Oxoindolizine and oxoindolizinium dyes and processes for...

Details Oxoindolizine and oxoindolizinium dyes and processes for... Oxoindolizine and oxoindolizinium dyes and processes for...

C - Chemistry, Metallurgy

09

B

260/272, 260/272

C09B 57/00 (2006.01) C07D 471/04 (2006.01) C09B 23/00 (2006.01) C09B 69/06 (2006.01) G03C 1/73 (2006.01)

Patent

CA 1211112

-0- OXOINDOLIZINE AND OXOINDOLIZINIUM DYES AND PROCESSES FOR THEIR PREPARATION ABSTRACT OF THE DISCLOSURE Oxoindolizine and oxoindolizinium dyes are novel compounds useful in imaging, such as laser recording and reading. These dyes are formed by (1) the reaction of a cyclopropenone and a pyridine com- pound, (2) by reaction of (a) color-forming couplers with (b) reaction products from the reaction of cyclopropenones with pyridine compounds, or (3) by condensation reactions of indol zinols, indoli- zinones, and indolizinium ions.

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