Sustainable Synthesis of Aryl Pyrano-bis-coumarin and Dibenzo[a,j]xanthene Derivatives Using Organocatalyst Triethanol Ammonium Salt (tris (2-hydroxyl) Ammonium 2-(1,1- dioxido-3-oxobenzo [d]isothiazol-2(3H)-yl) acetate) Under Microwave Irradiation

introduction: In this study, a new organocatalyst triethanol ammonium salt, tris (2-hydroxyl) ammonium 2-(1,1- dioxido-3-oxobenzo [d]isothiazol-2(3H)-yl) acetate, was designed and synthesized. materials and methods: the synthesized salt was used as novel green catalyst for the synthesis of various aryl bis-coumarin (3a-j) and dibenzo[a,j]xanthene (5a-j) derivatives through solvent-free and microwaves irradiation methods. results: The structural characterization of ionic liquid and all synthesized heterocyclic derivatives were confirmed by NMR, IR, and the spectral data were compared with the reported spectral data of the corresponding compound. discussion: Also in this study, different conditions such as solvent, temperature, time and method of synthesis were evaluated to achieve optimal synthesis conditions. conclusion: Green synthesis of various aryl bis-coumarin (3a-j) and dibenzo[a,j]xanthene (5a-j) derivatives through solvent-free and microwaves irradiation methods was described.