1: thionylchloride / pyridine / 4 h / 10 °C 2: 85 percent / xanthone / cyclohexane; benzene / 4 h / Irradiation 3: 108 mg / 10percent Pd-C / bis-(2-methoxy-ethyl) ether View Scheme

With  thionyl chloride in  pyridine T=10°C; 4 h;