1: 91 percent / sodium hydride, tetrabutylammonium iodide / tetrahydrofuran 2: 67 percent / hydrogen chloride 4: tin(II)-chloride / methanol 5: sodium acetate / ethanol 7: trifluoroacetic acid / dioxane; H2O 8: sodium borohydride / ethanol 9: hydrogen / palladium black / acetic acid View Scheme