Alkylated piperazine compounds of Formula I are provided, including stereoisomers, tautomers, and pharmaceutically acceptable salts thereof, useful for inhibiting Btk kinase, and for treating cancer mediated by Btk kinase. Methods of using compounds of Formula I for in vitro, in situ, and in vivo diagnosis, and treatment of cancer in mammalian cells, or associated pathological conditions, are disclosed.
