The condensation is sometimes called the Buckler–Epstein reaction. Many diketones can be employed in place of acetylacetone. The P-H bond can be further derivatized, leading to a range of tertiary phosphines of potential value in homogeneous catalysis.
References
^Paul G. Pringle, Martin B. Smith "Phosphatrioxa-adamantane Ligands" in Phosphorus(III) Ligands in Homogeneous Catalysis: Design and Synthesis, Edited by Paul C. J. Kamer and Piet W. N. M. van Leeuwen, 2012 John Wiley, New York. doi:10.1002/9781118299715.ch13