N–Si Heterolysis by Chiral (BOX)Cu(OTf)2 Catalysts for the Synthesis of Indole and Carbazole Glycosides
作者:Neyen Romano、Tanner L. McMinn、Michel R. Gagné
DOI:10.1021/acs.orglett.4c01584
日期:2024.6.14
been shown to catalyze the coupling of acetyl-protected carbohydrates with N-silylated indoles to give the corresponding N-glycosides. Preliminary mechanistic experiments indicated that catalysis occurs through formation of a Cu–indolide complex with concomitant formation of TMS-OTf which together activate the sugar and deliver the indole nucleophile.
Rapid trifluoromethylation of indole derivatives was achieved using trimethylsilyltriflate as the catalyst. Good to high yields were observed within only 5 min at room temperature. This reaction system is able to provide not only the mono-trifluoromethylated products, but also the di-trifluoromethylated derivatives, because of its high reaction efficiency.