Patent ID: 7456187

Claim:
A compound of formula wherein R 1 is aryl, heteroaryl, or cycloalkyl, each of which is optionally substituted; R 2 is H, optionally substituted alkyl, nitro, CO 2 R 7 , CONR 4 R 5 or halo; R 3 is H, NR 4 R 5 , NHC(O)R 8 , halo, trifluoromethyl, optionally substituted alkyl, cyano or alkoxy; R 4 and R 5 may be the same or different, and may be H, optionally substituted alkyl, optionally substituted aryl, optionally substituted heteroaryl or optionally substituted cycloalkyl; or R 4 and R 5 may together form a saturated, unsaturated or partially saturated 4 to 7 member ring, wherein said ring may optionally comprise one or more further heteroatoms selected from N, O or S; X is O, S or NR 6 ; R 6 is H or optionally substituted alkyl; R 7 is hydrogen, methyl or ethyl; R 8 is methyl or ethyl; L is (CH 2 ) n , where n is 1, 2 or 3; and Y is aryl, a heterocyclic group, alkyl, alkenyl or cycloalkyl, each of which is optionally substituted; or pharmaceutically acceptable salts thereof; provided that the compound is not 4-diethylamino-5-phenylfuro [2,3-d]pyrimidine.