Synthesis of spirobarbiturate-pyrrolidinones <i>via</i> a domino aza-Michael/S<sub>N</sub>2 cyclization of barbiturate-derived alkenes with <i>N</i>-alkoxy α-haloamides
A highly efficient domino aza-MIRC (Michael Induced RingClosure) reaction between barbiturate-derived alkenes and N-alkoxy α-haloamides has been achieved in moderate to excellent yields. This reaction proceeds smoothly under mild conditions via a domino aza-Michael addition/intramolecular SN2 sequence, providing a practical tool in the synthesis of bioactive molecules spirobarbiturate-3-pyrrolidinones
Synthesis of Seven-membered Ring Containing Difluoromethylene Unit by Sc(OTf)<sub>3</sub>-catalyzed Activation of Single C–F Bond in CF<sub>3</sub> Group
作者:Naoya Hisano、Daiki Kimura、Keiji Mori
DOI:10.1246/cl.190280
日期:2019.8.5
A Sc(OTf)3-catalyzed activation of a singleC–Fbond in a CF3 group is described. This reaction has two interesting features: (1) the synthesis of difluoromethylene compounds through Lewis acid-cat...