Microwave-assisted catalyst-free addition of secondary phosphines to fullerene C60

Secondary phosphines, R₂PH (R = Ph, PhCH₂CH₂), react with fullerene C₆₀ under microwave irradiation at 200–270°C for 1–2 h in the medium of substituted naphthalenes (1-Cl, 1-Me, 1-MeO) or without solvent to afford mono-adducts, HC₆₀PR₂, whose air oxidation gives the corresponding phosphine oxides, HC₆₀P(O)R₂, in up to 88% yield.