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The potential of trichloroisocyanuric acid (TCCA) as a chlorination agent

3-Arylselanyl- and 3-arylsulfanylindoles were prepared in EtOAc, by the reaction of indole with the diaryl dichalcogenide–trichloroisocyanuric acid (TCCA) reagent system. The products were efficiently and conveniently obtained, at room temperature and in short reaction times.
The potential of trichloroisocyanuric acid (TCCA) as a chlorination agent for efficient conversion of Si–H functional silanes and siloxanes to the corresponding Si–Cl functional moieties was explored. In comparison to methods using other chlorinating agents, trichloroisocyanuric acid (TCCA) is inexpensive, results in a much faster reaction and produces a high purity product with a conversion that is essentially quantitative. 
In the traditional process, generally used for circulating water to add chlorine to achieve its lower algae and sterilization, add mature technology, widely used in the chemical industry, but because of the chlorine is highly toxic, the average amount stored on site will exceed the critical mass and thus also in accordance with major hazard to manage, which makes items to replace chlorine with low toxicity inevitable. In recent years, many alternative chlorine products, this article by circulating water to add to achieve the trichloroisocyanuric acid (TCCA) chlorine substitution of a detailed analysis.