1: toluene-4-sulfonic acid; 2(R),4(R)-dihydroxypentane / toluene / 24 h / Reflux 2: 3-chloro-benzenecarboperoxoic acid / dichloromethane / 16 h / 0 - 20 °C 3: sulfuric acid / ethanol / 3 h / Reflux View Scheme

sodium hydroxide; 4-nitroso-N,N-di-methylaniline anschliessend Erwaermen mit wss.H2SO4;

1: N,N-dimethyl-4-nitroso-aniline; aq.-ethanolic NaOH / anschliessend Erwaermen mit wss.H2SO4 2: NaCl; AlCl3 / 110 - 180 °C View Scheme