4-(Difluoromethoxy)aniline → 3-{[4-(Difluoromethoxy)phenyl]amino}-1-(2-methoxyethyl)-4-phenyl-1H-pyrrole-2,5-dione

HRID 2113751Notes

Reaction equation

Cl[C:2]1[C:3](=[O:18])[N:4]([CH2:14][CH2:15][O:16][CH3:17])[C:5](=[O:13])[C:6]=1[C:7]1[CH:12]=[CH:11][CH:10]=[CH:9][CH:8]=1.[F:19][CH:20]([F:29])[O:21][C:22]1[CH:28]=[CH:27][C:25]([NH2:26])=[CH:24][CH:23]=1>CN(C=O)C>[F:19][CH:20]([F:29])[O:21][C:22]1[CH:23]=[CH:24][C:25]([NH:26][C:2]2[C:3](=[O:18])[N:4]([CH2:14][CH2:15][O:16][CH3:17])[C:5](=[O:13])[C:6]=2[C:7]2[CH:12]=[CH:11][CH:10]=[CH:9][CH:8]=2)=[CH:27][CH:28]=1

Participants

Conditions

Temperature: 150 °C

Procedure

3-Chloro-1-(2-methoxyethyl)-4-phenyl-1H-pyrrole-2,5-dione (0.13 mmol, 36 mg) and 4-difluoromethoxyaniline (0.28 mmol, 45 mg) were dissolved in DMF (1 mL). The mixture was heated in a microwave reactor at 150° C. for 20 min. After cooling, the reaction mixture was purified by HPLC (95% 0.1M ammonium acetate buffer: 5% CH3CN→100% CH3CN) to give 13 mg (24%) of the title compound. 1H NMR (400 MHz, CDCl3): δ 7.25 (bs, 1H), 7.19-7.08 (m, 3H), 7.02-6.97 (m, 2H), 6.81-6.75 (m, 2H), 6.66-6.60 (m, 2H), 6.36 (t, J=74.0 Hz, 1H), 3.83 (t, J=5.7 Hz, 2H), 3.63 (t, J=5.7 Hz, 2H), 3.38 (s, 3H)

Workup

temperatureAfter cooling
customthe reaction mixture was purified by HPLC (95% 0.1M ammonium acetate buffer: 5% CH3CN→100% CH3CN)

Sources & evidence

ORD record: ord-4b743b4d55494726941fe8309eb080dd
Source dataset: uspto-grants-2008_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07432288B2

Reaction notes

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