3,4-Dichloroaniline → 2-(4-bromo-2-fluorophenyl)-N-(3,4-dichlorophenyl)acetamide

HRID 576227Notes

Reaction equation

[Br:1][C:2]1[CH:7]=[CH:6][C:5]([CH2:8][C:9]([OH:11])=O)=[C:4]([F:12])[CH:3]=1.[Cl:13][C:14]1[CH:15]=[C:16]([CH:18]=[CH:19][C:20]=1[Cl:21])[NH2:17].CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F.CCN(CC)CC>C(Cl)Cl>[Br:1][C:2]1[CH:7]=[CH:6][C:5]([CH2:8][C:9]([NH:17][C:16]2[CH:18]=[CH:19][C:20]([Cl:21])=[C:14]([Cl:13])[CH:15]=2)=[O:11])=[C:4]([F:12])[CH:3]=1

Participants

Conditions

Temperature: 20 °C

Procedure

To a solution of 2-(4-bromo-2-fluorophenyl)acetic acid (144 mg, 0.617 mmol), 3,4-dichloroaniline (100 mg, 0.617 mmol) and HATU (704 mg, 1.852 mmol) in DCM (20 mL) was added Et3N (0.258 mL, 1.852 mmol) dropwise. Then the mixture was stirred at 20° C. under a N2 atmosphere for 3 h. After LCMS analysis showed the starting material had disappeared, the solvent was removed in vacuo. Then the crude product was dissolved in DCM and washed with H2O and brine. The organic layer was evaporated to dryness to give the crude product which was purified by silica column chromatography (PE/EA=100/1 to 8/1) to afford pure product 2-(4-bromo-2-fluorophenyl)-N-(3,4-dichlorophenyl)acetamide (190 mg, 0.419 mmol, 67.8% yield): 1H NMR: (400 MHz, CD3OD) δ 10.25 (br. s, 1H), 7.89 (s, 1H), 7.44 (s, 2H), 7.28-7.37 (m, 3H), 3.74 (s, 2H); ES-LCMS: m/z 377.9 (M+H).

Workup

customthe solvent was removed in vacuo
dissolutionThen the crude product was dissolved in DCM
washwashed with H2O and brine
customThe organic layer was evaporated to dryness
customto give the crude product which
customwas purified by silica column chromatography (PE/EA=100/1 to 8/1)

Sources & evidence

ORD record: ord-ad395a5e6c9f4128a60973015b682cf0
Source dataset: uspto-grants-2015_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09035063B2

Reaction notes

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