作者:Leo A. Paquette、Gregory J. Wells、Keith A. Horn、Tu-Hsin Yan
DOI:10.1016/s0040-4020(01)88590-2
日期:1983.1
does add satisfactorily to carbonyl compounds and the subsequent Simmons-Smith cyclopropanation provides the desired cyclopropyl carbinols, shorter routes involving the 1-trimethylsilylcyclopropyl anion were sought. The sequence based upon reductive lithiation of 1-(trimethylsilyl)-1-phenyl-thiocyclopropane proved less than satisfactory. In contrast, metalation of 1-bromo-1-(trimethylsilyl)cyclopropane
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