反应详情

Heat a mixture of 3,6-dichloro-4,5-dimethylpyridazine (6.90 g, 39.0 mmol), N-benzylethylenediamine (8.78 g, 58.5 mmol), and diisopropylethylamine (25.2 g, 195 mmol) in DMSO (78 mL) at 120° C. for 3 d. Cool the reaction mixture, pour into H2O, and extract the mixture with Et2O. Wash the organic layer with H2O, dry over Na2SO4, filter, and concentrate under reduced pressure. Purify the residue using flash silica gel chromatography (gradient of 0 to 5% 2 M NH3/MeOH in CH2Cl2) to obtain the title compound as a waxy solid (6.41 g, 57%). ES/MS m/z 291.2 (M+1).

1. temperatureHeat
2. temperatureCool the reaction mixture
3. extractionextract the mixture with Et2O
4. washWash the organic layer with H2O
5. dry with materialdry over Na2SO4
6. filtrationfilter
7. concentrationconcentrate under reduced pressure
8. customPurify the residue