Trifluoroacetic acid → 6-[4-(azetidin-3-yloxy)-3-methoxy-phenyl]-2-(4-chloro-phenyl)-5,6-dihydro-4H-thieno[2,3-c]pyridin-7-one

Participants

Reaction Steps

Dissolve 3-{4-[2-(4-chloro-phenyl)-7-oxo-4,7-dihydro-5H-thieno[2,3-c]pyridin-6-yl]-2-methoxy-phenoxy}-azetidine-1-carboxylic acid tert-butyl ester (924 μmol, 500 mg) in dichloromethane (10 mL), add trifluoroacetic acid (5 mL), and stir the reaction at room temperature for 2 h. Concentrate the material in vacuo and partition the residue between 1N NaOH (10 mL) and CH2Cl2 (15 mL). Separate the organic portion and extract the aqueous portion with CH2Cl2 (3×10 mL). Dry the combined organics over Na2SO4, filter, and concentrate to dryness to afford 320 mg of 6-[4-(azetidin-3-yloxy)-3-methoxy-phenyl]-2-(4-chloro-phenyl)-5,6-dihydro-4H-thieno[2,3-c]pyridin-7-one as a white solid.

Provenance & Evidence