反应详情

To a solution of 2-(4-(diethylamino)phenyl)thiazol-5-amine (0.45 g, 1.82 mmol) in CH2Cl2 (20 mL) was added trimethylaluminum (4.5 mL, 9.0 mmol, 2 M in toluene) dropwise at rt. The reaction mixture was stirred at rt for 1 h, followed by the addition of a solution of methyl 3-acetaminocrotonate ((315 mg, 2 mmol) in anhydrous CH2Cl2 (5 mL). The reaction mixture was stirred at rt for 3 days, then quenched with saturated NH4Cl aqueous solution and extracted with CH2Cl2 (50 mL×3). The combined organic phases were dried over Na2SO4 and concentrated in vacuo. The residue was purified by a silica gel column chromatography to give the title compound as a yellow solid (22 mg, 3%). The compound was characterized by the following spectroscopic data:

1. stirringThe reaction mixture was stirred at rt for 3 days
2. customquenched with saturated NH4Cl aqueous solution
3. extractionextracted with CH2Cl2 (50 mL×3)
4. dry with materialThe combined organic phases were dried over Na2SO4
5. concentrationconcentrated in vacuo
6. customThe residue was purified by a silica gel column chromatography