Ethyl 4-chloroacetoacetate → HCID 86721242、化合物
反応式
[Br:1][C:2]1[N:6]([C:7]([CH3:10])([CH3:9])[CH3:8])[N:5]=[CH:4][C:3]=1[C:11](=[S:13])[NH2:12].Cl[CH2:15][C:16](=O)[CH2:17][C:18]([O:20][CH2:21][CH3:22])=[O:19]>C(O)C>[Br:1][C:2]1[N:6]([C:7]([CH3:8])([CH3:9])[CH3:10])[N:5]=[CH:4][C:3]=1[C:11]1[S:13][CH:15]=[C:16]([CH2:17][C:18]([O:20][CH2:21][CH3:22])=[O:19])[N:12]=1参加物
4
実験手順
A solution of the compound (2.80 g, 10.68 mmol) obtained in step 5 and ethyl 4-chloroacetoacetate (1.588 mL, 11.75 mmol) in ethanol (30 mL) was stirred at 80° C. for 16 hr. The reaction mixture was concentrated under reduced pressure, and the residue was purified by NH-silica gel column chromatography (solvent gradient; 3→50% ethyl acetate/hexane) to give ethyl 2-(2-(5-bromo-1-tert-butyl-1H-pyrazol-4-yl)thiazol-4-yl)acetate (2.55 g, 6.85 mmol, 64%) as a colorless oil