反应详情

To the solution of 6-chloropyridazine-3-carboxylic acid (375 mg, 2.37 mmol) in 5 mL of dioxane was added thionyl chloride (420 mg, 3.56 mmol). The mixture was refluxed for 4 hours and the solvent was removed in vacuo. 2-Amino-1-cyclopropylethanol (479 mg, 4.73 mmol) in 5 mL of dioxane was added to the residue and followed by the addition of triethylamine (0.2 mL). The mixture was stirred at ambient temperature overnight. Water was added to the mixture and then extracted with ethyl acetate. The organic extract was separated, washed with water and brine; dried over Na2SO4. The residue after removal of solvent was purified by column chromatography eluted with ethyl acetate:hexane (70:30) to yield 58 mg of the white desired product.

1. temperatureThe mixture was refluxed for 4 hours
2. customthe solvent was removed in vacuo
3. extractionextracted with ethyl acetate
4. extractionThe organic extract
5. customwas separated
6. washwashed with water and brine
7. dry with materialdried over Na2SO4
8. customThe residue after removal of solvent
9. customwas purified by column chromatography
10. washeluted with ethyl acetate:hexane (70:30)