Sodium Nitrite → 6-(4-Benzyloxyphenoxy)pyridin-3-ol

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Reaction Steps

Sodium nitrite (1.84 g, 26.7 mmol) was dissolved in 32 ml of concentrated sulfuric acid at 0° C. Then, 6-(4-benzyloxyphenoxy)pyridin-3-ylamine (7.1 g, 24.29 mmol) in 75 ml of acetic acid were slowly added dropwise. After 1 h the ice bath was removed and stirring was continued for an hour. The reaction mixture was added dropwise to 250 ml of boiling water, and the mixture was stirred for 1 hour and after cooling extracted with ethyl acetate. The precipitated solid was filtered off and the filtrate was concentrated and purified by preparative HPLC (PR18, acetonitrile/water 0.1% TFA). Yield: 269 mg (4%), M+H+: 294.10.

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