Sodium Bicarbonate → HCID 68680210, compound

Participants

Reaction Steps

5-[4-(3-Fluoro-2-methoxyphenyl)-2-hydroxy-4-methyl-2-trifluoromethyl-pentylidenamino]-quinoline-2-carboxylic acid methyl ester (120 mg, 0.243 mmol) is dissolved in 2.0 ml of dichloromethane. Titanium tetrachloride (1 M solution in dichloromethane, 0.73 ml, 0.73 mmol) is added in drops within 15 minutes at −30° C. Then, the reaction mixture is allowed to stir for 3 hours at −30° C. to −15° C. By adding saturated sodium bicarbonate solution at −30° C., the reaction is brought to a halt. It is extracted with ethyl acetate, the combined organic phases are washed with water and saturated sodium chloride solution. After drying on sodium sulfate and after the solvent is removed in a vacuum as well as subsequent purification on silica gel with dichloromethane/methanol (0-3% methanol), 70 mg (58% of theory) of the product is obtained.

Provenance & Evidence