A highly efficient totalsynthesis of dictyodendrins A–E was accomplished. The synthesis features a novel benzyne‐mediated one‐pot indoline formation/cross‐coupling sequence for the construction of a highly substituted key indoline intermediate. Peripheral substituents were introduced onto this intermediate in a modular fashion to complete the totalsynthesis of dictyodendrins A–E.
Synthesis of Regioselectively Functionalized Pyrenes via Transition-Metal-Catalyzed Electrocyclization
作者:Anthony Davis、D. Walker、Joshua Howgego
DOI:10.1055/s-0030-1258238
日期:2010.11
rearrangement of 2,6-diethynyl-1,1′-biphenyl precursors to form polysubstituted pyrenes is described. This method is useful for the preparation of pyrenes with uncommon substitution patterns, and selective integration of functional groups at the 1-, 2-, 3-, 5-, 7- and 9-positions is demonstrated. pyrene - electrocyclic reactions - arenes - rearrangements - alkynes
Formal Synthesis of Hepatitis C Virus NS5B Polymerase Inhibitor
作者:Hidetoshi Tokuyama、Takahiro Noro、Kentaro Okano
DOI:10.1055/s-0033-1339522
日期:——
A formal synthesis of a hepatitis C virus (HCV) inhibitor is described. The synthesis features a benzyne-mediated one-pot indoline formation-methylation sequence and an In(OTf)(3)-mediated mild oxa-Pictet-Spengler reaction for the synthesis of substituted electron-rich pyranoindole.