P-Anisidine → 3-[(4-methoxyphenyl)amino]-4-phenyl-1H-pyrrole-2,5-dione

HRID 2113748Notes

Reaction equation

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

Participants

Conditions

Temperature: 150 °C

Procedure

To a solution of 3-chloro-4-phenyl-1H-pyrrole-2,5-dione (4.84 mmol, 1.0 g) in dry DMF (5 mL) was added 4-methoxyaniline (4.87 mmol, 600 mg) and the reaction mixture was subjected to microwave heating single node 150° C., 15 min, followed by 150° C., 10 min. The solvent was evaporated, and the crude mixture was partitioned between dichloromethane and water. The organic phase was dried over anhydrous Na2SO4, concentrated and the residue was purified on SiO2 (Heptane:EtOAc, 3:1→2:1) to give 457 mg (32%) of the title compound. 1H NMR (400 MHz, DMSO-d6) δ 10.62 (s, 1H), 9.27 (s, 1H), 7.09-6.99 (m, 3H), 6.87-6.83 (m, 2H), 6.65-6.60 (m, 2H), 6.52-6.47 (m, 2H), 3.58 (s, 3H).

Workup

customThe solvent was evaporated
customthe crude mixture was partitioned between dichloromethane and water
dry with materialThe organic phase was dried over anhydrous Na2SO4
concentrationconcentrated
customthe residue was purified on SiO2 (Heptane:EtOAc, 3:1→2:1)

Sources & evidence

ORD record: ord-4e15378e3b8b48d491ab2f27c53f920d
Source dataset: uspto-grants-2008_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07432288B2

Reaction notes

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