Hydrochloric Acid → 2,3-Difluoro-6-(2,2-diethoxycarbonylethenyl)amino-[(2-p-toluenesulfonyloxypropyl)oxy]benzene

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Reaction Steps

To a solution of 747 mg of the compound obtained in Example 3 in 2 ml of pyridine was added 710 mg of p-toluenesulfonyl chloride and the mixture was stirred under cooling with ice for 24 hours, and then at room temperature for 4 hours. To the mixture were added ethyl acetate and 1 N hydrochloric acid. The mixture was shaken, and the organic layer was separated. The organic layer was washed with water and dried over anhydrous magnesium sulfate. The solvent was removed under reduced pressure. The residue was purified through silica gel column chromatography to yield 1.0 g of the titled compound.

Provenance & Evidence