5.17 Reduction: Pinacol Coupling

J. Inanaga, H. Furuno

    Research output: Chapter in Book/Report/Conference proceedingChapter

    5 Citations (Scopus)


    The pinacol coupling reaction, a reductive coupling reaction of carbonyl compounds that proceeds through the formation of ketyl radical intermediates, affords the corresponding 1,2-diols in one step. Chirality of the vicinal stereogenic centers that are formed can be induced or controlled by (1) chiral substrates with center-, axial-, or planar-chiralities or substrates modified by chiral auxiliaries, (2) chiral reducing agents such as low-valent metal complexes with chiral modifiers, or (3) chiral catalysts like transition metal complexes bearing chiral ligands, the low-valent species of which can be recycled in the presence of the appropriate coreductants. Thus, a variety of chiral and nonracemic (i.e., optically active) 1,2-diols were produced through the highly stereoselective pinacol coupling reactions performed either in an inter- or intramolecular way. The reductive homocoupling of imines (imino-pinacol coupling) and the carbonyl-imine heteropinacol coupling also proceeded to give the corresponding 1,2-diamines and 1,2-aminoalcohols, respectively, in high stereoselectivities under certain conditions. Some applications to the synthesis of biologically interesting organic molecules are also presented.

    Original languageEnglish
    Title of host publicationSynthetic Methods IV - Asymmetric Oxidation Reduction, C-N
    PublisherElsevier Ltd
    Number of pages22
    ISBN (Print)9780080951683
    Publication statusPublished - Sept 2012

    All Science Journal Classification (ASJC) codes

    • General Chemistry


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