Reactions of allyl alcohols and boronic acids with trifluoromethanesulfonyl hypervalent iodonium ylide under copper-catalysis
作者:Sadayuki Arimori、Masahiro Takada、Norio Shibata
DOI:10.1039/c5dt02214b
日期:——
trifluoromethylthio groups are both important substituents for pharmaceuticals, agrochemicals and functional materials. We herein report the trifluoromethylthiolation of allyl alcohols 2 with trifluoromethanesulfonyl hypervalent iodonium ylide 1 under copper catalysis to provide trifluoromethylsulfinyl compounds 3. Trifluoromethylthiolation of boronic acids 4 with 1 furnished trifluoromethylthio compounds
Fluorinated functionality: The copper‐catalyzed oxidative trifluoromethylthiolation of aryl boronicacids with TMSCF3 and elemental sulfur at room temperature is described for the first time. This reaction provides a concise and efficient method for the synthesis of aryl trifluoromethyl thioethers (ArSCF3) under mild conditions. Phen=Phenanthroline.
No heat: The direct introduction of the trifluoromethylthio (SCF3) group into drug candidates has received significant attention. Herein, we report an alkali- and heat-free method for the trifluoromethylthiolation of aryl boronic acid substrates using a sulfonyl trifluoromethylthiolating reagent in the water phase. This method shows good tolerance towards various functional groups with satisfactory yields