Sulfur-containing heterocyclic derivative having beta-secretase-inhibiting activity

摘要

Disclosed are: a compound represented by formula (I), a pharmaceutically acceptable salt of the compound, or a solvate of the compound or the pharmaceutically acceptable salt thereof; and others, which can be used as therapeutic agents for diseases induced by the production, secretion and/or deposition of amyloid-&bgr; protein. [In the formula, the ring A represents a carbocyclic group which may have a substituent, or a heterocyclic group which may have a substituent; R