Hydrochloric Acid → (2-Chloropyridin-4-yl)methanol

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Reaction Steps

4-Carboxy-2-chloropyridine (78.7 g) is added slowly to a suspension of sodium borohydride (28.4 g) in tetrahydrofuran (750 ml) under nitrogen atmosphere, and thereto is added dropwise boron trifluoride-ether complex (123 ml). The mixture is reacted at room temperature for six hours. To the mixture is added a 6 M hydrochloric acid (960 ml), and the mixture is concentrated under reduced pressure to remove the solvent. The resultant is basified with sodium hydroxide, and extracted with chloroform, The chloroform layer is washed with a saturated aqueous sodium hydrogen carbonate solution, dried and concentrated under reduced pressure to remove the solvent to give 2-chloro-4-hydroxymethylpyridine (62.2 g).

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