1: 2.6 g / m-CPBA 2: 21 percent / fuming HNO3, conc. H2SO4 / 2.5 h / Heating 3: 85 percent / NaBH4 / 5percent Pd/C / methanol 4: 1) fluoroboric acid, NaNO2 / 1) water, 2) heating View Scheme

1: 21 percent / fuming HNO3, conc. H2SO4 / 2.5 h / Heating 2: 85 percent / NaBH4 / 5percent Pd/C / methanol 3: 1) fluoroboric acid, NaNO2 / 1) water, 2) heating View Scheme

1: 85 percent / NaBH4 / 5percent Pd/C / methanol 2: 1) fluoroboric acid, NaNO2 / 1) water, 2) heating View Scheme

tetrafluoroboric acid; sodium nitrite 1) water, 2) heating; Yield given. Multistep reaction;