1: 37 percent / triflic acid / CH2Cl2; tetrahydrofuran / 0.83 h / Ambient temperature 2: 72 percent / 0.1 N NaOEt / 2 h / Ambient temperature 3: 1.) pyridine, DMF, copper powder, 4-dimethylaminopyridine / 1.) < -70 to 115 deg C; sealed tube, 2.) 8 h, 60 deg C; sealed tube was opened View Scheme