Benzimidazole compounds, its prepn. and uses

This invention provides substituted benzimidazole compounds shown in common formula (I) and their pharmacologically permitted salts. The definitions of R1, R2, R3, R4 and n in common formula (I) are mentioned in the instruction. Pharmacological experiments show that, this kind of compounds and their pharmacologically permitted salts or their solvates or hydrates perform excellent anti-hepatitis B virus (anti-HBV) activities and are especially inhibitory to DNA replication of HBV. They are thus promising as anti-HBV drugs. This invention also provides a method to prepare this kind of compounds.