Patent ID: 7521465

Claim:
Diphenyl ether compounds of the formula (I) their tautomeric forms, their stereoisomers, their pharmaceutically acceptable salts, their pharmaceutically acceptable solvates, wherein ---- represents an optional bond; W represents O or S; Z represents O or S; G represents O or S; R 1 is selected from the group consisting of hydrogen, substituted and unsubstituted (C 1 -C 20 ) alkyl, (C 2 -C 20 ) alkenyl, —CH 2 COOR, (C 5 -C 14 ) aryl and a counter ion, wherein R is selected from the group consisting of H and a (C 1 -C 6 ) alkyl; R 2 , R 3 , R 4 and R 5 are independently selected from the group consisting of hydrogen, halo, hydroxyl, nitro, cyano, formyl, amino, linear and branched, substituted and unsubstituted (C 1 -C 20 ) alkyl, and substituted and unsubstituted (C 1 -C 20 ) alkoxy; R 6 and R 7 are independently selected from the group consisting of H, COR 12 , substituted and unsubstituted (C 1 -C 20 ) alkyl, (C 2 -C 20 ) alkenyl, (C 5 -C 14 ) aryl, (C 1 -C 13 ) heteroaryl and (C 1 -C 11 ) heterocyclyl; where R 12 is selected from the group consisting of H, substituted and unsubstituted (C 1 -C 20 ) alkyl,(C 2 -C 20 ) alkenyl, (C 5 -C 14 ) aryl, (C 2 -C 20 ) alkenyloxy, (C 5 -C 14 ) aryloxy, (C 1 -C 20 ) alkoxy and (C 6 -C 34 ) aralkoxy; R 8 represents OR 13 or NR 14 R 15 ; where R 13 is selected from the group consisting of hydrogen, substituted and unsubstituted (C 1 -C 20 ) alkyl, (C 2 -C 20 ) alkenyl, (C 5 -C 14 ) aryl, (C 6 -C 34 ) aralkyl, (C 1 -C 13 ) heteroaryl, and a counter ion; and where R 14 and R 15 are independently selected from the group consisting of H, substituted and unsubstituted (C 1 -C 20 ) alkyl, (C 2 -C 20 ) alkenyl and (C 5 -C 14 ) aryl; and n=1.