Interception of enamine intermediates in reductive functionalization of lactams by sodium hydride: Synthesis of 2-cyano-3-iodo piperidines and pyrrolidines
作者:Jiahua Chen、Jun Wei Lim、Shunsuke Chiba
DOI:10.1016/j.tet.2022.132779
日期:2022.5
Facile conversion of 2-piperidones and 2-pyrrolidones into 2-cyano-3-iodo piperidines or pyrrolidines has been accomplished by the sequence of 1) controlled hydride reduction of lactams using sodium hydride (NaH) in the presence of sodium iodide (NaI); 2) silylation of anionic hemiaminal intermediates to facilitate deoxygenation to form an equilibrium mixture of iminium cations and enamines-silanol
Iridium‐Catalyzed Reductive (3+2) Annulation of Lactams Enabling the Rapid Total Synthesis of (±)‐Eburnamonine
作者:Yasukazu Sugiyama、Kento Yamada、Daiki Kaneko、Yuya Kusagawa、Toshitaka Okamura、Takaaki Sato
DOI:10.1002/anie.202317290
日期:2024.2.5
of iridium-catalyzed hydrosilylation of the lactam carbonyl group followed by iridium-catalyzed photoredox coupling with α-bromoacetic acid. The method was successfully applied to the four-step totalsynthesis of (±)-eburnamonine.