Visible-light-induced cascade radical ring-closure and pyridylation for the synthesis of tetrahydrofurans
作者:Yechan Kim、Kangjae Lee、Gangadhar Rao Mathi、Inwon Kim、Sungwoo Hong
DOI:10.1039/c9gc00414a
日期:——
Reported is a novel visible-light-enabled alkoxy radical ring-closure and pyridylation from N-alkenyloxypyridinium salts serving as both alkoxy radical precursors and heteroaryl sources. This strategy features a photoredox tandem radical process involving a sequential fragmentation of an N-alkoxypyridinium salt, a radical cyclization process, and a pyridylation process. This method exhibited broad
作者:Danny E. Mancheno、Aaron R. Thornton、Armin H. Stoll、Aidi Kong、Simon B. Blakey
DOI:10.1021/ol101702w
日期:2010.9.17
A new catalyst system for intramolecular olefin aminoacetoxylation is described. In contrast to previously reported palladium- and copper-catalyzed systems, the conditions outlined in this communication favor piperdine formation with terminal olefin substrates and induce cyclization with traditionally less reactive disubstituted olefins.