155846-80-3Relevant academic research and scientific papers
Phthalide compounds, and recording materials using the compounds
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, (2008/06/13)
The invention relates to a phthalide compound of general formula (I), processes for its production, and recording materials utilizing the compound. (wherein R1 and R3 independently represent an alkyl group, a cycloalkyl group or an aralkyl group; R2 and R4 independently represent methyl or phenyl; R5 and R6 independently represent an alkyl group, a cycloalkyl group, an aralkyl group or an aryl group; R7 represents hydrogen, an alkyl group, an alkoxy group or a cyclo-alkoxy group; R5 and R6 may, taken together with the adjacent nitrogen atom, form a heterocyclic group). Recording materials utilizing the phthalide compound of the invention are suited for reading with any OCR equipped with a light source having an emission wavelength within the range of 570-780 nm.
