Abstract: The present invention provides 4-amino-azepan-3-one protease inhibitors and pharmaceutically acceptable salts, hydrates and solvates thereof which inhibit proteases, including cathepsin K, pharmaceutical compositions of such compounds, novel intermediates of such compounds, and methods for treating diseases of excessive bone loss or cartilage or matrix degradation, including osteoporosis; gingival disease including gingivitis and periodontitis; arthritis, more specifically, osteoarthritis and rheumatoid arthritis; Paget's disease; hypercalcemia of malignancy; and metabolic bone disease, comprising inhibiting said bone loss or excessive cartilage or matrix degradation by administering to a patient in need thereof a compound of the present invention.

Abstract: This invention relates to the compound of Formula (I) or a pharmaceutically acceptable salt, hydrate or solvent thereof, which is an inhibitor of cysteine proteases, particularly cathespin K, and is useful in the treatment of diseases in which inhibition of bone loss or of cartilage degradation is a factor