F[C:2]1[CH:7]=[CH:6][C:5]([N+:8]([O-:10])=[O:9])=[CH:4][CH:3]=1.[NH:11]1[CH2:15][CH2:14][CH:13]([NH:16][C:17](=[O:23])[O:18][C:19]([CH3:22])([CH3:21])[CH3:20])[CH2:12]1.O>CN(C)C=O>[N+:8]([C:5]1[CH:6]=[CH:7][C:2]([N:11]2[CH2:15][CH2:14][CH:13]([NH:16][C:17](=[O:23])[O:18][C:19]([CH3:21])([CH3:20])[CH3:22])[CH2:12]2)=[CH:3][CH:4]=1)([O-:10])=[O:9]A solution of 1-fluoro-4-nitrobenzene (508 mg, 3.6 mmol) and tert-butyl pyrrolidin-3-ylcarbamate (671 mg, 3.6 mmol) in N,N-dimethylformamide (7 mL) was heated at 55° C. for 1.5 hours and then stirred overnight at room temperature. The reaction mixture was poured into water and the suspension was filtered with water washes to provide the title compound after drying.
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