1.1: 71 percent / diisobutylaluminium hydride / CH2Cl2 / 3.5 h / -78 °C 2.1: LDA / tetrahydrofuran; diethyl ether / 0.5 h / -78 °C 2.2: 87 percent / tetrahydrofuran; diethyl ether / 3 h / -78 - 0 °C 3.1: 95 percent / tetrabutylammonium fluoride / tetrahydrofuran / 2 h / 20 °C 4.1: 73 percent / quinoline; hydrogen / palladium on BaSO4 / ethyl acetate / 3 h / 20 °C / 750.06 Torr 5.1: 82 percent / triethylamine / CH2Cl2 / 0 - 20 °C 6.1: 78 percent / bis(tricyclohexylphosphine) benzylidene Ru(IV) dichloride / CH2Cl2 / 6 h / Heating View Scheme