An efficient, asymmetric solid-phase synthesis of benzothiadiazine-substituted tetramic acids: Potent inhibitors of the hepatitis C virus RNA-dependent RNA polymerase
作者:Karen A. Evans、Deping Chai、Todd L. Graybill、George Burton、Robert T. Sarisky、Juili Lin-Goerke、Victor K. Johnston、Ralph A. Rivero
DOI:10.1016/j.bmcl.2006.01.034
日期:2006.4
An efficient, asymmetric solid-phase synthesis of benzothiadiazine-substituted tetramic acids is reported. Starting from commercially available chiral Fmoc-protected alpha-amino acids loaded onto Wang resin, Fmoc removal, reductive amination followed by amide bond formation, and base-catalyzed cyclization with simultaneous cleavage from the resin provided the desired products. Compounds described are
A Highly Efficient, Asymmetric Synthesis of Benzothiadiazine-Substituted Tetramic Acids: Potent Inhibitors of Hepatitis C Virus RNA-Dependent RNA Polymerase
作者:Duke M. Fitch、Karen A. Evans、Deping Chai、Kevin J. Duffy
DOI:10.1021/ol052371w
日期:2005.11.1
[reaction: see text] An efficient two-pot, asymmetricsynthesis of benzothiadiazine-substituted tetramic acids is reported. Starting from commercially available alpha-amino acids or esters, reductive amination followed by a novel one-pot amide bond formation/Dieckmann cyclization provided the desired products in high yield and opticalpurity. An analogous solid-phase approach to the same targets is