In 2019,Angewandte Chemie, International Edition included an article by Yi, Xiangli; Hu, Xile. Name: Ethyltriphenylphosphonium bromide. The article was titled 《Formal Aza-Wacker Cyclization by Tandem Electrochemical Oxidation and Copper Catalysis》. The information in the text is summarized as follows:
An approach to transform electrochem. generated organic radical intermediates into neutral products e.g., I by reaction with a metal catalyst was described. This approach combines electrochem. oxidation with Cu catalysis to effect formal aza-Wacker cyclization of internal alkenes e.g., crotyl N-phenylcarbamate. The Cu catalyst is essential for transforming secondary and primary alkyl radical intermediates into alkenes. A wide range of 5-membered N-heterocycles can be prepared under mild conditions. In the experiment, the researchers used many compounds, for example, Ethyltriphenylphosphonium bromide(cas: 1530-32-1Name: Ethyltriphenylphosphonium bromide)
Ethyltriphenylphosphonium bromide(cas: 1530-32-1) is a phase transfer catalyst, used to accelerate the cure of phenolic-based epoxy resins, certain fluoroelastomer resins and thermosetting powder coatings. It is also used as catalysts in the synthesis of certain organic compounds and as a pharmaceutical intermediate.Name: Ethyltriphenylphosphonium bromide
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary