الصفحة 1
الصفحة 1
Metal Catalyzed Reductive C-C Bond Formation : A Departure from Preformed Organometallic Reagents
The prototypical catalytic reductive C–C bond formations, the Fischer-Tropsch reaction [1] and alkene hydroformylation [2], were discovered in 1922 and 1938, respectively [3,4]. These processes, which involve reductive coupling to carbon monoxide, have long been applied to the industrial manufacture of commodity chemicals [5]. Notably, alkene hydroformylation, also known as the oxo-synthesis, has emerged as the largest volume application of homogeneous metal catalysis, accounting for the production of over 7 million metrictons of aldehyde annually. Despite the impact of these prototypical reductive C–C bond formations, this field of research lay fallow for several decades.
Catalytic Carbonylation Reactions
Carbonylation reactions are of major importance in both organic and industrial chemistry. Due to the availability, price and reactivity pattern, carbon monoxide is becoming a more and more important building block for fine and bulk chemicals. The major reaction types of carbon monoxide are comprehensively discussed by leading experts from academia and industry. The authors highlight important carbonylation reactions such as hydroformylation, alkoxy-carbonylations, co/olefin-copolymerization, Pauson-Khand reactions and others. They illustrate applications in organic synthesis and give industrial examples.
Carbon monoxide in drug discovery, basics, pharmacology, and therapeutic potential
Carbon monoxide, one of the smallest organic natural molecules, is widely known for its toxicity. Formation of CO via incomplete combustion is a major contributing factor to accidental or intentional CO poisoning, leading to severe health consequences or death. In addition, CO is a by-product of tobacco smoking, and has been associated with some of the harmful effects of smoking. However, less known and probably far more important is the recognition of the essential physiological roles of CO as a signaling molecule in mammals. Against over more than a century of negative connotation, the last few decades have proven that CO possesses a multitude of physiological roles and therapeutic functions including regulation of the immune response, cellular proliferation, and control of cell survival. This concept is supported by the discovery that CO is produced by all cells and more so under conditions of stress. This book comprehensively summarizes key aspects of CO's endogenous roles, therapeutic functions, and challenges that we face in its development as a therapeutic agent. We hope this preface will provide a thread for reading this book and a birds-eye view of the landscape for understanding this field, and more importantly lay out the challenges ahead in understanding the detailed mechanisms of action of CO and in its development as a therapeutic agent.
