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using triphenylphosphine/Trichloroisocyanuric Acid (TCCA) system

An efficient method for the synthesis of urea and carbamate derivatives from amines and alcohols is described by using triphenylphosphine (PPh3)/Trichloroisocyanuric Acid (TCCA) system. The protocol allows for the preparation of symmetrical, unsymmetrical di, tri-, and tetra-substituted ureas and carbamates and is tolerant of a wide range of functional groups. To optimize the reaction conditions, experimental variables including temperature, the concentration of amine and alcohol, solvent, and reaction time were studied. Satisfactory yields were obtained at the optimized conditions. The present methodology is experimentally simple, mild, and represents a valuable alternative to the existing methods.
Research on the Trichloroisocyanuric Acid (TCCA) process cyanuric acid purity, the amount of alkali, salt time, PH value, chloride slurry was placed on generating nitrogen trichloride, we studied the gas phase and the concentration of nitrogen trichloride explosion relationship, determine the value of the safety limits put forward the corresponding security measures. TCCA hypochlorous acid and isocyanuric acid hydrolysis in water, due to the presence of isocyanurate, so that the state of hypochlorous acid in the water more stable, and therefore exhibit some other chlorine-based germicide different characteristics, this article studied the characteristics of  the application of Trichloroisocyanuric Acid (TCCA).