1: 44 percent / (dimethylamino)sulfur trifluoride / CH2Cl2 / 5 h / -78 - 20 °C 2: 46 percent / 1,2-bis(trimethylsilyl)benzene; 4,4'-di-tert-butylbiphenyl; lithium / tetrahydrofuran / 2.5 h / 0 °C View Scheme