Heinen, Flemming; Reinhard, Dominik L.; Engelage, Elric; Huber, Stefan M. published an article in 2021. The article was titled 《A bidentate iodine(III)-based halogen-bond donor as a powerful organocatalyst》, and you may find the article in Angewandte Chemie, International Edition.Recommanded Product: 2,5-Dibromothiophene The information in the text is summarized as follows:
In contrast to iodine(I)-based halogen bond donors, iodine(III)-derived ones have only been used as Lewis acidic organocatalysts in a handful of examples, and in all cases they acted in a monodentate fashion. Herein, we report the first application of a bidentate bis(iodolium) salt as organocatalyst in a Michael and a nitro-Michael addition reaction as well as in a Diels-Alder reaction that had not been activated by noncovalent organocatalysts before. In all cases, the performance of this bidentate XB donor distinctly surpassed the one of arguably the currently strongest iodine(I)-based organocatalyst. Bidentate coordination to the substrate was corroborated by a structural anal. and by DFT calculations of the transition states. Overall, the catalytic activity of the bis(iodolium) system approaches that of strong Lewis acids like BF3. In the experiment, the researchers used many compounds, for example, 2,5-Dibromothiophene(cas: 3141-27-3Recommanded Product: 2,5-Dibromothiophene)
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Referemce:
Bromide – Wikipedia,
bromide – Wiktionary