Trifluoromethanesulfonic acid → HCID 20760424, compound

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Reaction Steps

Trifluoromethanesulfonic acid anhydrous (0.27 mL, 1.6 mmol) is added dropwise in 10 minutes to a solution of 2-hydroxy-naphthalene-1-Carboxylic acid indan-2-yl-(2-fluoro-benzyl)-amide (17) (323 mg, 0.8 mmol) in anhydrous pyridine (5 mL) at 0° C. under nitrogen. The mixture is stirred at room temperature overnight and concentrated under reduced pressure. The residue (18) is dried in vacuo and used for the next step without further purification.

Provenance & Evidence