Potassium Carbonate → HCID 18451489, compound

HRID 1270716

Reaction equation

[F:1][C:2]1[C:8]([F:9])=[C:7](Br)[C:6]([F:11])=[C:5]([F:12])[C:3]=1[NH2:4].[CH3:13][O:14][C:15]1[CH:16]=[C:17](B(O)O)[CH:18]=[CH:19][CH:20]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C(=O)([O-])[O-].[K+].[K+]>COCCOC>[F:1][C:2]1[C:8]([F:9])=[C:7]([C:19]2[CH:18]=[CH:17][CH:16]=[C:15]([O:14][CH3:13])[CH:20]=2)[C:6]([F:11])=[C:5]([F:12])[C:3]=1[NH2:4]

Participants

Conditions

Temperature: 90 °C

Procedure

2,3,5,6-Tetrafluoro-4-bromoaniline (7.5 g, 30.7 mmol) is dissolved in DME (150 mL) and treated with 3-methoxyphenylboronic acid (4.7 g, 30.7 mmol), a catalytic amount of tetrakistriphenylphosphine palladium(0) (0.70 g, 0.6 mmol) and triphenylphosphine (0.66 g, 2.5 mmol). Potassium carbonate (8.5 μg in 50 mL of water) is added and the reaction mixture stirred and heated to 90° C. for 24 hours. After cooling to room temperature most of the DME is removed by rotary evaporator under high vacuum. The resulting material is partitioned between EtOAc (200 mL) and water (250 mL). The organic layer is washed with brine, dried (Na2SO4) and concentrated by rotary evaporator. The crude reaction product is purified by flash chromatography (9:1 hexanes/EtOAc, then 6:4 hexanes/EtOAC) to give 2,3,5,6-tetrafluoro-4-(3′-methoxyphenyl)aniline (m.p. 94–96° C.).

Workup

customis removed by rotary evaporator under high vacuum
customThe resulting material is partitioned between EtOAc (200 mL) and water (250 mL)
washThe organic layer is washed with brine
dry with materialdried (Na2SO4)
concentrationconcentrated by rotary evaporator
customThe crude reaction product
customis purified by flash chromatography (9:1 hexanes/EtOAc

Sources & evidence

ORD record: ord-c0a8c1fe4a3c4fe9b0f239282dd887b2
Source dataset: uspto-grants-2007_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07202364B2

Linked notes

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