* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
With ammonium hydroxide; palladium on activated charcoal; hydrogen; In methanol;
In 1000ml single neck flask of <strong>[246847-98-3]2-amino-3-fluoro-5-chloropyridine</strong> (50g, 0.341mol) was dissolved in methanol (600ml) was added aqueous ammonia (50ml), with hydrogen in the Pd (2.5g, 23.5mmol) under catalytic reduction, the reaction was completed, filtration to remove Pd / C, and the filter cake washed with methanol, the filtrate concentrated under reduced pressure to give a white solid crude, the crude dissolved in water, (200ml * 4) and extracted with ethyl acetate, the organic layer was collected with anhydrous NaSO4Sulfate, and concentrated under reduced pressure, a small amount of petroleum ether beating, suction filtration to give white crystals 34.50g, 90.20% yield.