Patent ID: 8299268

Claim:
A compound of formula (I): or a salt thereof; wherein: R 1 is C1-C4 alkyl; R 2 is H or Me; R 3 is —NR 4 R 5 ; R 4 is H, or C1-C4 alkyl; R 5 is H, or C1-C8 alkyl, C1-C8 heteroalkyl, C6-C14 arylalkyl, C6-C14 heteroarylalkyl, arylsulfonyl, trialkylsilyl, or alkoxycarbonyl, each of which may be optionally substituted; or —C(═X)R′ where X is O, S, or NH, and R′ is optionally fluorinated C1-C8 alkyl, C2-C8 alkenyl, C5-C12 aryl, or C6-C14 arylalkyl, each of which may be optionally substituted; R 6 is H, or an arylalkyl, arylsulfonyl, acyl or alkoxycarbonyl; R 7 is H, or halo, —CN, optionally substituted C1-C6 acyl, —COOR 8 , or —C(O)NR 9 2 ; R 8 is H, or C1-C8 alkyl, C2-C8 alkenyl, C5-C6 aryl, C6-C14 arylalkyl, or trialkylsilyl; R 9 is H, or C1-C8 alkyl, C2-C8 alkenyl, C5-C6 aryl, C6-C14 arylalkyl, C6-C14 heteroarylalkyl, —OH, or C1-C4 alkoxy, each of which may be optionally substituted; or two R 9 on the same N can optionally cyclize to form a ring; and Y′ is H or halo, and Y is halo or —OR 10 , where R 10 is H, or is optionally fluorinated alkylsulfonyl or arylsulfonyl.