Hydrochloric Acid → 5-(3-Isopropoxymethyl-phenyl)-oxazole-4-carboxylic acid

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Reaction Steps

In a flame dried round-bottomed flask equipped with a magnetic stir bar and under inert atmosphere (N2), a solution of 5-(3-isopropoxymethyl-phenyl)-oxazole-4-carboxylic acid isopropyl ester (78 mg, 0.26 mmol) in THF (2.5 mL) was treated with a 1N NaOH (1.3 mL). The resulting mixture was stirred for 1.5 h then acidified with 1N HCl, extracted twice with EA (2×20 mL) and the combined organic phases were washed with brine (20 mL). The organic layer was dried over MgSO4, filtered, and the solvent removed under reduced pressure to give the title compound as a yellow oil. LC-MS-conditions 02: tR=0.87 min, [M+AcCN+H]+=303.18.

Provenance & Evidence