[C:1]([N:4]([CH2:14]C)[C:5]1[CH:10]=[CH:9][C:8]([N+:11]([O-:13])=[O:12])=[CH:7][CH:6]=1)(=[O:3])[CH3:2].[C:16](Cl)(=O)CC>C1C=CC=CC=1>[C:1]([N:4]([CH3:14])[C:5]1[CH:10]=[CH:9][C:8]([N+:11]([O-:13])=[O:12])=[CH:7][CH:6]=1)(=[O:3])[CH2:2][CH3:16]The reaction is carried out using an analogous method to (9a), using N-methyl-4 nitroanilinc (5 g, 32.86 mmol) in benzene (30 ml), treated with propionyl chloride (15 ml). ES+ (M+1) 208.88.
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