Abstract: The present invention pertains to the field of chemical medicine, particularly to 4-substituted coumarin derivatives and preparation methods and applications thereof. The invention provides 4-substituted coumarin derivatives with a structural formula as shown in Formula I. The invention also provides preparation methods and applications for the above 4-substituted coumarin derivatives. The compounds provided in the invention have strong anti-tumor activity with IC50 for plural tumor cell lines between 0.01-5 nM, and it also performs better to inhibit microtubule polymerization and has diversified biological activities and low toxicity, providing new options for drug-sensitive and drug-resistant tumor cells.

Abstract: The present invention relates to the field of the chemical medicines, and in particular, to purinyl-N-hydroxyl pyrimidine formamide derivatives, a preparation method therefor and a use thereof. The present invention provides a purinyl-N-hydroxyl pyrimidine formamide derivative having a structure represented by formula (I). The invention also provides a method for preparing said purinyl-N-hydroxyl pyrimidine formamide derivative and a use thereof. Purinyl-N-hydroxyl pyrimidine formamide derivative provided in the invention can be not only a PI3K and HDAC double-functional target kinase inhibitor, but also a PI3K or HDAC single target kinase inhibitor, thus providing new choice for preparing multi-target inhibitors.