A convenient method for preparing diverse o-iodoaryl triflates by the desilyliodination of o-silylaryl triflates has been developed. The treatment of o-silylaryl triflates with 1,3-diiodo-5,5-dimethylhydantoin (DIH) in the presence of aluminum trichloride efficiently afforded the corresponding o-iodoaryl triflates, including those with multiple 1-iodo-2-(triflyloxy)arene moieties. Various multisubstituted o-iodoaryl triflates were easily prepared by the iridium-catalyzed C–H borylation of readily available, simple o-silylaryl triflates, followed by deborylative transformations and subsequent desilyliodinaton.
Exploiting amphiphilicity: facile metal free access to thianthrenes and related sulphur heterocycles
作者:Martin Pawliczek、Lennart K. B. Garve、Daniel B. Werz
DOI:10.1039/c5cc01757b
日期:——
Readily available benzodithioloimines are reacted with arynes or alkynes substituted with electron-withdrawing groups to afford the corresponding thianthrene or benzo[b][1,4]dithiine derivatives. The transformation takes place under mild reaction conditions without...