1.1: 91 percent / aq. H2SO4 / 2 h / Heating 2.1: aq. HCl; NaNO2 / cooling 2.2: Na2CO3 / H2O; toluene / Heating 3.1: 5.23 mmol / aq. H2SO4 / Heating View Scheme

sulfuric acid 2 h; Heating;

nitric acid

Multi-step reaction with 8 steps 1.1: 91 percent / aq. H2SO4 / 2 h / Heating2.1: aq. HCl; NaNO2 / cooling2.2: Na2CO3 / H2O; toluene / Heating3.1: 5.23 mmol / aq. H2SO4 / Heating4.1: 60 percent / LDA; HMPA / tetrahydrofuran; pentane / -78 - 20 °C5.1: 92 percent / LiAlH4 / diethyl ether / Heating6.1: 85 percent / pyridine / tetrahydrofuran / 0 - 20 °C7.1: TBAF / CD3CN / 0.17 h / 20 °C8.1: 24 percent Spectr. / CD3CN / 20 °C