[NH2:1][C:2]1[CH:3]=[C:4]2[C:8](=[CH:9][CH:10]=1)[C:7](=[C:11]1[C:19]3[C:14](=[CH:15][CH:16]=[CH:17][CH:18]=3)[NH:13][C:12]1=[O:20])[O:6][CH2:5]2.C(N(CC)C(C)C)(C)C.[C:30](Cl)(=[O:32])[CH3:31]>C1COCC1>[O:20]=[C:12]1[C:11](=[C:7]2[C:8]3[C:4](=[CH:3][C:2]([NH:1][C:30](=[O:32])[CH3:31])=[CH:10][CH:9]=3)[CH2:5][O:6]2)[C:19]2[C:14](=[CH:15][CH:16]=[CH:17][CH:18]=2)[NH:13]1To a solution of 3-(5-Amino-3H-isobenzofuran-1-ylidene)-1,3-dihydro-indol-2-one (50.0 mg, 0.189 mmol) and N,N-diisopropylethylamine (98.8 μL, 0.567 mmol) in 2.0 mL THF was added acetyl chloride (13.4 μL, 0.189 mmol). After stirring at room temperature for 3 h, the mixture was concentrated in vacuo and the solid triturated with MeOH. Filtering the mixture and rinsing with MeOH and hexanes/EtOAc (7:3) afforded the title compound (42.2 mg, 73%) as a yellow solid.
Wird geladen…