Bøger af Navjeet Kaur

Synthesis of Aziridines and Oxaziridines from Imines describes both new and old methods for the synthesis of aziridines from imines and covers an important and rapidly growing branch of heterocyclic chemistry. Readers will have access to different methods and information allowing them to evaluate which method is most suitable for particular cases. Several important advances in this area have been witnessed in recent years and discovering efficient novel methods for the synthesis of aziridines has been very active field of research. Its powerful synthetic utility has been described by an overpowering amount of documentation on the approaches for the formation of aziridine. The smallest possible saturated azaheterocycle, aziridine, is well-known to organic chemists for its tremendous potential in pharmaceutical chemistry and organic synthesis. The general biological importance of aziridines is proven by the fact that they found several uses as subunits in pharmacologically active compounds such as antitumor agents, enzyme inhibitors, and antibiotics. Although aziridines are highly reactive, this framework occurs in many synthetic compounds and the natural products of biological interest also contain aziridine skeleton in their structures.

3-Membered Heterocycle Synthesis provides readers with detailed information about the synthesis of three-membered heterocyclic compounds. The book comprehensively describes three-membered heterocyclic compounds synthesis, allowing the audience to quickly assess possible synthetic approaches. Other sections discuss their unusual combination of synthetic flexibility, reactivity, and atom economy. The main challenge for synthetic chemists, both in academia and industry, is the search for efficient approaches to target molecules. This book presents several methodologies for the synthesis of three-membered heterocyclic compounds.

Synthesis of Five-Membered Heterocycles: Role of DMF as Solvent, Reagent, Catalyst, and Stabilizer helps readers quickly assess possible synthetic approaches. The book's audience, researchers, academic professionals and synthetic chemists both in industry and academia will find detailed information about the synthesis of five-membered heterocyclic compounds using dimethylformamide. Over the years, heterocyclic compounds, especially five-membered, have drawn more attention of pharmaceutical community because of their therapeutic value. The formation of heterocyclic compounds has turned out to be the keystone of synthetic organic chemistry. Dimethylformamide has played an important role in organic synthesis for a long time, and it is frequently utilized as a common solvent for chemical reactions and broadly used in industry as a reagent. It is a unique chemical and can play three other roles in organic chemistry, i.e., as stabilizer, reagent and catalyst. Due to its structure, DMF can participate in several reactions as a versatile building block for several units.

This book focuses on the new and old methods for the synthesis of various heterocycles using Lawesson¿s reagent. The book covers an important and rapidly growing branch of heterocyclic chemistry and can serve as a guide to those who are completing their education and are about to enter the job market. Students will be able to find all Lawesson¿s reagent-assisted protocols for the synthesis of heterocycles in one place. This feature of the book provides an important benefit, because sometimes users want to see all the possibilities and relevant information for making a particular compound using one particular reagent. The purpose of this valuable resource is to provide the knowledge not only to students but also to pharmacologists, biochemists, organic and medicinal chemists, researchers, and academic professionals for easy access to synthetic protocols for different heterocycles using Lawesson¿s reagent. The book will be greatly helpful for everyone involved inthe field and can pave the way for better understanding and quantification of heterocycle synthesis.

Oxetane Synthesis rings play an important role as versatile motifs both in the overall formation of natural products and in synthetic organic chemistry. Oxetanes are important motifs in pharmaceutical chemistry that can confer improved metabolic and physicochemical properties. These developments continue to enhance the use of oxetanes in medicinal chemistry. Thanks to the growing commercial accessibility of oxetane possessing building blocks, together with improved approaches for the formation, oxetanes are likely to be progressively utilized in medicinal chemistry programs. Oxetanes are becoming valuable as a result of their vast diversity of uses in medicinal chemistry and varying applications. Several procedures have been developed for the formation and ring-opening of oxetanes to give important compounds in agrochemical, medicinal and material sciences. Novel approaches have been developed for the synthesis of oxetanes. These methods depend on both established synthetic approaches and development of many novel approaches for the formation of oxetanes.

Iodine-Assisted Synthesis of Six- and Seven-Membered Heterocycles covers both existing and the latest methods for the synthesis of various six- and seven-membered heterocycles using iodine. Covering an important and rapidly growing branch of heterocyclic chemistry, this book allows users easy access to the synthetic protocols for the synthesis of heterocycles, acting as a guide for how to make these important compounds employed as agrochemicals, pharmaceuticals, and veterinary products, using particular reagents. This book will be of interest to students, pharmacologists, biochemists, and organic and medicinal chemists.

Synthesis of Azetidines from Imines by Cycloaddition Reactions presents several methodologies for the synthesis of azetidines from imines by cycloaddition reactions.  The azetidines, known as important contribution of science to humanity, are important organic compounds that have occupied a basic position in the pharmaceutical chemistry for over a hundred years because of their biological activities. They are the fundamental skeleton of several antibiotics, probiotics and alkaloids. The synthesis of azetidines is a constant challenge for medicinal chemists, hence this book comprehensively describes azetidine ring synthesis. With this book, readers will be able to quickly assess possible synthetic approaches and evaluate whether preparation of a four-membered nitrogen containing ring is reasonable.

Heterocyclic frameworks represent the main structural subunits of many biologically active compounds and natural products. The ability of heterocycles to act both as reactive pharmacophores and biomimetics has greatly contributed to their unique value as traditional key elements of various drugs. The contemporary developments in process chemistry and discovery emphasize novel sustainable synthetic pathways as fast and ecologically acceptable alternatives to the traditional protocols. The development of sustainable synthetic process to substitute the efficient but somewhat old classical methodologies started many years back and such methodologies are still in high demand.  The increasing demand for fast formation of biologically active molecules has stimulated synthetic researchers to discover and develop smart approaches that inevitably address the very fundamental principles of effectiveness and efficiency. Besides the critical issues of stereo-, chemo-, and regioselectivity, nowadays, these processes also have to account economical and environment concerns of green chemistry. The intellectual difficulty to discover well-designed, concise, and conceptually new synthetic pathways has become a gradually increasing driving force in industry and academia. Since the last few years, chemists are very concerned about the environmental implications of their work. They are trying to develop novel reaction conditions, synthetic strategies, and use of chemicals that minimize risks to environment and humans. The development of harmless, atom efficient, and acid-mediated organic procedures is the most important challenge in green chemistry. While acid catalysis remains the most broadly utilized kind of catalysis, the generally employed acid catalysts continue to pose severe safety and health issues. The mild Lewis acidity of I2 has increased its applicability for many organic reactions.

This book includes three chapters (from chapter III-V). Chapter I and II are already published under the title ¿An overview of indazoles and its synthetic intermediates¿.Chapter III describes the synthesis of pyrazolo and isoxazolo fused derivatives of 7,8,9-trihydropyrazolo[4,5-b]carbazol-6(3H)-one and 9-benzyl-7,8-dihydropyrazolo[4,5-b]azacarbazol 6(3H)-one. Chapter IV is concerned with the synthesis of pyrimidine ring incorporated derivatives of 7,8, 9-trihydropyrazolo[4,5-b]carbazol-6(3H)-one from oxo-ketenedithioacetals, chalcones, dimethylamino methylene ketones and enolic ethers of carbazole annulated pyrazoles. Chapter V is related with the synthesis of benzodiazepino, benzothiazepino and quinolino condensed 7,8,9-trihydropyrazolo[4,5 b]carbazol-6(3H)-one and 9-benzyl 7,8-dihydropyrazolo[4, 5-b]-9-azacarbazol-6(3H)-one from oxo-ketenedithioacetals and chalcones derived from carbazolo annulated pyrazole and azacarbazolo annulated carbazole.

8-Membered Heterocycle Synthesis focuses on both the new and established methods for the synthesis of various 8-membered heterocycles. 8-membered heterocyclic compounds act as target molecules for a wide range of synthetic studies and are present in a broad range of natural products, showing a wide variety of pharmaceutical and biological properties. Covering an important and rapidly growing branch of heterocyclic chemistry, this book brings together every protocol for the synthesis of 8-membered heterocycles in one place, allowing the reader to see all the possibilities for making a particular compound using one particular reagent.  Providing up-to-date and comprehensive information about the synthesis of medium-ring heterocycles and the latest information on this fast-moving field, with easy access to the synthetic protocols for different 8-membered heterocycles, case studies, and application, this book will be essential reading for students, pharmacologists, biochemists, organic and medicinal chemists, researchers, and academic professionals.

This book focuses on the new and old methods for the synthesis of various heterocycles using Lawesson¿s reagent. The book covers an important and rapidly growing branch of heterocyclic chemistry and can serve as a guide to those who are completing their education and are about to enter the job market. Students will be able to find all Lawesson¿s reagent-assisted protocols for the synthesis of heterocycles in one place. This feature of the book provides an important benefit, because sometimes users want to see all the possibilities and relevant information for making a particular compound using one particular reagent. The purpose of this valuable resource is to provide the knowledge not only to students but also to pharmacologists, biochemists, organic and medicinal chemists, researchers, and academic professionals for easy access to synthetic protocols for different heterocycles using Lawesson¿s reagent. The book will be greatly helpful for everyone involved in the field and can pave the way for better understanding and quantification of heterocycle synthesis.

This book focuses on the use of palladium as a catalyst for the synthesis of heterocylces and describes the formation of heterocyclic rings. It also compiles the recent applications of palladium catalysts in organic synthesis.

This book focuses on the use of palladium as a catalyst for the synthesis of heterocylces and describes the formation of heterocyclic rings. It also compiles the recent applications of palladium catalysts in organic synthesis.