1: acetonitrile 2: (i) nBuLi, THF, Et2O, hexane, (ii) /BRN= 1698469/ 3: Cu(OAc)2 / dimethylformamide 4: KOtBu / 2-methyl-propan-2-ol; benzene View Scheme

1: (i) NaOEt, EtOH, (ii) NBS, (PhCO)2O2, AIBN, CCl4 2: acetonitrile 3: (i) nBuLi, THF, Et2O, hexane, (ii) /BRN= 1698469/ 4: Cu(OAc)2 / dimethylformamide 5: KOtBu / 2-methyl-propan-2-ol; benzene View Scheme

potassium tert-butylate in tert-butyl alcohol; benzene

1: Cu(OAc)2 / dimethylformamide 2: KOtBu / 2-methyl-propan-2-ol; benzene View Scheme

1: (i) nBuLi, THF, Et2O, hexane, (ii) /BRN= 1698469/ 2: Cu(OAc)2 / dimethylformamide 3: KOtBu / 2-methyl-propan-2-ol; benzene View Scheme