Patent ID: 6743940
Filing Date: 2004-06-01
Classification: C07C

Abstract:
A compound of formula whereinR1 and R2 are each independently of the other C1-C20alkyl; C3-C12cycloalkyl; unsubstituted or C1-C5alkyl-, C3-C12cycloalkyl-, C1-C5alkoxy-, C3-C12cycloalkoxy-, halo-, oxo-, carboxy-, carboxy-, C1-C7alkyl ester-, carboxy-C3-C12cycloalkyl ester-, cyano-, trifluoromethyl-, pentafluoroethyl-, amino-, N,N-mono- or di-C1-C20alkylamino- or nitro- substituted phenyl, phenyl-C1-C5alkyl, naphthyl or naphthyl-C1-C5alkyl, R3 is C1-C20alkyl; or C3-C12cycloalkyl; there not being included compounds of formula (1) wherein a) R1 and R2 are each independently of the other C1-C3alkyl; and b) R1 is methyl; R2 is phenyl; or chloro-substituted phenyl; and R3 is methyl or ethyl.