Cephalosporins and Penicillins


Book Description

Cephalosporins and Penicillins: Chemistry and Biology describes the studies made on cephalosporin in relation to the scientific and medicinal benefits that can be derived from cephalosporin C. This collection discusses how cephalosporin C is produced through modern isolation methods. One paper discusses its structure through chemical means, its degradation products, its derivative and other metabolic products such as penicillin N and cephalosporin P. Another paper explains the preparation method for 7-aminocephalosporanic acid and 6-aminopenicillanic acid through biological or chemical means. Another paper explains the alteration of the dihydrothiazine ring of the cephalosporins as the functionalities of these rings are chemically difficult to obtain. One paper also explains the rearrangements of cephalosporins and penicillins; cephalosporin can be synthesized from penicillin through an intermediacy of penicillin sulfoxide. Other papers discuss the pharmacology and toxicology of cephalosporins, as well as the practical tests and methods of assay that can be used in most cephalosporins, and in some cases, in penicillins. This book can prove useful for pharmacologists, microchemists, research workers, and technologists dealing with toxicology.







Penicillins and Cephalosporins


Book Description

Chemistry and Biology of ?-Lactam Antibiotics, Volume 1: Penicillins and Cephalosporins provides information pertinent to the study of antibiotics containing the ?-lactam moiety. This book discusses the occurrence of a group of ?-lactam antibiotics structurally related to cephalosporin C. Organized into five chapters, this volume begins with an overview of the mechanism of action of ?-lactam antibiotics that caused many microbiologists to develop screening tools for the detection of the ?-lactam moiety. This text then discusses the discovery of the nocardicins, the thienamycins, and olivanic acids. Other chapters provide a summary of the essential penicillin sulfoxide chemistry that gave rise to many compounds. This book discusses as well the ability of chemists to predict the level of biological activity of a compound from knowledge of its structure through theoretical and physicochemical studies. The final chapter deals with quantitative structure–activity relationships. This book is a valuable resource for microbiologists, chemists, and scientists.







Synthesis of β-Lactam Antibiotics


Book Description

Penicillins and cephalosporins have a long history in combating bacterial infections. Despite new infectious diseases and occurring resistance, beta-lactam antibiotics will for many years to come continue to play a prominent role in our therapeutic arsenal. This book covers the industrial development of the chemical and biochemical processes used to manufacture these products, as well as looking ahead to possible future processes. The interplay between synthetic organic chemistry with the understanding and application of enzymes, modeling of fermentation processes and integration through (bio-) chemical process engineering is illustrated. In-depth scientific approaches to biocatalysis and biocatalyst development including enzyme kinetics, enzyme crystal studies and semi-rational enzyme mutations are also presented. Metabolic pathway analysis and modeling of fermentation process are treated as well as molecular precision in synthetic approaches to beta-lactams, their precursors and derivatives. Process technology studies including new reactor concepts, possible short-cut routes and improved down-stream-processing methods complete a broad view on the scope and limitations of the presently developed industrial processes including an intriguing insight into future process possibilities. This book represents an excellent case study on the transformation of traditional, stoïchiometric, organic synthesis and classical fermentations into modern (bio-) catalysis and biosynthesis based on insights in metabolic pathways and enzyme actions.










The Chemistry of β-Lactams


Book Description

It is over sixty years since Alexander Fleming observed antibiosis between a Penicillium mould and bacterial cultures and gave the name penicillin to the active principle. Although it was proposed in 1943 that penicillin (1) contained a tJ-Iactam ring, this was not generally accepted until an X-ray crystallographic determination of the structure had been completed. RCONH )=r)