Herein we describe the dearomatization of aryl iodanes through an unprecedented "rearrangement/addition" sequence. The process consists of two stages. First, a rapid [3,3] sigmatropic rearrangement of the aryl iodane with an α-stannyl nitrile affords a highly electrophilic dearomatized intermediate at -78 °C. A low-temperature rearrangement then enables the unstable dearomatized species to be trapped
Two-step continuous-flow synthesis of 6-membered cyclic iodonium salts via anodic oxidation
作者:Julian Spils、Thomas Wirth、Boris J Nachtsheim
DOI:10.3762/bjoc.19.2
日期:——
to existing batch methods. Benzyl acetates are submitted to this two-step procedure as highly available and cheap starting materials. An acid-catalyzed Friedel–Crafts alkylation followed by an anodicoxidative cyclization yielded a defined set of cyclic iodonium salts in a highly substrate-dependent yield.