FULL PAPERS
Metal-Free Direct Construction of Sulfonamides via Iodine-Mediated Coupling
temperature for 12–36 h. After the reaction, the resulting
mixture was extracted with EtOAc. The combined organic
phase was dried over anhydrous Na2SO4 and the solvent was
then removed under vacuum. The residue was purified by
flash column chromatography using a mixture of petroleum
ether and ethyl acetate as eluent to give the desired product
3 and 5.
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Acknowledgements
This work was supported by the National Natural Science
Foundation of China (No. 21302109, 21302110, and
21375075), the Taishan Scholar Foundation of Shandong
Province, the Excellent Middle-Aged and Young Scientist
Award Foundation of Shandong Province (BS2013YY019),
and the Scientific Research Foundation of Qufu Normal Uni-
versity (BSQD 2012020).
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