1: 72 percent / 1.) n-BuLi; 3.) H3O(+) / tetrahydrofuran / 1.) -78 deg C 2: 95 percent / Ba(OH)2 / Pd(0) 3: 70 percent / 1.) LDA; 2.) 50percent aq. HOAc / 1.) THF, reflux, 2.5 h; 2.) reflux, 10 min 4: 81 percent / Et3N / CH2Cl2 / -78 °C 5: 69 percent / LiCl, (2-furyl)3P / Pd2(dba)3 / various solvent(s) / 5 h / Ambient temperature 6: 90 percent / BCl3 / CH2Cl2 / 0.17 h / 0 °C View Scheme