Palladium Catalyzed Cyclizations of Oxime Esters with 1,2-Disubstituted Alkenes: Synthesis of Dihydropyrroles
摘要:
Pd-catalyzed cyclizations of oxime esters with 1,2-dialkylated alkenes provide an entry to chiral dihydropyrroles. Substrate and catalyst controlled strategies for selective product formation (vs alternative pyrroles) are outlined.
Radical Aza-Cyclization of α-Imino-oxy Acids for Synthesis of Alkene-Containing <i>N</i>-Heterocycles via Dual Cobaloxime and Photoredox Catalysis
作者:Jia-Lin Tu、Jia-Li Liu、Wan Tang、Ma Su、Feng Liu
DOI:10.1021/acs.orglett.0c00224
日期:2020.2.7
Nitrogen-containing heterocycles are prevalent in both naturally and synthetically bioactive molecules. We report herein an unprecedented protocol for radical aza-cyclization of α-imino-oxy acids with pendant alkenes via synergistic photoredox and cobaloxime catalysis. With or without alkenes as the intermolecular cross-coupling partners, the transformation provides a variety of corresponding alkene-containing dihydropyrrole