1.1: 92 percent / LHMDS / tetrahydrofuran / 0.83 h / 0 °C 2.1: 95 percent / Li / tetrahydrofuran; ethanol; liquid ammonia / 0.5 h / -78 °C 3.1: 86 percent / Et3N; DMAP / CH2Cl2 / 1.5 h / 20 °C 4.1: 98 percent / NaI / butan-2-one / 1.5 h / Heating 5.1: 75 percent / urea; NaNO2 / dimethylsulfoxide / 15 h / 20 °C 6.1: 95 percent / imidazole / dimethylformamide / 5 h / 20 °C 7.1: 85 percent / p-chlorophenyl isocyanate; Et3N / benzene / 10 h / Heating 8.1: Mo(CO)6 / H2O; acetonitrile / 1.5 h / Heating 9.1: 35 mg / MsCl; Et3N / CH2Cl2 / 2 h / 20 °C 10.1: 97 percent / PPTS / ethanol / 10 h / 50 °C 11.1: LiOH / H2O; tetrahydrofuran / 0.33 h / 5 °C 12.1: Et3N; 2,4,6-trichlorobenzoyl chloride / tetrahydrofuran / 3 h / 20 °C 12.2: 5.5 mg / DMAP / toluene / 14 h / Heating 13.1: 85 percent / NaBH4 / methanol / 0.5 h / -78 °C 14.1: 95 percent / BF3*Et2O; thiophenol / CH2Cl2 / 0.5 h / 20 °C View Scheme