2: 50 percent / xylene / 69 h / 195 °C 3: diisobutyl-aluminumhydride / hexane; 1,2-dimethoxy-ethane / -78 °C 4: n-Butyllithium / tetrahydrofuran / 5 h 5: 80 percent / 1,2-dimethoxy-ethane / 4 h / 170 °C 6: 45 percent / n-Butyllithium / tetrahydrofuran 7: 0.481 g / chloroamine, aq. sodium hydroxide / diethyl ether / 1.33 h / 10 °C 8: 0.265 g / NaOCH3 / methanol / -90 - -85 °C / Irradiation 9: 96 percent / LiAlH4 / diethyl ether / 1.5 h / Ambient temperature View Scheme

2: 50 percent / xylene / 69 h / 195 °C 3: diisobutyl-aluminumhydride / hexane; 1,2-dimethoxy-ethane / -78 °C 4: n-Butyllithium / tetrahydrofuran / 5 h 5: 80 percent / 1,2-dimethoxy-ethane / 4 h / 170 °C View Scheme