反应详情

1-(2,4-dichlorophenyl)-2-chloroethan-1-one(1 mmol) and methylpiperazine(4 mmol) in 8 ml DMF was stirred for 8 h at room temperature. The reaction mixture was then concentrated in vacuo and extracted into ethyl acetate and the organic layer was washed with water and dried with sodium sulfate. The residue after concentration in vacuo was purified by column chromatography eluting with 10% methanol in methylene chloride to yield 1-(2,4-dichlorophenyl)-2-(4-methylpiperazinyl)ethan-1-one. 1-(2,4-dichlorophenyl)-2-(4-methylpiperazinyl)ethan-1-one was heated to 80° C. in neat DMF-DMA for six hours. The reaction mixture was concentrated in vacuo and the residue obtained was purified by trituration with diethyl ether to yield the enaminone. 1 mmol of the enaminone obtained above, 1 mmol of amino {2-[(5-nitro(2-pyridyl))amino]ethyl}carboxamidine hydrochloride and 1.3 mmol of Cs2CO3 were dissolved in DMF and heated to 90° C. for fourteen hours. The reaction mixture was cooled to room temperature and concentrated in vacuo. Water was added and then extracted 3× with ethyl acetate. The combined organic layers were dried with sodium sulfate. The residue after solvent evaporation was purified by column chromatography eluting with 5-10% methanol in methylene chloride to yield [4-(2,4-dichlorophenyl)-5-(4-methylpiperazinyl)pyrimidin-2-yl]{2-[(5-nitro(2-pyridyl))amino]ethyl}amine as a yellow powder after lyophilization.

1. concentrationThe reaction mixture was then concentrated in vacuo
2. extractionextracted into ethyl acetate
3. washthe organic layer was washed with water
4. dry with materialdried with sodium sulfate
5. concentrationThe residue after concentration in vacuo
6. customwas purified by column chromatography
7. washeluting with 10% methanol in methylene chloride