反应详情

温度

145 °C

To a flask under Argon was added 4-amino-2,5,6-trichloropyrimidine (0.08564 mol), 4-amino-benzonitrile (0.1071 mol), 1-methyl-2-pyrrolidinone (17 ml) and HCl in diethylether (1M; 85.6 ml). The mixture was placed in an oil bath at 130° C. under a stream of nitrogen until the ether was gone. An additional 10 ml of 1-methyl-2-pyrrolidinone was added. The mixture was heated at 145° C. for 16 hours under argon. 1,4-Dioxane was added. The mixture was refluxed, cooled, then filtered. The filtrate was evaporated. The residue was dissolved in CH2Cl2, washed with 1 N NaOH, then filtered. The solid was dissolved in 2-propanone, evaporated onto silica gel, and chromatographed using 1–3% 2-propanone in hexane as eluent. The pure fractions were collected and the solvent was evaporated, yielding 1.63 g (6.8%) of 4-[(4-amino-5,6-dichloro-2-pyrimidinyl)amino]benzonitrile (interm. 12).

1. temperatureThe mixture was refluxed
2. temperaturecooled
3. filtrationfiltered
4. customThe filtrate was evaporated
5. dissolutionThe residue was dissolved in CH2Cl2
6. washwashed with 1 N NaOH
7. filtrationfiltered
8. dissolutionThe solid was dissolved in 2-propanone
9. customevaporated onto silica gel
10. customchromatographed
11. customThe pure fractions were collected
12. customthe solvent was evaporated