Ethyl Acetate → N-(2-Aminophenyl)-4-[3-(2,3-dihydrobenzo[1,4]dioxin-6-yl)-1-[3-(4-methylpiperazin-1-yl)propyl]ureidomethyl]benzamide

Participants

Reaction Steps

4.0 M hydrogen chloride ethyl acetate solution (10 mL) was added to a solution of N-(2-t-butoxycarbonylaminophenyl)-4-[3-(2,3-dihydrobenz o[1,4]dioxin-6-yl)-1-[3-(4-methylpiperazine-1-yl)propyl]ureidomethyl]benzamide (Reference Compound No. 13-1, 450 mg, 0.68 mmol) in a mixed solvent (ethyl acetate (10 mL) and methanol (10 mL)), and then the mixture was stirred at room temperature for 2.5 hours. Saturated aqueous sodium hydrogen carbonate solution (150 mL) was added thereto, the whole was extracted with chloroform (150 mL), and then the organic layer was washed with brine (150 mL). The organic layer was dried over anhydrous sodium sulfate, and then the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (NH-modified silica gel, chloroform-methanol) to give 310 mg of the title compound as a colorless amorphous product. (Yield 82%)

Provenance & Evidence