Triazinyl-fluorans as colorless precursors in carbonless...

Details Triazinyl-fluorans as colorless precursors in carbonless... Triazinyl-fluorans as colorless precursors in carbonless...

C - Chemistry, Metallurgy

07

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260/249.1

C07D 493/08 (2006.01) B41M 5/145 (2006.01) B41M 5/327 (2006.01) C07D 493/10 (2006.01)

Patent

CA 1077481

ABSTRACT OF THE DISCLOSURE Fluorans useful as color precursors, particularly in the art of carbonless duplicating are normally colorless and are represented by the structural formula Image wherein R represents non-tertiary alkyl of one to four carbon atoms; R1 and R2 represent hydrogen or non-tertiary alkyl of one to four carbon atoms; R3 and R4 represent chlorine, NH2 or one of the groups -WR5-(lower-alkylene)-N(R6)(R7), -NR5-(lower- alkylene-?(R8)(R9)(R10) An?, -NR5-(lower-alkylene)-OH, -NR5- Image , -NR5-(HSO3-C6H4) or -O-(lower-alkyl- ene)-N(R8)(R9) in which R5, R6 and R7 represent hydrogen or non-tertiary alkyl of one to four carbon atoms; R8 and R9 rep- resent non-tertiary alkyl of one to four carbon atoms; R10 represents non-tertiary alkyl of one to four carbon atoms, benzyl or benzyl substituted in the benzene ring by one or two of halo or non-tertiary alkyl of one to three carbon atoms; and An represents an anion.

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