Bis(acetylacetonato)copper(II) is an active catalyst for the hydrophosphination of alkenes and alkynes with primary and secondary phosphines. Under thermal conditions, the activity of Cu(acac)<sub>2</sub> is comparable to some of the best literature catalysts. However, under ambient temperature irradiation centered at 365 nm, the conversions are remarkable with some reactions complete in minutes. The photocatalytic conditions are critical, and comparison to literature catalysts has been made where Cu(acac)<sub>2</sub> is still superior in activity. Initial mechanistic work, which at time of writing does not support a radical mechanism, will be presented. Nevertheless, this simple, inexpensive catalyst is highly effective, placing hydrophosphination in the hands of many more synthetic chemists.

Bench-stable copper catalyst for fast hydrophosphination

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

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