Development of substituted 7-phenyl-4-aminobenzothieno[3,2-d] pyrimidines as potent LIMK1 inhibitors

7-Phenyl-4-aminobenzothieno[3,2-d]pyrimidines were previously reported to exhibit moderate LIMK1 inhibition. Further exploration of SAR around the 7-phenyl moiety has led to the development of a lead series with an increased potency for LIMK1. Evaluation of physicochemical and ADME properties, and off-target kinase screens has seen this novel series emerge as a promising platform for a set of tool compounds for evaluating LIMK as a therapeutic target.