[I:1][C:2]1[C:10]([CH3:11])=[CH:9][CH:8]=[CH:7][C:3]=1[C:4](O)=[O:5].S(Cl)([Cl:14])=O>C1COCC1>[I:1][C:2]1[C:10]([CH3:11])=[CH:9][CH:8]=[CH:7][C:3]=1[C:4]([Cl:14])=[O:5]2-iodo-3-methyl benzoic acid (1310 mg, 5 mmol) and thionyl chloride (730 μL, 10 mmol) were dissolved into THF (10 mL) and stirred at RT for 4 days. The solvents were removed in vacuo and the resulting residue was dissolved into EtOAc, washed with brine. The combined organic layers were dried (MgSO4) and the solvents were removed in vacuo resulting in an oil that was used without further purification or characterization.
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