1: 87 percent / copper(II)sulfate*5H2O, 28 percent aqueous ammonia 2: 63 percent / 1.) NaNO2, 15 percent aqueous hydrochloric acid; 2.) sodium azide / 2.) water 3: 48 percent / methanol; dioxane / Irradiation 4: 56 percent / CH2Cl2 / Irradiation View Scheme