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Elements of Synthesis Planning

  • Textbook
  • © 2009

Overview

Authors:
  1. R.W. Hoffmann

    1. Phillips Universität Marburg FB Chemie, Germany

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  • The subject is treated in a concise, focussed manner to keep the book short
  • Needed by every organic chemist
  • Includes problems and solutions
  • Extended list of references included
  • Includes supplementary material: sn.pub/extras

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Table of contents (13 chapters)

  1. Front Matter

    Pages I-X
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  2. Introduction

    • R.W. Hoffmann
    Pages 1-7

  3. Functional Group Oriented Bond-Sets

    • R.W. Hoffmann
    Pages 9-45

  4. Skeleton Oriented Bond-Sets

    • R.W. Hoffmann
    Pages 47-63

  5. Building Block Oriented Synthesis

    • R.W. Hoffmann
    Pages 65-71

  6. The Basis for Planning

    • R.W. Hoffmann
    Pages 73-80

  7. Formation of Cyclic Structures

    • R.W. Hoffmann
    Pages 81-117

  8. Protecting Groups

    • R.W. Hoffmann
    Pages 119-131

  9. Ranking of Synthesis Plans

    • R.W. Hoffmann
    Pages 133-144

  10. Computer-Aided Synthesis Planning

    • R.W. Hoffmann
    Pages 145-148

  11. Stereogenic Centers and Planning of Syntheses

    • R.W. Hoffmann
    Pages 149-163

  12. Enjoying the Art of Synthesis

    • R.W. Hoffmann
    Pages 165-201

  13. Summary and Concluding Remarks

    • R.W. Hoffmann
    Pages 203-205

  14. Solutions to Problems

    • R.W. Hoffmann
    Pages 207-224

  15. Back Matter

    Pages 225-227
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Keywords

About this book

Synthesis is at the core of organic chemistry. In order for compounds to be studied—be it as drugs, materials, or because of their physical properties— they have to be prepared, often in multistep synthetic sequences. Thus, the target compound is at the outset of synthesis planning. Synthesis involves creating the target compound from smaller, readily available building blocks. Immediately, questions arise: From which bui- ing blocks? In which sequence? By which reactions? Nature creates many highly complex “natural products” via reaction cascades, in which an asso- ment of starting compounds present within the cell is transformed by speci c (for each target structure) combinations of modular enzymes in speci c - quences into the target compounds [1, 2]. To mimic this ef ciency is the dream of an ideal synthesis [2]. However, we are at present so far from - alising such a “one-pot” operation that actual synthesis has to be achieved via a sequence of individual discrete steps. Thus, we are left with the task of planning each synthesis individually in an optimal fashion. Synthesis planning must be conducted with regard for certain speci - tions, some of which are due to the structure of the target molecule, and some of which relate to external parameters such as costs, environmental compatibility, or novelty. We will not consider these external aspects in this context. Planning of a synthesis is based on a pool of information regarding chemical reactions that can be executed reliably and in high chemical yield.

Reviews

From the reviews:

“The text is recommended for those with a strong foundation in organic chemistry. … The book would be quite helpful for those who plan syntheses on a regular basis … . The text is a useful addition to the library of any synthetic organic chemist or to select undergraduate and graduate curricula. … Readers will certainly learn more about the chemistry, the logic, and the art of planning a novel synthesis and contributing to a vast and interesting field.” (Bridget G. Trogden, Journal of Chemical Education, Vol. 88, 2011)

From an undergraduate learning perspective the concept of synthesis planning or retrosynthesis can appear to be a daunting prospect. The idea of being asked to think backwards for many is a big leap, despite the vast majority already possessing a well-stocked chemical toolbox and being more than capable to explain a multitude of complex mechanistic transformations. In Elements of synthesis planning, a reworked translation of his original German text, Reinhard Hoffmann sets out to 'demystify' the art of synthetic planning, which is an essential and vital skill practised every day throughout the worldwide organic chemistry community. 

In 12 clear and logical chapters, Hoffmann takes the reader from the basic concepts of retrosynthesis (use of synthons, identifying key bond disconnections, unmasking symmetry elements etc) to dedicated chapters on the application of chiral building blocks, strategic planning of complex synthetic sequences and the synthesis of polycyclic ring systems. In the final chapter, all these concepts are brought together to elegantly compare several individual approaches to one of five representative natural products, highlighting the tactics and strategies employed.  

As such, this text would ideally complement an advanced undergraduate course on complex organic synthesis, which is beyond the level of most standard organic chemistrytextbooks. It would also prove highly useful to postgraduates at the beginning of their research careers in synthesis to inspire creativity and maybe put their ideas into practice. 

Gordon Florence , Chemistry World, 2009, 6(8), p. 63

Authors and Affiliations

  • Phillips Universität Marburg FB Chemie, Germany

    R.W. Hoffmann

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