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Chemoselectivity: The Mother of Invention in Total Synthesis

Open access
Shenvi, Ryan A., O’Malley, Daniel P., Baran, Phil S.·2009·Accounts of Chemical Research

Abstract

IUPAC defines chemoselectivity as "the preferential reaction of a chemical reagent with one of two or more different functional groups", a definition that describes in rather understated terms the single greatest obstacle to complex molecule synthesis. Indeed, efforts to synthesize natural products often become case studies in the art and science of chemoselective control, a skill that nature has practiced deftly for billions of years but man has yet to master. Confrontation of one or perhaps a collection of functional groups that are either promiscuously reactive or stubbornly inert has the potential to unravel an entire strategic design. One could argue that the degree to which chemists can control chemoselectivity pales in comparison to the state of the art in stereocontrol. In this Account, we hope to illustrate how the combination of necessity and tenacity leads to the invention of chemoselective chemistry for the construction of complex molecules. In our laboratory, a premium is placed upon selecting targets that would be difficult or impossible to synthesize using traditional techniques. The successful total synthesis of such molecules demands a high degree of innovation, which in turn enables the discovery of new reactivity and principles for controlling chemoselectivity. In devising an approach to a difficult target, we choose bond disconnections that primarily maximize skeletal simplification, especially when the proposed chemistry is poorly precedented or completely unknown. By choosing such a strategy--rather than adapting an approach to fit known reactions--innovation and invention become the primary goal of the total synthesis. Delivery of the target molecule in a concise and convergent manner is the natural consequence of such endeavors, and invention becomes a prerequisite for success.

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Metadata

Authors
Shenvi, R. A., O’Malley, D. P., & Baran, P. S.
Venue
Accounts of Chemical Research
Published
2009-01-30
Volume
42
Issue
4
Pages
530-541
ISSN
  • 0001-4842 (ISSN-L)
  • 1520-4898
OpenAlex
W2078967440
Cited by
334
References
16
FWCI
10.06
Type
journal article
Language
en
Open access
green

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