Reaction of a sterically crowded triarylphosphine with iodine in the presence of oxygen

GRAPHICAL ABSTRACT

ABSTRACT

Reaction of tris(2,4,6-triisopropylphenyl)phosphine with iodine in air afforded a phosphonium triiodide resulting from the oxidation to the radical cation followed by the reaction with a molecular oxygen and the cyclization with the ortho-isopropyl group.

KEYWORDS:

• Phosphine
• oxidation
• iodine
• radical cation
• phosphonium salt

Acknowledgment

The author thanks the Research and Analytical Center for Giant Molecules, Graduate School of Science, Tohoku University, for measuring a mass spectrum and performing elemental analysis.

Funding

This work was supported by JSPS KAKENHI (Grant numbers 22605001, 25600020).