1: m-chloroperbenzoic acid / CHCl3 / 6 h / 30 °C 2: 2.73 g / hydrochloric acid aq / methanol / 1 h / 20 °C 3: 100 percent / 2,6-lutidine / CH2Cl2 / 1 h / -30 °C 4: 80 percent / 1,8-diazabicyclo[5.4.0]undec-7-ene; lithium chloride; bis(triphenylphosphine)palladium(II) chloride / dimethylformamide / 145 °C View Scheme

tert.-butylhydroperoxide; tetrabutylammomium bromide in water T=120°C; 24 h; Schlenk techniqueSealed tube;