反应详情

To a cooled (0° C.) suspension of 5-(2,4-diamino-pyrimidin-5-yloxy)-4-isopropyl-2-methoxy-benzonitrile (0.138 g, 0.461 mmol) in dry methanol (15 ml) was bubbled with HCl gas for 10 minutes and refrigerated overnight. Solvent was evaporated under reduced pressure to give a yellow solid which was redissolved in dry methanol (10 ml). Ethylene diamine (0.034 ml, 0.509 mmol) was added and the reaction mixture was refluxed for 20 hours and concentrated under reduced pressure. The residue was purified by silica gel chromatography (gradient: 7-50% methanol in methylene chloride/0.1% concentrated NH4OH) to yield 5-[5-(4,5-dihydro-1H-imidazol-2-yl)-2-isopropyl-4-methoxy-phenoxy]-pyrimidine-2,4-diamine which was crystalized from methanol/ethyl acetate/ether as a white solid, (0.053 g, 33%).

1. temperatureTo a cooled
2. customwas bubbled with HCl gas for 10 minutes and refrigerated overnight
3. customSolvent was evaporated under reduced pressure
4. customto give a yellow solid which
5. temperaturethe reaction mixture was refluxed for 20 hours
6. concentrationconcentrated under reduced pressure
7. customThe residue was purified by silica gel chromatography (gradient: 7-50% methanol in methylene chloride/0.1% concentrated NH4OH)