Sensitive and Accurate <sup>13</sup>C Kinetic Isotope Effect Measurements Enabled by Polarization Transfer
作者:Eugene E. Kwan、Yongho Park、Harrison A. Besser、Thayer L. Anderson、Eric N. Jacobsen
DOI:10.1021/jacs.6b10621
日期:2017.1.11
Polarization transfer is demonstrated as a sensitive technique for the measurement of isotopic fractionation of protonated carbons at natural abundance. This method allows kineticisotope effects (KIEs) to be determined with substantially less material or shorter acquisition time compared with traditional experiments. Computations quantitatively reproduce the KIEs in a Diels-Alder reaction and a catalytic
One-Pot Stereoselective Synthesis of 2,3-Diglycosylindoles and Tryptophan-C-glycosides via Palladium-Catalyzed C–H Glycosylation of Indole and Tryptophan
We described a novel palladium-catalyzed C–H glycosylation of indole or tryptophan for a one-pot stereoselective synthesis of 2,3-diglycosylindoles and tryptophan-C-glycosides. In this strategy, the use of air and base-free and ligand-free conditions provided a highly efficient route to construct C-glycosides. The method can be applied to a wide range of cost-effective and convenient glycosyl chloride