1: With Rh(dppp)SbF6 in 1,2-dichloro-ethane T=85°C; 24 h; Inert atmosphere; 2: With 1,8-diazabicyclo[5.4.0]undec-7-ene in 1,2-dichloro-ethane T=20°C; 1 h; Inert atmosphere;