An eco-friendly and efficient photoinduced coupling of alkenes and alkynes with H-phosphinates and other P(O)H derivatives under free-radical conditions

An efficient method for the synthesis of organophosphorus compounds from alkenes or alkynes and P(O)H compounds was developed under neutral and free-radical conditions. This methodology can be achieved without solvent, at room temperature in an open air system, using only 0.1 equiv. of 2,2-dimethoxy-2-phenylacetophenone (DPAP) as photoinitiator and an equimolar ratio of unsaturated compound and P(O)H derivative. Additionally, the reaction can also proceed under sunlight irradiation, giving to this methodology a very respectful approach to the environment.

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