Hydrochloric Acid → 5-Ethyl-2-pyridyl-4-isopropyl-4-methyl-5-oxo-2-imidazoline-1-acetic acid

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Reaction Steps

A stirred solution of ethyl 2-(5-ethyl-2-pyridyl)-4-isopropyl-4-methyl-5-oxo-2-imidazoline-1-acetate (2.12 g, 6.41 mmol) in tetrahydrofuran is treated with 2N sodium hydroxide (8 mL). The resulting mixture is stirred at room temperature for 16 hours. After this period, the reaction mixture is concentrated in vacuo to obtain a residue. The residue is acidified with concentrated hydrochloric acid and then extracted with ether. The organic extract is dried over magnesium sulfate, vacuum filtered through diatomaceous earth and concentrated in vacuo to give the title product as a white solid, mp 134°-136° C.

Provenance & Evidence