Sodium Hydroxide → 3,4,6-Trichloro-2-pyridinecarboxylic acid

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Reaction Steps

To methyl 3,4,6-Trichloropicolinate (3.57 g, 14.85 mmol) in 20 mL of methanol was added 1N NaOH (14.85 mL, 14.85 mmol). The reaction mixture was stirred at room temperature for 1 hr and then concentrated to dryness in vacuo. 100 mL each of diethyl ether and H2O were added. Aqueous layer was acidified with 1N HCl until pH=2. Methylene chloride was added and the aqueous phase was extracted with additional CH2Cl2 (2×100 mL). The combined extracts were dried (MgSO4) and concentrated to give 3.13 g of a white solid. 1H NMR(CDCl3): δ 7.50 (s, 1H).

Provenance & Evidence