This Hot Article from the University of Western Ontario by Laura C. Pavelka and Kim M. Baines details some interesting cycloaddition reactions of phosphaalkenes with alkynes.
Reactions of this type have not been well studied and typically require electron rich alkynes and quite specialised phosphoalkenes for the reaction to proceed. Here the authors have developed a much simpler approach to the syntheses using readily available reagents and a more direct route, allowing them to produce a variety of 1,2-dihydrophosphinines in good yields.
To find out how, you can download their article which is free to access for the next 4 weeks
Facile synthesis of luminescent benzo-1,2-dihydrophosphinines from a phosphaalkene
Laura C. Pavelka and Kim M. Baines
Dalton Trans., 2012, Advance Article
DOI: 10.1039/C2DT11690A
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