triphenylmethane tetrafluoroborate in 1,2-dichloro-ethane 3 h; RefluxInert atmosphere;

iodine in cyclohexane 2.5 h; Irradiation;

iodine Irradiation;

1: (hydrolysis) 2: polyphosphoric acid / 140 °C 3: (i) NaBH4, NaOH, MeOH, (ii) (heating), I2 View Scheme

1: n-butyllithium; N,N,N',N,-tetramethylethylenediamine / tetrahydrofuran; hexane / 20 °C / Inert atmosphere 2: tetrahydrofuran; hexane / 2 h / -78 - 20 °C / Inert atmosphere 3: FSO3H*SbF5 / hexafluoroisopropyl alcohol / 2 h / 0 - 20 °C / Inert atmosphere; Large scale reaction 4: triphenylmethane tetrafluoroborate / 1,2-dichloro-ethane / 3 h / Reflux; Inert atmosphere View Scheme

Multistep reaction;

T=250 - 260°C;