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Continue to ChatA simple route for the synthesis of 3,3,3 ',3 '-tetramethyl-2,3,3 ',4 '-tetrahydro-1H,1 ' H-[4,9 '-bixanthene]-1,1 '(2 ' H,9 ' H)-dione and its derivatives catalyzed by Mn2 and other transition metal cations - https://avesis.atauni.edu.tr/publication/details/247c7521-ecac-40e6-a232-3fffef3d1f66/a-simple-route-for-the-synthesis-of-3-3-3-3-tetramethyl-2-3-3-4-tetrahydro-1h-1-h-4-9-bixanthene-1-1-2-h-9-h-dione-and-its-derivatives-catalyzed-by-mn2-and-other-transition-metal-cations