[CH2:1]([O:8][C:9]1[CH:14]=[CH:13][C:12]([Cl:15])=[CH:11][C:10]=1[CH2:16][C:17]([CH3:19])=[O:18])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.CO[CH:22](OC)[N:23]([CH3:25])[CH3:24]>C1(C)C=CC=CC=1>[CH2:1]([O:8][C:9]1[CH:14]=[CH:13][C:12]([Cl:15])=[CH:11][C:10]=1/[C:16](=[CH:22]/[N:23]([CH3:25])[CH3:24])/[C:17](=[O:18])[CH3:19])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1A mixture of the product from step (ii) (5.72 g) and dimethylformamide dimethyl acetal (3.5 ml) in toluene (50 ml) were heated at 100° C. for 12 h. The solvent was evaporated under reduced pressure to give an oil, 6.37 g.
Wird geladen…