Histonedeacetylases (HDACs) are a promising target for treating cancer and some other disorders. Herein, based on the structure of our previously reported tetrahydroisoquinoline-based hydroxamicacids, a novel series of tyrosine-based hydroxamicacid derivatives was designed and synthesized as HDACsinhibitors. Compared with tetrahydroisoquinoline-based hydroxamicacids, tyrosine-based hydroxamic