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

HRID 1428620Notes

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-2fb4acf6e92b48e2b65b3bd33cae6586
Source dataset: uspto-grants-2015_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08937071B2

Reaction notes

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