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Fukuyama reduction

Chemical reaction From Wikipedia, the free encyclopedia

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The Fukuyama reduction is an organic reaction and an organic reduction in which a thioester is reduced to an aldehyde by a silyl hydride in presence of a catalytic amount of palladium. This reaction was invented in 1990 by Tohru Fukuyama.[1] In the original scope of the reaction the silyl hydride was triethylsilane and the catalyst palladium on carbon:

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Fukuyama reductions are used for the conversion of carboxylic acids (as thioester precursor) to aldehydes which is considered a difficult procedure because of the ease of secondary reduction to an alcohol.

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Reaction mechanism

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The basic reaction mechanism for this reaction takes place as a catalytic cycle:

  • Oxidative addition:
  • Transmetallation:
  • Reductive elimination:
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Scope

In a variation of the Fukuyama reduction the core BODIPY molecule has been synthesized from the SMe-substituted derivative:[2] Additional reagents are copper(I)-thiophene-2-carboxylate (CuTC), Pd(dba)2 and tri(2-furyl)phosphine

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In the related Fukuyama coupling the hydride is replaced by a carbon nucleophile.

References

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