A General Iridium-Catalyzed Reductive Dienamine Synthesis Allows a Five-Step Synthesis of Catharanthine via the Elusive Dehydrosecodine
作者:Pablo Gabriel、Yaseen A. Almehmadi、Zeng Rong Wong、Darren J. Dixon
DOI:10.1021/jacs.1c04980
日期:2021.7.28
A new reductive strategy for the stereo- and regioselectivesynthesis of functionalized isoquinuclidines has been developed. Pivoting on the chemoselective iridium(I)-catalyzed reductive activation of β,γ-unsaturated δ-lactams, the efficiently produced reactive dienamine intermediates readily undergo [4 + 2] cycloaddition reactions with a wide range of dienophiles, resulting in the formation of bridged