samarium; iodine in tetrahydrofuran T=20°C; 0.0833333 h;

SPB; acetic acid; potassium bromide T=20°C; 2 h;

1: With gallium(III) chloride; boron trichloride in methanol; dichloromethane; 1,2-dichloro-ethane T=90°C; Sugasawa reaction; 2: With water in methanol; dichloromethane; 1,2-dichloro-ethane T=80°C; 0.5 h;

(i) ZnCl2, (ii) AcOH, H2SO4; Multistep reaction;