Huang, Jie; Chen, Ling-Ling; Chen, Zhi-Min published an article in 2022. The article was titled 《Palladium-Catalyzed Three-Component Cross-Coupling of Conjugated Dienes with Indoles Using Ethynylbenziodazolones as Electrophilic Alkynylating Reagents》, and you may find the article in Organic Letters.Synthetic Route of Br3In The information in the text is summarized as follows:
A palladium-catalyzed regioselective 1,2-alkynyl-carbonalization of conjugated dienes with ethynylbenziodazolones (EBZ) and indoles was developed for the first time. Various mols. containing alkenyl, alkynyl and indole groups were readily obtained. Moreover, the resulting products can be applied to various derivatizations. This protocol used EBZ as an electrophilic alkynylating reagent, avoiding the byproduct of dimerization of alkynes. In the experimental materials used by the author, we found Indium(III) bromide(cas: 13465-09-3Synthetic Route of Br3In)
Indium(III) bromide(cas: 13465-09-3) is used as a catalyst to produce dithioacetals when unactivated alkynes react with thiols and fields such as optics and microelectronics that utilize semiconductor technology have wide uses for indium in high-performing solar cells.Synthetic Route of Br3In
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary