Researchers at Rheinisch-Westfaelische Technische Hochschule Aachen University and University of Arizona have synthesized proteolysis targeting chimera (PROTAC) compounds comprising an E3 ubiquitin ligase binding moiety covalently linked to a DYRK1A and/or DYRK1B and/or DYRK2 and/or DYRK3 and/or CLK1 and/or CLK2 and/or CLK3 and/or CLK4 and/or HASPIN targeting moiety through a linker reported to be useful for the treatment of cancer, viral infection, diabetes, inflammatory disorders, Alzheimer’s, Parkinson’s, Huntington’s and autoimmune diseases, among others.