We have synthesized and evaluated α, α′-disubstituted phenylacetate derivatives that were designed as T-type calcium channel blockers. Among them, compound 10e (IC50= 8.17±0.48 nM) showed the most potent T-type calcium current blocking activity and higher potency than Mibefradil (IC50= 1.34±0.49 μM). The PK profile and subtype selectivity over L- type calcium channel were satisfied for further animal assay using disease model.