The author of 《Rhodium-Catalyzed Reaction of Sulfoxonium Ylides and Anthranils toward Indoloindolones via a (4 + 1) Annulation》 were Wu, Xiaopeng; Xiao, Yan; Sun, Song; Yu, Jin-Tao; Cheng, Jiang. And the article was published in Organic Letters in 2019. SDS of cas: 1774-47-6 The author mentioned the following in the article:
A rhodium-catalyzed annulation between aroyl sulfoxonium ylides and anthranils has been developed to synthesize 10H-indolo[1,2-a]indol-10-one derivatives This reaction started with an unprecedented (4 + 1) annulation toward N-(2-formylphenyl) indolones, proceeding with the sequential ortho-amination of the C-H bond in aroyl sulfoxonium ylides by anthranils and the insertion of N-H to carbene. Finally, the Aldol condensation constructed the second indole ring. This procedure features the formation of two C-N bonds and one C=C bond in one pot. The results came from multiple reactions, including the reaction of Trimethylsulfoxonium iodide(cas: 1774-47-6SDS of cas: 1774-47-6)
Trimethylsulfoxonium iodide(cas: 1774-47-6) is a sulfoxonium salt. It is used to generate dimethyloxosulfonium methylide by reaction with sodium hydride. The latter compound is used as a methylene-transfer reagent, and is used to prepare epoxides.SDS of cas: 1774-47-6
Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com