β-Selective C–H Arylation of Pyrroles Leading to Concise Syntheses of Lamellarins C and I
作者:Kirika Ueda、Kazuma Amaike、Richard M. Maceiczyk、Kenichiro Itami、Junichiro Yamaguchi
DOI:10.1021/ja508449y
日期:2014.9.24
The first generalβ-selectiveC-Harylation of pyrroles has been developed by using a rhodium catalyst. This C-Harylation reaction, which is retrosynthetically straightforward but results in unusual regioselectivity, could result in de novo syntheses of pyrrole-derived natural products and pharmaceuticals. As such, we have successfully synthesized polycyclic marine pyrrole alkaloids, lamellarins C
Metal-Free Photocatalyzed Cross Coupling of Bromoheteroarenes with Pyrroles
作者:Leyre Marzo、Indrajit Ghosh、Francisco Esteban、Burkhard König
DOI:10.1021/acscatal.6b01452
日期:2016.10.7
successively trapped by pyrroles for the synthesis of heteroaromatic biaryls in moderate to excellent yields. The synthetically important photoredox catalytic C–H heteroarylation reaction works for a broad range of brominated electron-rich heteroarenes and chlorinated heteroarenes bearing electron withdrawing groups. In addition, this methodology was applied to the formal synthesis of a benzimidazole derivative