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3 days ago · Xie et al. describe the divergent asymmetric synthesis of [5]/[6]pyridohelicenes and longer [7]/[8]heterohelicenes via sequential chiral phosphoric-acid-catalyzed Povarov reaction and subsequent aromatizations. The method offers a broad substrate scope, high efficiency, and enantioselectivity, and the heterohelicenes exhibit promising photophysical and chiroptical properties.
2 days ago · An electrochemical three-component reaction involving elemental sulfur is disclosed for achieving a metal-free, oxidant-free synthesis of thioesters in a high atom-economical, step-economical and chemoselective manner. A mechanistic investigation indicates that the use of elemental sulfur to trap acyl radical derived from radical umpolung of α-keto acid with an electrochemical design can ...
3 days ago · A synthesis reaction can be A synthesis reaction can be represented by the general equation: A + B → represented by the general equation: A + B → C C In this equation, the letters A and B In this equation, the letters A and B represent the reactants that begin the represent the reactants that begin the reaction, and the letter C represents ...
