BENZOFURANONE, PREPARATION OF THE COMPOUND, HEAT TRANSFER PRINTING SHEET AND DYE DIFFUSION HEAT TRANSFER METHOD

摘要

A benzofuranone of the Formula (1): wherein: R<1> and R<2> are each independently -H or optionally substituted C<5> PI <6><4>-alkyl; R<3> and R4 are each independently -H or optionally substituted C<5> PI 1/4 -alkyl; R5 is selected from -H, -CN, -COOR<1>0 and -COR<1>0, in which R<1>0 is -H or C<5> PI 1/4 -alkyl; R6, R7, R8 and R9 are each independently selected from -H, -NR<1>R<2>, -NO<6>, halogen, optionally substituted C<5> PI 1/4 -alkyl and optionally substituted C<5> PI 1/4 -alkoxy.