Diltiazem for its calciumchannel blocking activity. The manuscript describes the design, synthesis, and biological testing of Benzothiopyran derivatives (7a–7f). The new compounds maintain some Diltiazem pharmacophores. Benzothiopyran has two pharmacophore: the aromatic benzene ring fused with the heterocyclic thiopyrans ring, and the stereo-chemical centers (alkyl ether). In vitro evaluation of Benzothiopyran