1: TFA, anisole 2: 81 percent / Et3N, N-methylmorpholine / dimethylformamide 3: TFA, anisole 4: 84 percent / Et3N, N-methylmorpholine / dimethylformamide 5: TFA, anisole 6: 92 percent / Et3N, N-methylmorpholine / dimethylformamide 7: TFA, anisole 8: 65 percent / Et3N, N-methylmorpholine / dimethylformamide 9: 92 percent / DMF/SO3, pyridine, ethane-1,2-dithiol, DMF / 1 h / 20 °C 10: 49 percent / trifluoromethanesulfonic acid, thioanisole, TFA, ethane-1,2-dithiol, m-cresol / 1.5 h / 0 °C View Scheme