Preparation method of 2,6-diaminotoluene

The invention relates to the synthetic field of fine organic intermediates, specifically to a method for preparing 2,6-diaminotoluene by catalytic ammoniation. The method comprises the following steps: using anhydrous ethanol as a solvent, using 2,6-dichlorotoluene as a starting material, using ammonia water as an aminating agent, and heating and stirring the materials at normal pressure under the action of a palladium complex catalyst so as to prepare 2,6-diaminotoluene. By the synthetic method, high-temperature and high-pressure conditions in traditional technologies are avoided; economic cost is reduced, raw materials are simple and easy available, and reaction process is simple; and environmental protection is also considered, and raw materials harmful to the environment are avoided from being used in quantity.