potassium hydroxide in methanol Hydrolysis; 1 h; Heating;

1: diethyl ether; tetrahydrofuran / 0.17 h / 0 °C 2: benzene / 2 h / Heating 3: 99 percent / imidazole / dimethylformamide / 5 h / 20 °C 4: K3Fe(CN)6; K2CO3; MeSO2NH2 / dihydroquinidine 1,4-anthraquinonediyl diether / 2-methyl-propan-2-ol; H2O / 24 h / 4 °C 5: 99 percent / Amberlite IR-120B (H+-form) / methanol / 38 h / Heating 6: 95 percent / KOH / methanol / 1 h / Heating View Scheme

1: benzene / 2 h / Heating 2: 99 percent / imidazole / dimethylformamide / 5 h / 20 °C 3: K3Fe(CN)6; K2CO3; MeSO2NH2 / dihydroquinidine 1,4-anthraquinonediyl diether / 2-methyl-propan-2-ol; H2O / 24 h / 4 °C 4: 99 percent / Amberlite IR-120B (H+-form) / methanol / 38 h / Heating 5: 95 percent / KOH / methanol / 1 h / Heating View Scheme

1: 99 percent / imidazole / dimethylformamide / 5 h / 20 °C 2: K3Fe(CN)6; K2CO3; MeSO2NH2 / dihydroquinidine 1,4-anthraquinonediyl diether / 2-methyl-propan-2-ol; H2O / 24 h / 4 °C 3: 99 percent / Amberlite IR-120B (H+-form) / methanol / 38 h / Heating 4: 95 percent / KOH / methanol / 1 h / Heating View Scheme

1: K3Fe(CN)6; K2CO3; MeSO2NH2 / dihydroquinidine 1,4-anthraquinonediyl diether / 2-methyl-propan-2-ol; H2O / 24 h / 4 °C 2: 99 percent / Amberlite IR-120B (H+-form) / methanol / 38 h / Heating 3: 95 percent / KOH / methanol / 1 h / Heating View Scheme

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

hydrogenchloride 2.) methanol, water; Yield given. Multistep reaction. Title compound not separated from byproducts;