The present invention relates to an N-substituted benzothiophenesulfonamide derivative or a pharmaceutically acceptable salt thereof and applications thereof. Furthermore, it provides an agent for preventing or treating cardiac or circulatory disease and so on caused by abnormal increase of production of angiotensin II or endothelin I based on chymase activity, or by activation of mast cell, and an agent for preventing adhesion after surgery, wherein the agent has a selective inhibitory action on chymase.
The photochemical behavior of differently substituted N‐arylsulfonimides was investigated. Homolysis of the S−N bond took place as the exclusive path from the singlet state to afford both N‐arylsulfonamides and photo‐Fries adducts, the amount of which depended on reaction conditions and aromatic substituents. Sulfinic and sulfonic acids were released upon irradiation under deaerated and oxygenated