Nitrogen → Trifluoromethanesulfonic acid 6-methoxy-1-[4-(2-piperidin-1-yl-ethoxy)benzoyl]-naphthalen-2-yl ester

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Reaction Steps

Dissolve (2-hydroxy-6-methoxy-naphthalen-1-yl)-[4-(2-piperidin-1-yl-ethoxy)-phenyl]-methanone in CH2Cl2 (10 volumes) in a three neck round bottom flask equipped with a stir bar and N2 source and chill to 0° C. in an ice/brine bath. Add pyridine (1.3 equivalents). Add trifluoromethane sulfonyl chloride (1.2 equivalents) via syringe over 15 minutes. The yellow slurry turns clear orange with this addition. The reaction is determined to be complete by HPLC analysis after 15 minutes. Quench the reaction with H2O (10 volumes), wash with 1 N HCl (5 volumes), wash with 1.0 N NaHCO3, and dry over Na2SO4. After concentration, trifluoro-methanesulfonic acid 6-methoxy-1-[4-(2-piperidin-1-yl-ethoxy)-benzoyl]-naphthalen-2-yl ester as a clean yellow foam is obtained in quantitative yield. Use the product without further purification.

Provenance & Evidence