Isoxazole moiety in the linker region of HDAC inhibitors adjacent to the Zn-chelating group: Effects on HDAC biology and antiproliferative activity

A series of hydroxamic acid based histone deacetylase inhibitors 6–15, containing an isoxazole moiety adjacent to the Zn-chelating hydroxamic acid, is reported herein. Some of these compounds showed nanomolar activity in the HDAC isoform inhibitory assay and exhibited micro molar inhibitory activity against five pancreatic cancer cell lines.

Graphical abstractThe synthesis, HDAC inhibition, and antiproliferative activity of isoxazole hydroxamate based HDAC inhibitors with varied cap groups (1–10) are reported.Figure optionsDownload full-size imageDownload as PowerPoint slide