2 research outputs found
Enantioselective Synthesis of Polycyclic Nitrogen Heterocycles by Rh-Catalyzed Alkene Hydroacylation: Constructing Six-Membered Rings in the Absence of Chelation Assistance
Catalytic,
enantioselective hydroacylations of <i>N</i>-allylindole-2-carboxaldehydes
and <i>N</i>-allylpyrrole-2-carboxaldehydes
are reported. In contrast to many alkene hydroacylations that form
six-membered rings, these annulative processes occur in the absence
of ancillary functionality to stabilize the acylrhodium(III) hydride
intermediate. The intramolecular hydroacylation reactions generate
7,8-dihydropyrido[1,2-<i>a</i>]indol-9(6<i>H</i>)ones and 6,7-dihydroindolizin-8(5<i>H</i>)-ones in moderate to high yields with excellent enantioselectivities