Towards Simplifying the Chemistry of<i>N</i>-Acyliminium Ions: A One-Pot Protocol for the Preparation of 5-Acetoxy Pyrrolidin-2-ones and 2-Acetoxy<i>N</i>-Alkoxycarbonyl Pyrrolidines from Imides
作者:Vincent Dalla、Fridrich Szemes Jr.、Anthony Fousse、Raja Ben Othman、Till Bousquet、Mohamed Othman
DOI:10.1055/s-2006-926318
日期:——
A new one-step protocol for the synthesis of acetoxy lactams starting from imides has been developed. This method involves regiospecific reduction of the imide with LiEt 3 BH, then capture of the transient lithium alkoxide by acetic anhydride.
作者:Mathéo Berthet、Alice Beauseigneur、Charlotte Moine、Catherine Taillier、Mohamed Othman、Vincent Dalla
DOI:10.1002/chem.201705949
日期:2018.1.26
through an unprecedented double Mukaiyama–Mannich–Prins cascade transformation. This novel cascade annulation process demonstrates a promising scope, and takes place mostly catalytically with interesting stereocontrol. Furthermore, an appealing facet of this chemistry is emphasized with a bicatalytic approach by which the Mannich–Prins cascade follows a Ru‐catalyzed N‐allylamide to N‐(E)‐propenyl isomerization
This work describes the first iridium-catalyzed isomerization of N-allylamides into enamides. This strategy allows the chemoselective preparation of (E)-N-(1-propenyl)-enamides and can be applied for the selective deprotection of N-allylamides. (C) 2004 Elsevier Ltd. All rights reserved.