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Pyrazoles and Reduced and Condensed Pyrazoles, Volume 22
The Chemistry of Heterocyclic Compounds, since its inception, has been recognized as a cornerstone of heterocyclic chemistry. Each volume attempts to discuss all aspects – properties, synthesis, reactions, physiological and industrial significance – of a specific ring system. To keep the series up-to-date, supplementary volumes covering the recent literature on each individual ring system have been published. Many ring systems (such as pyridines and oxazoles) are treated in distinct books, each consisting of separate volumes or parts dealing with different individual topics. With all authors are recognized authorities, the Chemistry of Heterocyclic Chemistry is considered worldwide as the indispensable resource for organic, bioorganic, and medicinal chemists.
Pyrazole: Preparation and Uses
This book has comprehensively reviewed the latest information on pyrazoles, their preparations and uses. It provides extended ideas on pyrazole and its derivatives including their synthesis, chemistry, structure activity relationship (SAR) and therapeutic applications. The health promoting properties of these pyrazoles are discussed in this book with different therapeutic applications of pyrazole scaffold. Topics related to pyrazole and its analogues as potential anticancer, anti-angiogenesis, antiviral, antioxidative, anti-convulsive, anthelmintic, anti-inflammatory, antidiabetic agents are described in this book in detail. Furthermore, current status and future prospects of pyrazole moiety...
Recent Advances in the Synthesis, Functionalization and Applications of Pyrazole
Pyrazoles and their reduced form, pyrazolines, are considered privileged scaffolds in medicinal chemistry, owing to their noteworthy biological activities, physicochemical properties and occurrence in many low-molecular-weight compounds present in several marketed drugs (e.g., Celebrex(R) and Viagra(R)). Pyrazoles are also found in a variety of agrochemicals (fungicides, insecticides, and herbicides) and are versatile compounds for synthetic manipulations. Their challenging chemical structures and properties (mainly tautomerism, with possible implications in their reactivity), and diverse applications, have attracted the attention of many researchers who have developed various synthetic approaches. This reprint presents some examples of the most recent advances in pyrazoles' chemistry, including synthetic methodologies to access novel pyrazole derivatives, to their functionalization, and studies of their properties and applications in different fields, mainly in medicine and materials science.
Pyrazole-Based Drug Discovery
Pyrazole-Based Drug Discovery outlines the complexities of the pyrazole scaffold use in drug discovery, including derivative chemistry, structural properties, methods of synthesis and practical implementations. Designed as a guide for both experts and students working in this and related areas, this volume will facilitate the continued design and development of novel pharmaceuticals based on pyrazole and its derivatives. Heterocyclic compounds are of central importance to medicinal chemistry, as demonstrated by the high percentage of marketable drugs that feature heterocyclic fragments in their structures. As starting points for drug discovery they offer a broad range of attractive propertie...
Synthesis of Pyrazoles
Pyrazolones are traditionally synthesized by the reaction of -keto esters with hydrazine and its derivatives. To date, synthesis of these compounds have been somewhat limited by the available chemistry. The methods available in literature to synthesize -keto esters are suffers by the use of carbon dioxide and carbon monoxide sources in presence of Pd or transition metal catalysts, long reaction time, use of excess reagent, inconsistent yield, large quantity of by products (due to self Claisen condensation) and require tedious work up procedures to remove the same. Unfortunately the existing methods not produced the -ketoesters of heteroaryl compounds from the heteroaryl esters in good yield. These factors lead us to develop a simple, convenient method to synthesize -keto esters which in turn converted into their corresponding pyrazoles. The synthesis of -oxy/thio substituted -keto esters through cross-Claisen condensation which suffers by many draw-backs, also been improved by new methodology. The newly synthesized compounds were subjected to screen their biological activities and the results discussed."
Recent Advances in the Synthesis, Functionalization and Applications of Pyrazole-Type Compounds II
Pyrazoles are considered privileged structures in medicinal chemistry due to their remarkable biological activities and occurrence in many low-molecular-weight compounds present in several marketed drugs (e.g., Celebrex(R) and Viagra(R)). Pyrazoles are also found within a variety of agrochemicals (fungicides, insecticides, and herbicides) and are versatile scaffolds for synthetic manipulations. The structural features of pyrazoles (mainly tautomerism, with possible implications for their reactivity), as well as their diverse applications, have stimulated the work of several research groups towards the synthesis and functionalization of pyrazole-type compounds and the study of their propertie...
