Development of Environmentally Benign Synthetic Organic Reactions Catalyzed by Water-Soluble Iridium Complexes Using Aqueous Ammonia as a Nitrogen Source

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This study has been carried out to develop environmentally benign synthetic organic reactions in water catalyzed by water-soluble iridium complexes using aqueous ammonia as a nitrogen source. The accomplishments are as follows. (1) New water-soluble iridium complexes have been synthesized. (2) A catalytic system for the synthesis of primary amines by the reaction of aqueous ammonia with alcohols has been developed. (3) A catalytic system for the synthesis of N-heterocycles by the reaction of aqueous ammonia with diols has been developed. (4) Efficient method for the recovery and reuse of the water-soluble iridium catalyst has been developed.