and tau protein involved in Alzheimer’sdisease. After initial screening with the help of computational chemistry software and Molegro Virtual Docker, three molecules (T5, T18, and T22) were selected for further synthesis and biologicalevaluation. Next, T5, T18, and T22 were synthesized and evaluated for their acetylcholinesterase and tau hyperphosphorylation inhibition. All the tested compounds had
shown phenothiazines to be potent TLK1B inhibitors. Herein, we report the design and synthesis of a class of phenothiazine molecules and their biological inhibitory effect on hTLK1B/KD through in vitro kinase assays, cellular assays, and in silico studies. We identified a few inhibitors with better inhibition and physio-chemical properties than the reported TLK1B inhibitors using a recombinant human