Trifluoroacetic acid → HCID 59909762, compound

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Reaction Steps

A solution of methyl 2-{(1R)-1-[2-(tert-butoxy)-2-oxoethyl]-4-cyclohexylbutyl}-5-methyl-1,3-oxazole-4-carboxylate (Preparation 173) (2.92 g, 7.43 mmol) in anhydrous dichloromethane (15 ml) was treated with trifluoroacetic acid (7.5 ml) and the resulting mixture was stirred at room temperature under a nitrogen atmosphere for 24 hours. The solvent was removed under reduced pressure and the residue was azeotroped with dichloromethane (×3). The residue was purified by column chromatography on silica gel eluting with a gradient system of ethyl acetate:pentane (0:100 to 40:60) to afford the title compound as a colourless oil (2.50 g).

Provenance & Evidence