1.1: iodine; magnesium / diethyl ether / Inert atmosphere; Reflux 1.2: 0 °C / Inert atmosphere 2.1: PDC / dichloromethane / 20 °C 3.1: titanium nanoparticles / tetrahydrofuran / 6 h / 66 °C / Inert atmosphere View Scheme

1: tetrahydrofuran 2: (i) THF, (ii) P2I4, Py, CS2 View Scheme

(i) THF, (ii) P2I4, Py, CS2; Multistep reaction;

in cyclohexane T=150°C;