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Showing 1–7 of 7 results
Advanced filters: Author: Christof Sparr Clear advanced filters

  • skew-Tetramantane—diamond’s chiral core—previously only accessible from fossil fuels after elaborate separations, was selectively synthesized by a combination of visible-light photocatalytic reactions to modulate radical chemistry and catalyst-controlled C–H insertions. Operating under kinetic control, this stereoselective adamantalogous cage-extension strategy provides access to synthetic diamondoids beyond adamantane, diamantane and triamantane.

    • Xiao-Yu Li
    • Christof Sparr
    ResearchOpen Access
    Nature Chemistry
    Volume: 18, P: 597-602

  • Pentavalent stereocentres encode an expanded stereochemical space, but their catalytic tractability remained unprecedented. In this report, the authors report that catalyst control over pentavalent stereocentres is feasible.

    • Anton Budeev
    • Jianyang Dong
    • Christof Sparr
    ResearchOpen Access
    Nature Communications
    Volume: 14, P: 1-6

  • Aromatic ring-opening metathesis using Schrock–Hoveyda molybdenum catalysts enables the efficient cleavage of stable aromatic compounds such as tetraphene and naphthalene, offering controlled transformations without reagents or photoexcitation and overcoming previous challenges in aromatic bond cleavage.

    • Valeriia Hutskalova
    • Christof Sparr
    ResearchOpen Access
    Nature
    Volume: 638, P: 697-703

  • Stereodivergent catalysis was previously limited to two possible states per stereogenic element. Now, it is demonstrated that stereoselective catalysis is capable of governing higher-order stereogenicity and the catalyst-controlled synthesis of four of the six possible stereoisomers arising from a single stereogenic unit is showcased.

    • Xingxing Wu
    • Reto M. Witzig
    • Christof Sparr
    Research
    Nature Catalysis
    Volume: 4, P: 457-462

  • Enantioselective synthesis of atropisomeric biaryls is highly desirable due to the utility of these compounds as ligands and catalysts. Now, an organocatalytic polyketide cyclization is shown to convert poly-β-carbonyl compounds into binaphthalene derivatives in good enantioselectivities.

    • Reto M. Witzig
    • Vincent C. Fäseke
    • Christof Sparr
    Research
    Nature Catalysis
    Volume: 2, P: 925-930

  • The catalyst-controlled stereoselective synthesis of atropisomers is feasible by four main concepts: desymmetrization, (dynamic) kinetic resolution, direct formation of the stereogenic axis and de novo ring construction. In this Review, pioneering work in atroposelective catalysis is discussed alongside recent advances.

    • Tanno A. Schmidt
    • Valeriia Hutskalova
    • Christof Sparr
    Reviews
    Nature Reviews Chemistry
    Volume: 8, P: 497-517