Background: One of the problems of using dehumidifiers in the industry, including the gas industry, is their deactivation after several stages of regeneration. In the first part of this thesis, the feasibility of recycling used adsorbents of Parsian Gas Refining Company was tested with different solvents and oxidants. Then infrared spectrum analysis (FT-IR) and BET were used to confirm the success or failure of the adsorbent recycling process. Due to the significant destruction in the absorber's structure, its reduction was only 30% successful. In the second part of the thesis, we have reported new and easy methods for the preparation of carbazolone, pyrrole, and 3-hydroxy-1-indanone derivatives. Carbazolone derivatives were synthesized through the selective activation of carbon-hydrogen bonds and by taking advantage of the reaction between cyclic beta-diketone derivatives and primary arylamines in the presence of copper(II) acetate catalyst and air. Also, polysubstituted pyrroles were synthesized through a three-component and one-pot reaction between beta-diketone derivatives, amines, and different alkynes in the presence of Pd(OAc)2 catalyst, Cu(OAc)2 oxidant, and air. Finally, new derivatives of 3-hydroxy-1-indanone were synthesized using a new strategy based on a new and efficient one-pot pseudo-three-component reaction between phthalic acid derivatives and alkyl lithiums.
Purpose: The purpose of this thesis was to participate in solving an important economic and environmental issue related to the Parsian Gas Refining Company. We intended to investigate the possibility of finding a way to recycle deactivated dehumidifier absorbents of that company by carrying out research and laboratory measures, and then in the second part, we tried to use new and environmentally friendly methods to synthesize valuable carbazolone, pyrrole, and 3-hydroxy-1-indanones. One of the problems of using dehumidifying absorbents is the deactivation of absorbents after several stages of