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In this thesis, we found that these two coupling reactions can be achieved in the presence of low-cost iron salts and 2,2’-diamino-6,6’-dimethylbiphenyl. Furthermore, an iodine-catalyzed disulfidation reactions of alkenes was developed in this thesis. The thesis includes the following parts:（1） Iron-catalyzed Suzuki-Miyaura coupling reactions of aryl iodides and bromides with arylboronic acids, which using Fe2O3 as iron source and 2,2’-diamino-6,6’-dimethylbiphenyl as ligand, has achieved a good result. （2） Iron-catalyzed Mizoroki-Heck reactions of aryl iodides with methyl acrylate and styrene, which using respectively FeCl3.6H2O and Fe（acac）3 as iron source and 2,2’-diamino-6,6’-dimethylbiphenyl as ligand, has achieved a good result. （3） iodine-catalyzed disulfidation of alkenes. We found that the disulfidation of alkenes can be achieved at room temperature with water or 1,2-dichloroethane as the solvent, respectively.
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