Two-Fold Intramolecular Phosphacyclization: From Fluorescent Diphosphapyrene Salts to Pentavalent Derivatives was written by Hindenberg, Philip;Belyaev, Andrey;Rominger, Frank;Koshevoy, Igor O.;Romero-Nieto, Carlos. And the article was included in Organic Letters in 2022.Name: Copper(II) trifluoromethanesulfonate This article mentions the following:
The synthesis of π-extended pyrene-based luminescent compounds containing two six-membered phosphacycles was realized through a two-step synthesis. It involves a Cu(II)-mediated double cyclization of tertiary diphosphine derivatives to afford dicationic mols. with quaternized P centers. Subsequent transformation of diphosphonium species into the corresponding P-oxide derivatives was successfully achieved through Pd(0)-assisted cleavage of the P-Ph bonds, which opens a promising way for the functionalization of polyaromatic P-systems. In the experiment, the researchers used many compounds, for example, Copper(II) trifluoromethanesulfonate (cas: 34946-82-2Name: Copper(II) trifluoromethanesulfonate).
Copper(II) trifluoromethanesulfonate (cas: 34946-82-2) belongs to copper catalysts. The applications of Copper-based nanoparticles have received great attention due to the earth-abundant, inexpensive and low toxicity. 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.Name: Copper(II) trifluoromethanesulfonate
Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”