反应详情

A mixture of p-toluenesulfonic acid (10 mg), 2-(4-Fluoro-phenyl)-1-(2-methylthio-pyrimidin-4-yl)-ethanone (200 mg, 0.76 mmoles) and 3-amino-2-chloropyridine (90 mg, 0.7 mmoles) in 3 mL of toluene was refluxed overnight with a Dean-Stark removal of water/toluene azeotrope. The reaction mixture was further concentrated, the brown residue suspended in an ethyl acetate/hexane mixture (9/1) and filtered. The solid was solubilised in ethyl acetate and purified by chromatography on silica gel (ethylacetate/hexane 1/1) to give 130 mg of (2-Chloro-pyridin-3-yl)-[2-(4-fluoro-phenyl)-1-(2-methylthio-pyrimidin-4-yl)-ethylidene]-amine as a brown oil.

1. filtrationfiltered
2. custompurified by chromatography on silica gel (ethylacetate/hexane 1/1)