摘要 |
This invention relates to a method of treatment for osteoarthritis involving inhibitors of aggrecanase that demonstrate IC<SUB>50</SUB>s of less than 20 nM and demonstrate differential potency against matrix metalloproteinases (MMPs) and a disintegrin and metalloproteinases (ADAMs or reprolysins). This invention also relates to compounds, methods of treatment and composition of Formula I: or a therapeutically acceptable salt thereof, wherein X is carbon or nitrogen; R<SUP>1 </SUP>and R<SUP>2 </SUP>are independently selected from the group consisting of hydrogen, hydroxy, and methyl, wherein at least one of R<SUP>1 </SUP>and R<SUP>2 </SUP>is methyl; R<SUP>3 </SUP>and R<SUP>4 </SUP>are independently selected from the group consisting of hydrogen, hydroxy, and methyl, or R<SUP>3 </SUP>and R<SUP>4 </SUP>may be taken together to form a carbonyl group; and R<SUP>5 </SUP>and R<SUP>6 </SUP>are independent substituents in the ortho, meta, or para positions and are independently selected from the group consisting of hydrogen, halogen, cyano, methyl, and ethyl; with the provisos: when X is carbon, then R<SUP>7 </SUP>and R<SUP>8 </SUP>are both hydrogen and at least one of R<SUP>1</SUP>, R<SUP>2</SUP>, R<SUP>3</SUP>, and R<SUP>4 </SUP>is hydroxy; when X is carbon and R<SUP>5 </SUP>is para-halo, then at least one of R<SUP>6</SUP>, R<SUP>3</SUP>, and R<SUP>4 </SUP>is not hydrogen; when X is nitrogen, then R<SUP>8 </SUP>is not present and R<SUP>7 </SUP>is hydrogen or a group of the formula: wherein, Y is -CH<SUB>2</SUB>-NH<SUB>2 </SUB>or -NH-CH<SUB>3</SUB>; and when X is nitrogen and R<SUP>7 </SUP>is H, then R<SUP>3 </SUP>and R<SUP>4 </SUP>are taken together to form a carbonyl group.
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