1: 99 percent / Amberlite IR-120B (H+-form) / methanol / 38 h / Heating 2: 95 percent / KOH / methanol / 1 h / Heating View Scheme

<b>Multi-step reaction with 2 steps<br /> </b>1: 98 percent / imidazole / dimethylformamide / 5 h / 20 &deg;C<br />2: dihydroquinidine 1,4-anthraquinonediyl diether; MeSO₂NH₂; K₂OsO₂(OH)4; K₂CO₃; K₃Fe(CN)6 / 2-methyl-propan-2-ol; H₂O / 20 h / 4 &deg;C<br /> <br /> &nbsp;

<b>Multi-step reaction with 3 steps<br /> </b>1: benzene / 2 h / Heating<br />2: 99 percent / imidazole / dimethylformamide / 5 h / 20 &deg;C<br />3: K₃Fe(CN)6; K₂CO₃; MeSO₂NH₂ / dihydroquinidine 1,4-anthraquinonediyl diether / 2-methyl-propan-2-ol; H₂O / 24 h / 4 &deg;C<br /> <br /> &nbsp;

<b>Multi-step reaction with 2 steps<br /> </b>1: 98 percent / imidazole / dimethylformamide / 5 h / 20 &deg;C<br />2: dihydroquinidine 1,4-anthraquinonediyl diether; MeSO₂NH₂; K₂OsO₂(OH)4; K₂CO₃; K₃Fe(CN)6 / 2-methyl-propan-2-ol; H₂O / 20 h / 4 &deg;C<br /> <br /> &nbsp;