Multistep reaction;

(i) Li, Et2O, (ii) Cu2I2, (iii) /BRN= 878250/; Multistep reaction;

(i) Li, Et2O, (ii) /BRN= 2083336/; Multistep reaction;

1: 1.) Mg, 1,2-dibromoethane / 1.) THF, reflux, 3.5 h; 2.) THF, 1 h, RT 2: 87 percent / 4-dimethylaminopyridine / pyridine / 1 h / Ambient temperature 4: 82 percent / NaIO4 / tetrahydrofuran / 1 h / Ambient temperature View Scheme

(i) Li, Et2O, (ii) Cu(P(OMe)3)I, (iii) /BRN= 773866/; Multistep reaction;