naringinase in phosphate buffer; ethanol T=40°C; pH=4.0; 240 h;

potassium hydroxide in methanol T=20°C;

1.1: 19.7 percent / pyridine; CrO3 / 20 h / 20 °C 2.1: Ag2O; 4 Angstroem molecular sieves / 1,2-dichloro-ethane / 20 °C 2.2: NaBH4 / propan-2-ol / 3 h / 20 °C 2.3: 0.32 g / pyridine / 3 h / 90 °C 3.1: 100 percent / KOH / methanol / 20 °C View Scheme

1.1: Ag2O; 4 Angstroem molecular sieves / 1,2-dichloro-ethane / 20 °C 1.2: NaBH4 / propan-2-ol / 3 h / 20 °C 1.3: 0.32 g / pyridine / 3 h / 90 °C 2.1: 100 percent / KOH / methanol / 20 °C View Scheme

1: 30.1 percent / pyridine / 72 h / Ambient temperature 2: 10percent KOH / methanol View Scheme