Pyridine → 1-(4-Chlorophenyl)-2-(2,4-dichlorophenyl)ethane-1,2-dione

HRID 1452508

Reaction equation

[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([CH2:8][C:9]([C:11]2[CH:16]=[CH:15][C:14]([Cl:17])=[CH:13][C:12]=2[Cl:18])=[O:10])=[CH:4][CH:3]=1.C1C=C[NH+]=CC=1.[O-:25][Cr](Cl)(=O)=O.N1C=CC=CC=1>ClCCCl>[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8](=[O:25])[C:9]([C:11]2[CH:16]=[CH:15][C:14]([Cl:17])=[CH:13][C:12]=2[Cl:18])=[O:10])=[CH:4][CH:3]=1

Participants

Conditions

Temperature: 25 °C

Procedure

2-(4-Chlorophenyl)-1-(2,4-dichlorophenyl)ethanone (2.7 g, 9.01 mmol) was dissolved in 1,2-dichloroethane (25 ml) and freshly made PCC (3.89 g, 18.02 mmol), pyridine (1.43 g, 18.02 mmol) and molecular sieves were added. The reaction mixture was refluxed under inert atmosphere overnight. The solution was cooled to 25° C., filtered through Silica and then solvent was evaporated under reduced pressure. The crude product (1.9 g, 66%) was used directly in the next step. 1H NMR (500 MHz) δ 7.97 (d, 2H), 7.84 (d, 1H), 7.52 (d, 2H), 7.46 (s, 1H), 7.44 (d, 1H).

Workup

temperatureThe reaction mixture was refluxed under inert atmosphere overnight
filtrationfiltered through Silica
customsolvent was evaporated under reduced pressure

Sources & evidence

ORD record: ord-51ee4d950a064eb9828639cacff9be8e
Source dataset: uspto-grants-2009_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07473693B2

Linked notes

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