[C:1]([NH:6][N:7]=[C:8](OCC)[CH2:9][CH2:10][CH2:11][CH3:12])([O:3]CC)=O.[NH2:16][CH2:17][C:18]1[CH:36]=[CH:35][C:21]([O:22][CH:23]([C:28]2[CH:33]=[CH:32][CH:31]=[CH:30][C:29]=2[Cl:34])[C:24]([O:26][CH3:27])=[O:25])=[CH:20][CH:19]=1>C(O)C>[CH2:9]([C:8]1[N:16]([CH2:17][C:18]2[CH:36]=[CH:35][C:21]([O:22][CH:23]([C:24]([O:26][CH3:27])=[O:25])[C:28]3[CH:33]=[CH:32][CH:31]=[CH:30][C:29]=3[Cl:34])=[CH:20][CH:19]=2)[C:1](=[O:3])[NH:6][N:7]=1)[CH2:10][CH2:11][CH3:12]A mixture of approximately equimolar quantities of ethyl valerimidate carbethoxyhydrazone (from Step A) and methyl 2-[4-(aminomethyl)phenoxy]-2-(2-chlorophenyl)acetate (Step F) in ethanol is stirred at 80° C. under N2. After about 2 hours, or when TLC indicates complete reaction, the mixture is cooled and concentrated to dryness. The residue is re-concentrated from CH2Cl2 and then chromatographed on silica gel to yield the title compound.
Wird geladen…