Br[CH2:2][C:3]1[C:12]([O:13][CH3:14])=[C:11]([N+:15]([O-:17])=[O:16])[CH:10]=[CH:9][C:4]=1[C:5](OC)=[O:6].C[CH2:19][N:20](CC)CC.CN>CO>[CH3:14][O:13][C:12]1[C:11]([N+:15]([O-:17])=[O:16])=[CH:10][CH:9]=[C:4]2[C:3]=1[CH2:2][N:20]([CH3:19])[C:5]2=[O:6]To a solution of methyl 2-(bromomethyl)-3-methoxy-4-nitrobenzoate (300 mg, 1.0 mmol) in MeOH (10 mL) was added Et3N (120 mg, 1.2 mmol) and CH3NH2 (1.0 mL, 4M in MeOH). The solution was stirred at 70° C. for 4 h. The solvent was evaporated in vacuo, and the residue was purified by silica gel-column (eluting with PE/EA=10:1) to afford 4-methoxy-2-methyl-5-nitroisoindolin-1-one as a yellow solid (110 mg, yield 50%). m/z (ES+APCI)+: [M+H]+223.1.
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