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Encyclopaedia Of Organic Synthesis
Dr. Nand Lal Choudhary
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Naturwissenschaften, Medizin, Informatik, Technik / Chemie
Beschreibung
Organic synthesis is a special branch of chemical synthesis and is concerned with the construction of organic compounds via organic reactions. Organic molecules can often contain a higher level of complexity compared to purely inorganic compounds, so the synthesis of organic compounds has developed into one of the most important branches of organic chemistry. There are two main areas of research fields within the general area of organic synthesis: total synthesis and methodology. A total synthesis is the complete chemical synthesis of complex organic molecules from simple, commercially available (petrochemical) or natural precursors. In a linear synthesisoften adequate for simple structuresseveral steps are performed one after another until the molecule is complete. The chemical compounds made in each step are usually deemed synthetic intermediates. For more complex molecules, a different approach may be preferable: convergent synthesis involves the individual preparation of several ';pieces', which are then combined to form the desired product. Each step of a synthesis involves a chemical reaction, and reagents and conditions for each of these reactions need to be designed to give a good yield and a pure product, with as little work as possible. A method may already exist in the literature for making one of the early synthetic intermediates, and this method will usually be used rather than ';trying to reinvent the wheel'. However most intermediates are compounds that have never been made before, and these will normally be made using general methods developed by methodology researchers. To be useful, these methods need to give high yields, and to be reliable for a broad range of substrates. The encyclopaedia will be of use to the students, researchers and general readers of this subject.
