Trichloromethylthiolation of N-Heterocycles: Practical and Completely Regioselective

Metal-free oxidative trifluoromethylation of indoles with CF3SO2Na on the C2 position

An efficient method of synthesizing 2-trifluoromethylindoles from indoles with easy-to-handle, cheap and low-toxic CF₃SO₂Na under metal-free conditions is described, which selectively introduces trifluoromethyl to indoles on the C2 position. The desired product can be obtained in 0.7 g yield. A radical intermediate may be involved in this transformation.

An efficient method of synthesizing 2-trifluoromethylindoles from indoles with easy-to-handle, cheap and low-toxic CF₃SO₂Na under metal-free conditions is described, which selectively introduces trifluoromethyl to indoles on the C2 position.

N-Hydroxy sulfonamides as new sulfenylating agents for the functionalization of aromatic compounds

An unprecedented use of N-hydroxy sulfonamides as sulfenylating agents has been established. In the presence of catalytic amounts of iodine and N-hydroxysuccinimide, N-hydroxy sulfonamides participated in sulfenylation with indoles, 7-azaindole, N-methyl pyrrole, and 2-naphthol to afford structurally diverse thioethers in moderate to excellent yields with very high regioselectivity.