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Preparation and Use of Samarium Diiodide (SmI2) in Organic Synthesis: The Mechanistic Role of HMPA and Ni(II) Salts in the Samarium Barbier Reaction

Published on: February 4, 2013

Selective reductive transformations using samarium diiodide-water.

Michal Szostak1, Malcolm Spain, Dixit Parmar

  • 1School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom.

Chemical Communications (Cambridge, England)
|September 1, 2011
PubMed
Summary
This summary is machine-generated.

Samarium diiodide (SmI(2)) with water additive enables new selective chemical reactions. This review highlights recent advances and mechanistic insights into SmI(2)-H(2)O systems.

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Chemoselective Preparation of 1-Iodoalkynes, 1,2-Diiodoalkenes, and 1,1,2-Triiodoalkenes Based on the Oxidative Iodination of Terminal Alkynes
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Chemoselective Preparation of 1-Iodoalkynes, 1,2-Diiodoalkenes, and 1,1,2-Triiodoalkenes Based on the Oxidative Iodination of Terminal Alkynes

Published on: September 12, 2018

Area of Science:

  • Organic Chemistry
  • Inorganic Chemistry
  • Catalysis

Background:

  • Samarium diiodide (SmI(2)) is a crucial electron transfer reagent in organic synthesis.
  • Additives and co-solvents significantly influence SmI(2) reactivity and selectivity.
  • Water has become a key additive, expanding the scope of SmI(2)-mediated reactions.

Purpose of the Study:

  • To review recent advancements in the application of samarium diiodide-water (SmI(2)-H(2)O) systems.
  • To emphasize mechanistic understanding of these reactions.
  • To highlight the development of novel chemical transformations using SmI(2)-H(2)O.

Main Methods:

  • Literature review of recent studies on SmI(2)-H(2)O systems.
  • Analysis of mechanistic data and reaction pathways.
  • Compilation of new synthetic methodologies enabled by SmI(2)-H(2)O.

Main Results:

  • Water as an additive to SmI(2) enhances selectivity and enables new reaction pathways.
  • Mechanistic studies provide insights into the role of water in modulating SmI(2) reactivity.
  • Novel SmI(2)-H(2)O promoted transformations have been developed, expanding synthetic utility.

Conclusions:

  • SmI(2)-H(2)O systems offer unique advantages in organic synthesis due to tunable reactivity.
  • Further exploration of mechanistic aspects will likely lead to more innovative applications.
  • The use of water as an additive represents a significant development in samarium diiodide chemistry.