iodine in benzene T=80°C; 42 h;

1: 72 percent / SOCl2 / pyridine; diethyl ether / 0 °C 2: 80 percent / Rh2(OAc)4 / CH2Cl2 / 0.17 h / 0 °C 3: CHCl3 / 24 h / Ambient temperature View Scheme

1: 80 percent / Rh2(OAc)4 / CH2Cl2 / 0.17 h / 0 °C 2: CHCl3 / 24 h / Ambient temperature View Scheme

1: 8.3 g / diethyl ether / 12 h / Ambient temperature 2: 86 percent / rhodium (II) acetate / CH2Cl2 / 0.5 h / 25 °C / other α-diazoketone derived from furanyl propionic acid 3: 100 percent / iodine / benzene / 42 h / 80 °C View Scheme