Trifluoroacetic acid → HCID 178499334, compound

Participants

Reaction Steps

The product from step IV (5.198 g) is dissolved in 30 mL of CH2Cl2 and treated with 20 mL of trifluoroacetic acid. The mixture is stirred at room temperature overnight, then it is evaporated to dryness, obtained residue is redissolved in CH2Cl2 and washed with aqueous NaHCO3 and brine. Organic fraction is separated, dried over Na2SO4, and concentrated to give 5.340 g of crude 5-(3,3-dimethyl-but-1-ynyl)-3-[(trans-4-methyl-cyclohexanecarbonyl)-(piperidin-4-yl)amino]-thiophene-2-carboxylic acid methyl ester.

Provenance & Evidence