Ir-catalyzed almost perfect enantioselective synthesis of helical polyaryls based on an axially-chiral sequence

摘要

Ir-catalyzed enantioselective [2+2+2] cycloaddition of tetraynes or an octayne with monoalkynes proceeded to give helically-chiral quinquearyl and noviaryl compounds,which respectively have four and eight consecutive axial chiralities,in an almost enantiomerically pure form.