1: acetonitrile / 1 h / Ambient temperature 2: 2.) 2,3-dichloro-5,6-dicyano-p-benzoquinone / 1.) MeCN, r.t., 14 h, 2.) MeCN, MeOH, r.t., 30 min View Scheme

2,3-dicyano-5,6-dichloro-p-benzoquinone 1.) MeCN, r.t., 14 h, 2.) MeCN, MeOH, r.t., 30 min; Yield given. Multistep reaction. Yields of byproduct given;

Multi-step reaction with 3 steps 1: 95 percent / conc. H2SO4 / aq. ethanol / 14 h / Ambient temperature2: 95 percent / 20 percent NaOH / ethanol / 5 h / Heating3: 78 percent / ethanolamine / 5 h / 170 °C  

Multi-step reaction with 3 steps 1: DBU / tetrahydrofuran; propan-2-ol / 4 h / Ambient temperature2: p-TsOH / ethanol / 2 h / Heating3: NaOH / ethane-1,2-diol / 1 h / Heating