The present invention discloses 5-substituted difluoropiperidine compounds having a capacity to cross the blood-brain barrier; the compound has the structural formula represented by formula (I):The 5-substituted difluoropiperidine compounds, derivatives and pharmaceutically acceptable salts thereof of the present invention have the ability to cross the blood-brain barrier and are capable of acting as a drug characteristic of a protein kinase inhibitor, in particular for the expression of a protein through a vascular endothelial growth factor receptor 2 or SRC kinase family (FYN) and can be used to treat or prevent disorders associated with abnormal protein kinase activity, such as cancer, cancer with brain metastases, primary brain cancer (glioma), glioblastoma, cancer with meningeal metastases, Alzheimer's disease and central nervous system diseases, and the like.
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