Patent ID: 7968535

Claim:
A compound of formula (Ib) or (Ic) wherein R1 and R2 are independently H, —C 1 -C 6 alkyl, optionally substituted, or —CO—C 1 -C 6 alkyl, optionally substituted, wherein the substituents are independently one or more of halo, CN, OH, O—C 1 -C 6 alkyl; COOH, COO—C 1 -C 6 alkyl, —CONH 2 , —CONH(C 1 -C 6 )alkyl, —CON(C 1 -C 6 alkyl) 2 , aryl, heteroaryl that is benzofuranyl, furyl, thienyl, benzothienyl, thiazol, imidazolyl, oxazolyl, oxadiazolyl, thiadiazolyl, benzothiazolyl, triazolyl, tetrazolyl, isoxazolyl, isothiazolyl, pyrrolyl, pyranyl, tetrahydropyranyl, pyrazolyl, pyridyl, pyrimidinyl, quinolinyl, isoquinolynyl, purinyl, carbazolyl, benzoxazolyl, benzamidazolyl, indolyl, isoindolyl, pyrazinyl, diazinyl, tetrazinyl or tetrazolyl, or polyoxyethylenyl or combinations thereof; each R3 and R4 is independently C 1 -C 6 alkyl, —C 2 -C 6 alkenyl; —C 2 -C 6 alkynyl; —C 3 -C 10 cycloalkyl, —C 3 -C 10 heterocyclyl, that is mono- or polycyclic saturated or unsaturated heterocyclyl groups with 1 to 4 hetero atoms selected from N, S and O, with the remainder of the ring atoms being carbon atoms and having a total number of ring atoms of 3 to 10, aryl with 6 to 10 carbon atoms, heteroaryl that is benzofuranyl, furyl, thienyl, benzothienyl, thiazol, imidazolyl, oxazolyl, oxadiazolyl, thiadiazolyl, benzothiazolyl, triazolyl, tetrazolyl, isoxazolyl, isothiazolyl, pyrrolyl, pyranyl, tetrahydropyranyl, pyrazolyl, pyridyl, pyrimidinyl, quinolinyl, isoquinolynyl, purinyl, carbazolyl, benzoxazolyl, benzamidazolyl, indolyl, isoindolyl, pyrazinyl, diazinyl, tetrazinyl or tetrazolyl, each optionally substituted; halo, —NO 2 , —CN, —OR1; —COOR1 or —NR1R2; wherein R1 and R2 are as defined above; and wherein alkyl, alkenyl or alkynyl is optionally substituted with one or more of halo, —NO 2 , —CN, —OR1, COOR1, —OCOR1, —NR1R2, NR1COR2, —NR1OCOR2, —NR1CONR1R2, —SR1, SOR1, —SO 2 R1, —SONR1R2, —SO 2 NR1R2 or —NR1SO 2 NR1NR2; or combinations thereof, wherein R1 and R2 are as defined above; wherein cycloalkyl, heterocyclyl, aryl or heteroaryl is optionally substituted with one or more of C 1 -C 6 alkyl, halo, —NO 2 , —CN, —OR1, COOR1, —OCOR1, —NR1R2, NR1COR2, —NR1OCOR2, —NR1CONR1R2, —SR1, SOR1, —SO 2 R1, —SONR1R2, SO 2 NR1R2 or —NR1SO 2 NR1NR2; or combinations thereof, wherein R1 and R2 are as defined above; n =0-3.