Halide-free and metal-free allylic thiolation/selenation of P(O)H compounds with sulfur/selenium and allylic alcohols

A halide- and metal-free method for forming C–S/Se–P(O) bonds using allylic alcohols, P(O)H compounds, and elemental sulfur/selenium is reported, eliminating the need for toxic, odorous, and moisture-sensitive starting materials.