1: 61percent HNO3, conc. H2SO4 2: H2 / 5percent Pd/C / methanol 3: 1.) 42percent HBF4, isoamyl nitrite / 1.) MeOH, 0 deg C, 4 h, 2.) xylene, reflux, 5 h View Scheme

1: H2 / 5percent Pd/C / methanol 2: 1.) 42percent HBF4, isoamyl nitrite / 1.) MeOH, 0 deg C, 4 h, 2.) xylene, reflux, 5 h View Scheme

tetrafluoroboric acid; isopentyl nitrite 1.) MeOH, 0 deg C, 4 h, 2.) xylene, reflux, 5 h; Yield given. Multistep reaction;