Synthesis of carbazoles based on gold-copper tandem catalysis was written by Choi, Subin;Srinivasulu, Vunnam;Ha, Sujin;Park, Cheol-Min. And the article was included in Chemical Communications (Cambridge, United Kingdom) in 2017.Formula: C10H2CuF12O4 This article mentions the following:
In the presence of Au(Ph3P)Cl, AgOTf, and Cu(hfacac)2, and using MnO2 as a stoichiometric oxidant, aminophenylalkynyl diazodicarbonyl compounds (diazo anilinoalkynes) such as I underwent chemoselective tandem hydroamination, insertion, and aromatization reactions to yield hydroxycarbazoles such as II in 49-82% yields. The aminophenylalkynyl diazodicarbonyl compounds were prepared in four steps (three-step longest linear sequences) from anilines, propargyl bromides, and dicarbonyl compounds In the experiment, the researchers used many compounds, for example, copper(ii)hexafluor-2,4-pentanedionate (cas: 14781-45-4Formula: C10H2CuF12O4).
copper(ii)hexafluor-2,4-pentanedionate (cas: 14781-45-4) belongs to copper catalysts. The applications of Copper-based nanoparticles have received great attention due to low toxicity and inexpensive, earth-abundant. It is clear from the impact copper catalysis has had on organic synthesis that copper should be considered a first line catalyst for many organic reactions.Formula: C10H2CuF12O4
Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”