Synthetic Multidentate Macrocyclic Compounds

Synthetic Multidentate Macrocyclic Compounds attempts to bring together selected chapters in which the authors discuss in depth investigations in important areas of macrocycle research. The chapters deal mainly with macrocyclic compounds (saturated polyethers and their derivatives), and macrobicyclic compounds (cryptates). The book contains six chapters and opens with a first-hand account of the initial synthesis of the cyclic polyethers. This is followed by separate chapters on the synthesis of cyclic polyethers, polyether amines, and polyether sulfides; the synthesis of multidentate compounds; and the structure of synthetic macrocyclic compounds and their cation complexes. Subsequent chapters deal with the rates of reactions and the mechanism by which synthetic macrocyclic ligands complex substrates in solution; and commercial applications of the synthetic macrocyclic ligands. This book is primarily aimed at researchers and students in organic, physical, analytical, and inorganic chemistry, and in chemical engineering. However, it will also be of interest to many in the areas of biology, biochemistry, and physiology. Extensive literature references are found in each chapter.

The recent literature on the kinetic properties of a variety of synthetic multidentate macrocyclic compounds has been reviewed and discussed. At the beginning of this chapter, a brief discussion of kinetic and mechanistic studies of antibiotics has been reviewed. Then the synthetic macrocyclic compounds are treated within the framework of their different classes; i.e. crown ethers, cryptates and macrocyclic tetramines. In addition to a review of the kinetic research, attempts were made to clarify certain aspects of the literature and to discuss similarities and differences between the various classes. Finally, the last section discusses possible kinetic studies of more novel Host molecules designed and synthesized by Cram.

The synthesis of macrocycles is an art in itself. Template-controlled synthesis provides elegant access to fascinating macrocyclic structures. Polyazamacrocycles, crown ethers, cryptands, rotaxanes, knots -- the range of macrocyclic compounds is as broad as their potential application as molecular switches, in ion exchange, electron transfer or catalysis. This book provides authoritative information on all aspects of template-controlled macrocyclizations. It covers in depth the current state of research on template processes - novel synthetic techniques and mechanistic approaches. The critical discussion of the diverse synthetic routes includes the detailed characterization of the broad variety of macrocyclic products. References to applications of macrocyclic compounds and over 1,500 citations make this handbook an indispensable tool for chemists in academia and industry. Researchers in organic and supramolecular chemistry, biotechnology, and inorganic chemistry will find inspiration for the design, synthesis, and myriad uses of new synthetic macrocycles.

The scientific and practical interest in coronands (crown ethers), cryptands, podands as complexing agents for cations as well as for anions and neutral low molecular species is undeniable 1,2). The chemistry of crown compounds is steadily increasing. About 250 original papers dealing with crown chemistry appeared only in 1980. New molecules· with crown ether properties are constantly synthesized and new applications discov,?red. Owing to lack of space, only a small number of the original publications is men tioned here. Thus, in the literature compilation only some, but relevant works are selected for each chapter. Whenever possible, reference is made to reviews or review-like articles alone by means of which origin,al works can be consulted. The reviews given under ref. 1) are considered to be the most relevant. The formulae presented in the figures should be understood as representative structures outlining a specific field. 2 Classification of Oligo-/Multidentate Neutral Ligands and of their Complexes Today, a distinction is made between the classical ring oligoethers (crown ethers) and monocyclic coronands, oligocyclic spherical cryptands and the acyclic podands with respect to topological aspects 3). This classification and the topology are illustrated in Fig. 1, each figure representing the minimum number of donor atoms and chain segments characteristic of each class of compounds. Multidentate mono cyclic ligands with any type of donor atoms are called coronands ("crown compounds"), while the term crown ether should be reserved for cyclic oligoethers exclusively containing oxygen as donor atom.

The first comprehensive book focusing on synthesis and applications of macrocyclic polyamines and their derivatives Macrocyclic polyamines are a class of widely used important compounds. This is the first book that systematically summarizes the synthesis and applications of macrocyclic polyamines and their analogues, including the properties and synthetic methods of macrocyclic polyamines, chemical nucleases based on macrocyclic polyamines, the derivatives of macrocyclic polyamines as nano-vector materials, macrocyclic polyamines derivatives for bio-imaging, chemical sensors based on macrocyclic polyamines, and other applications of macrocyclic polyamines. Macrocyclic Polyamines: Synthesis and Applications includes most of the studies involving macrocyclic polyamines and their derivatives, and may be used as a reference for the researchers in related fields. It offers in-depth coverage of cyclization modes; special procedures for tetraza macrocyclic compounds; diacids-diamines condensation; oxidative DNA cleaving by macrocyclic polyamines; lipids with cationic MPA headgroups; the derivatives of DOTA, DO3A, and PCTA; receptors for anions; sensors for bioactive molecules; macrocyclic polyamines for solvent extraction and membrane transport of amino acids and their derivatives, electrophoretic separation, and open-tubular CEC; and much more. ?The first book that systematically summarizes the chemistry of macrocyclic polyamines and their derivatives in terms of synthetic methods for their preparation, functionalization, and application in the main fields of chemical sensors, chemical nucleases, drug-delivery, bio-imaging and vector materials ?Provides a comprehensive reference for the researchers working on macrocyclic polyamines ?Offers train of thought in related research fields such as organic chemistry, coordination chemistry, analytical chemistry, supramolecular chemistry, biomaterials, etc. Macrocyclic Polyamines: Synthesis and Applications will not only provide a reference for the researchers working on macrocyclic polyamines, but also offer opportunities for researchers in related research fields to understand the benefits of these key compounds.

This book contains an overview of complex formation by macrocyclic ligand systems. The study of macrocyclic chemistry represents a major area of activity which impinges on a range of other areas in both chemistry and biochemistry. The field has characteristically yielded many interesting and unusual compounds. The text discusses the structures and properties of macrocyclic compounds; the synthesis of macrocycles; polyether crown and related systems; metal-ion and molecular recognition (host-guest chemistry); as well as kinetic, thermodynamic and electrochemical aspects of a range of macrocyclic systems. A discussion of the different categories of naturally occurring macrocycles is also included. Specialist and non-specialist alike will find this a useful text. Apart from serving as a convenient reference for established workers in the field, it should also prove useful to new graduate students as well as to researchers from other areas who seek a general introduction to the subject. The topics discussed also provide a suitable basis for a senior undergraduate or graduate course in macrocyclic chemistry and inorganic complexes.

This reference describes standard and nonstandard coordination modes of ligands in complexes, the intricacies of polyhedron-programmed and regioselective synthesis, and the controlled creation of coordination compounds such as molecular and hn-p-complexes, chelates, and homo- and hetero-nuclear compounds. It offers a clear and concise review of modern synthetic techniques of metal complexes as well as lesser known gas- and solid-phase synthesis, electrosynthesis, and microwave and ultrasonic treatment of the reaction system. The authors pay special attention to o-hydroxyazomethines and their S-, Se-containing analogues, b-diketones, and quinines, among others, and examine the immediate interaction of ligands and metal salts or carbonyls.