1: 1.) LDA / 1.) dimethoxyethane, -40 deg C, 2.) dimethoxyethane, 50 deg C, 30 min 2: 1.) LDA, 2.) phenylselenyl chloride, 3.) pyridine, 30percent H2O2 3: 90 percent / NH3, Li / tetrahydrofuran / 1 h / -33 °C 4: 95 percent / L-Selectride / tetrahydrofuran / 2.5 h / -78 - 0 °C 5: 1.) BH3, 2.) 30percent aq. H2O2, aq. NaOH / 1.) THF, 0 deg C to RT, 1.5 h, 2.) THF, water, overnight 6: 48 percent / p-toluenesulfonic acid / toluene / 2 h / 80 °C View Scheme