Chemo- and Regioselectivity-Tunable Phosphination of Alkynes.

Published in: Organic letters (2022)

A divergent intramolecular phosphination of alkynes is developed. Fine tuning of chemo- and regioselectivity has been realized by just adding LiBr or H 2 O to give 5- exo -dig and 6- endo -dig phosphacycles, respectively. A plausible mechanism is proposed on the basis of the control experiments and 31 P NMR spectra analysis. The absorption and emission properties of the obtained 1-phosphaphenalenes were also studied.

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