| 摘要 |
PP35781 NOVEL COMPOUNDS A compound of formula (I): (I) where R1 is alkyl, optionally substituted aryl or optionally substituted heterocyclyl; R2 is hydrogen, optionally substituted lower alkyl, lower alkoxy, cycloalkyl, haloalkyl, lower thioalkyl, halo or cyano; or the group R1 is a group of sun formula (i): (i) where q is O or an integer of from 1 to 4 and groups R6 are selected independently from hydroxy, alkyl, alkoxy, alkylcarbonyl, halogen, nitrile, nitro, haloalkyl and haloalkoxy; X is oxygen or sulphur, p is 0 or 1, n is 0 or 1 and m is 1, 2 or 3 provided that when n is 0, p+ m is 2 or 3 and when n is 1, p+ m is 1 or 2; R3 and R4 are independently selected from hydrogen, halo, alkyl or alkoxy or R3 and R4 together with the carbon atom to which they are attached form a carbocyclic ring; and R5 is CN; CO2R7 where R7 is hydrogen, a cation or an esterifying group; a group -CYNR8R9 where Y is oxygen or sulphur and R8 and R9 are independently selected from hydrogen, hydroxy, alkyl or alkoxy or together with the nitrogen atom to which they are attached form a heterocyclic ring; or R8 together with R3 and the group to which it is attached form a heterocyclic ring, or. R5 is a group of sub formula (ii)
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