1: 82 percent / hydrogen chloride / ethanol / 0.5 h 2: 1.) hydrogen chloride, 2.) Na2CO3 / 1.) EtOH, 3 h, 2.) H2O, reflux, 1 h View Scheme

1: 35 percent / hydrogen chloride / ethanol / 0.5 h 2: 82 percent / hydrogen chloride / ethanol / 0.5 h 3: 1.) hydrogen chloride, 2.) Na2CO3 / 1.) EtOH, 3 h, 2.) H2O, reflux, 1 h View Scheme

hydrogenchloride; sodium carbonate 1.) EtOH, 3 h, 2.) H2O, reflux, 1 h; Yield given. Multistep reaction. Yields of byproduct given;

hydrogenchloride; sodium carbonate 1.) AcOH, room temperature, 15 h, 2.) H2O, EtOH, reflux, 1 h; Yield given. Multistep reaction. Yields of byproduct given;

hydrogenchloride; sodium carbonate multistep reaction: 1.) AcOH, room temperature, 15 h, 2.) EtOH, H2O, reflux, 1 h; reaction with substituted acetophenones; condensation of 2,7-dihydroxynaphthalene with aroylacetaldehydes in acid condition; Product distribution;