[I:1][C:2]1[C:3]([O:11][CH3:12])=[C:4]([CH:8]=[CH:9][CH:10]=1)[C:5](O)=[O:6].S(Cl)([Cl:15])=O>>[I:1][C:2]1[C:3]([O:11][CH3:12])=[C:4]([CH:8]=[CH:9][CH:10]=1)[C:5]([Cl:15])=[O:6]To 3-iodo-2-methoxy-benzoic acid (8.29 g, 29.8 mmol) was added thionyl chloride (15 mL). The resulting solution was stirred for 2 minutes then heated to 82° C. and stirred at this temperature for 30 minutes. The solution was then concentrated under reduced pressure to give the title compound. This material was used without further purification.
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