Nickel or iron salts catalyzing the selective synthesis of 3,3‐indolyl disulfide (diselenide) and 3,3‐indolyl thioether (selenide) directly from indole through C−H activation are reported. The effect of iodine element was beneficial in the novel metal‐catalyzed circulation system. A wide variety of functional groups could be tolerated under the reaction conditions.
Synthesis and antioxidant activity of new C-3 sulfenyl indoles
作者:Claudio C. Silveira、Samuel R. Mendes、Josemar R. Soares、Francine N. Victoria、Débora M. Martinez、Lucielli Savegnago
DOI:10.1016/j.tetlet.2013.07.004
日期:2013.9
A convenient and efficient methodology for the synthesis of new C-3 sulfur-substituted indoles under CeCl3·7H2O promotion is reported. Modelbis(indol-3-yl)sulfide 4a and bis(indol-3-yl)sulfone 5a proved to display potent antioxidant activity at the low micromolar level, in DPPH, ABTS, and FRAP assays, as well as in the inhibition of the peroxidation of linoleic acid.
XtalFluor‐E Enabled Regioselective Synthesis of Di‐Indole Sulfides by C3−H Sulfenylation of Indoles
作者:Nojus Cironis、Kang Yuan、Stephen P. Thomas、Michael J. Ingleson
DOI:10.1002/ejoc.202101394
日期:2022.3.15
Xtalfluor-E reacts with amine bases to form Lewisadducts which when combined with indoles afforded a simple and regioselective synthesis of di-indole sulfides as well as di-indole diethyl amino sulfonium by electrophilic aromatic substitution (SEAr).