| abstract |
The present invention relates to a compound of the formula n n n wherein R 1 , R 2 , R 3 and R 4 are as defined above, and pharmaceutically acceptable salts and solvates thereof, that are useful, for example, as matrix metalloproteinase inhibitors. The present invention is also directed to pharmaceutical compositions comprising such compounds and methods of treatment for diseases such as osteoarthritis, rheumatoid arthritis, cancer, osteoporosis, tissue ulceration, restinosis, periodontal disease, inflammation, epidermolysis bullosa, scleritis, stroke, Alzheimer's disease, and the like, characterized by inappropriate matrix metalloproteinase activity. Processes for the synthesis of compounds of formula (I) are also disclosed. |