triethyloxonium tetra-fluoroborate

1: 77 percent / methanol / 8h reflux, 14h at 60 degC 2: 85 percent / sodium hydride / dimethylformamide 3: 76 percent / LiAlH4 4: 93 percent 5: 76 percent / Li / liquid ammonia View Scheme

1: 77 percent / methanol / 8h reflux, 14h at 60 degC 2: 85 percent / sodium hydride / dimethylformamide 3: 76 percent / LiAlH4 4: 93 percent 5: 76 percent / Li / liquid ammonia 7: 1.) LDA, phenylselenyl bromide; 2.) 30percent H2O2 / 2.) CH2Cl2/pyridine, O degC to RT 8: 44 percent / DiBAH / toluene / 4 h / -78 °C View Scheme