3-Iodo-3H-pyrazolo[3,4-d]pyrimidin-4-amine acts as a reagent in the discovery and preparation of CHMFL-FLT3-122 as potent and orally available FLT3 kinase inhibitor for FLT3-ITD positive acute myeloid leukemia. Development and preparation of potent and selective Plasmodium falciparum calcium-dependent protein kinase 4 (PfCDPK4) inhibitors that block the transmission of malaria to mosquitoes.