthesis of a wide range of naturally occurring nitrogen heterocycles in a format that enables the reader to make comparisons and decisions on whether to use a certain procedure, to modify it, or to devise a new synthetic methodology.
Author : Alan Bernard Treacy
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (61 download)
Download or read book Nitrogen Heterocycles in Asymmetric Synthesis written by Alan Bernard Treacy and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Matthew Paul Brichacek
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (671 download)
Download or read book New Methods for the Synthesis of Oxygen and Nitrogen Containing Heterocycles written by Matthew Paul Brichacek and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A single synthetic method rarely is sufficient to provide universal access to a chemical structure class. This realization forces organic chemists to devise and develop new methods. The copper catalyzed ring expansion of vinylaziridines produces nitrogen containing heterocycles commonly found in pharmaceuticals and natural products. This reaction is described from its initial discovery, through optimization, to application. Many substitution patterns and functional groups were tested and the reaction was found to be quite tolerant. By controlling the aziridine and olefin stereochemistry the selective synthesis of either cis or trans 2,5dihydropyrroles was achieved. Likewise, vinyloxiranes were stereoselectively converted to cis- or trans-2,5-dihydrofurans. Furthermore, the asymmetric synthesis of 2-substituted-2,5-dihydrofurans was achieved using chirality transfer characteristic of a [1,3]- sigmatropic rearrangement. This method was further tested by completing the total synthesis of natural products goniothalesdiol and varitriol.
Author : Gianfranco Favi
Publisher : MDPI
ISBN 13 : 3036503404
Total Pages : 372 pages
Book Rating : 4.0/5 (365 download)
Download or read book Modern Strategies for Heterocycle Synthesis written by Gianfranco Favi and published by MDPI. This book was released on 2021-03-17 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heterocycles feature widely in natural products, agrochemicals, pharmaceuticals and dyes, and their synthesis is of great interest to synthetic chemists in both academia and industry. The contributions of recent applications of new methodologies in C–H activation, photoredox chemistry, cross-coupling strategies, borrowing hydrogen catalysis, multicomponent and solvent-free reactions, regio- and stereoselective syntheses, as well as other new, attractive approaches for the construction of heterocyclic scaffolds are of great interest. This Special Issue is dedicated to featuring the latest research that is ongoing in the field of heterocyclic synthesis. It is expected that most submissions will focus on five- and six-membered oxygen and nitrogen-containing heterocycles, but structures incorporating other rings/heteroatoms will also be considered. Original research (communications, full papers and reviews) that discusses innovative methodologies for assembling heterocycles with potential application in materials, catalysis and medicine are therefore welcome.
Author : He Xu
Publisher :
ISBN 13 :
Total Pages : 614 pages
Book Rating : 4.:/5 (489 download)
Download or read book Asymmetric Synthesis of Nitrogen-containing Heterocycles Via Enaniopure Sulfinimines written by He Xu and published by . This book was released on 2007 with total page 614 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Dieter Enders
Publisher : John Wiley & Sons
ISBN 13 : 3527314733
Total Pages : 472 pages
Book Rating : 4.5/5 (273 download)
Download or read book Asymmetric Synthesis with Chemical and Biological Methods written by Dieter Enders and published by John Wiley & Sons. This book was released on 2007-04-09 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: Edited by two of the leading researchers in the field, this book provides a deep, interdisciplinary insight into stoichiometric and catalytic reactions in this continuously expanding area. A plethora of top German scientists with an international reputation covers various aspects, from classical organic chemistry to process development, and from the theoretical background to biological methods using enzymes. Throughout the focus is on the development of new synthetic methods in asymmetric synthesis, the synthesis of natural and bioactive compounds and the latest developments in both chemical and biological methods of catalysis, as well as the investigation of special technical and biotechnical aspects.
Author : Mihiro Sunose
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (594 download)
Download or read book Asymmetric Methods for Functionalisation of Nitrogen Heterocycles written by Mihiro Sunose and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : C.J. Moody
Publisher : Elsevier
ISBN 13 : 0080560768
Total Pages : 241 pages
Book Rating : 4.0/5 (85 download)
Download or read book Advances in Nitrogen Heterocycles written by C.J. Moody and published by Elsevier. This book was released on 1999-01-19 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains a range of topics such as the activation and manipulation of pyrroles, the synthesis of annelated pyrroles using acylation reactions and the synthesis of kainoids, a family of highly biologically active nitrogen heterocycles.
Author : Navjeet Kaur
Publisher : Elsevier
ISBN 13 : 0323994938
Total Pages : 232 pages
Book Rating : 4.3/5 (239 download)
Download or read book Raney Nickel-Assisted Synthesis of Heterocycles written by Navjeet Kaur and published by Elsevier. This book was released on 2022-04-04 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Raney Nickel-Assisted Synthesis of Heterocycles covers the synthesis of heterocycles using Raney nickel. The book focuses on the use of Raney-Ni, a common catalyst in hydrogenation reaction and its uses in the synthesis and preparation of heterocycles. Furthermore, it explains how the development of new approaches and strategic deployments in known approaches for the formation of complex heterocyclic compounds continue to drive the field of synthetic organic chemistry, along with updates on efforts to prepare heterocycles through the development of new and efficient synthetic transformations. Heterocyclic chemistry is an inexhaustible source of novel compounds, providing the most diverse chemical, physical and biological properties through the design of a wide range of combinations of carbon, hydrogen and heteroatoms. Significant focus has been paid to novel approaches to the formation of heterocyclic compounds, which are of practical use acting as modifiers and additives in a wide range of industries such as reprography, plastics, cosmetics, vulcanization accelerators, solvents, antioxidants and information storage. - Presents complete coverage of Raney Nickel assisted reactions - Includes the discovery, reactivities, advantages, disadvantages and other characteristics of Raney nickel - Presents new methodologies for the synthesis of heterocycles
Author : Galal H. Elgemeie
Publisher : Elsevier
ISBN 13 : 0128221828
Total Pages : 523 pages
Book Rating : 4.1/5 (282 download)
Download or read book N-Sulfonated-N-Heterocycles written by Galal H. Elgemeie and published by Elsevier. This book was released on 2022-08-30 with total page 523 pages. Available in PDF, EPUB and Kindle. Book excerpt: N-Sulfonated-N-Heterocycles covers the synthesis, chemistry and biological applications of these compounds, focusing on pioneering synthetic approaches, mechanistic insights and their limitations, as well as recent advances in this field. The synthesis of some of N-sulfonated N-heterocycles and their transformation to other useful cyclic and acyclic compounds are discussed, as well as their uses as useful intermediates in the preparation of polymeric and medicinal materials. This book includes detailed methods and protocols, and the focus on applications makes this resource an essential guide for all researchers in the area of organic, medicinal and polymeric synthetic study. - Reviews the use of N-sulfonated N-heterocycles as important precursors for the synthesis of biologically active compounds - Includes information on synthetically useful transformations of N-sulfonated N-heterocycles - Covers a wide synthetic methods used for an important branch of heterocycles and their biological evaluation in detail - Features over 500 schemes to illustrate different synthetic pathways and reactions of N-sulfonated N-heterocycles
