JPS55137163A - Fluoran compound, preparing the same, and copy paper using the same - Google Patents

Fluoran compound, preparing the same, and copy paper using the same

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Publication number
JPS55137163A
JPS55137163A JP4475679A JP4475679A JPS55137163A JP S55137163 A JPS55137163 A JP S55137163A JP 4475679 A JP4475679 A JP 4475679A JP 4475679 A JP4475679 A JP 4475679A JP S55137163 A JPS55137163 A JP S55137163A
Authority
JP
Japan
Prior art keywords
cpd
formula
same
fluoran
derivative
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP4475679A
Other languages
Japanese (ja)
Inventor
Takashi Akamatsu
Yukio Kuwabara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Chemical Co Ltd
Original Assignee
Sumitomo Chemical Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Chemical Co Ltd filed Critical Sumitomo Chemical Co Ltd
Priority to JP4475679A priority Critical patent/JPS55137163A/en
Publication of JPS55137163A publication Critical patent/JPS55137163A/en
Pending legal-status Critical Current

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Abstract

NEW MATERIAL:Fluoran represented by the formula I (R1, R2 are H, lower alkyl, cycloalkyl, benzyl, phenyl, methyl-substituted phenyl; R3W6 are H, methyl).
USE: Electron doner coupler for pressure-sensitive or heat-sensitive copy paper.
PREPARATION: An m-aminophenol derivative and naphthalene-2,3-dicarboxylic anhydride are condensed by dehydration to provide the formula II cpd. of 2-(4- amino-2-hydroxy)benzoylnaphthalene-3-carboxylic acid derivative, which is reacted with the formula III cpd. of a diphenylamine derivative at 0W100°C for several to several tens of hours in the presence of dehydration-condensation agent, such as sulfuric acid or boron trifuoride. The product is poured into ice water, and produced precipitate is filtered and neutralized with alkali to provide a colored crystal, which is filtered out, dried, and recrystallized to provide a fluoran cpd. of the formula (I). This cpd. is itself colorless, but develops black color in contact with an acidic material and, as such, is a coloring material excellent in resistance to light and water.
COPYRIGHT: (C)1980,JPO&Japio
JP4475679A 1979-04-11 1979-04-11 Fluoran compound, preparing the same, and copy paper using the same Pending JPS55137163A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4475679A JPS55137163A (en) 1979-04-11 1979-04-11 Fluoran compound, preparing the same, and copy paper using the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4475679A JPS55137163A (en) 1979-04-11 1979-04-11 Fluoran compound, preparing the same, and copy paper using the same

Publications (1)

Publication Number Publication Date
JPS55137163A true JPS55137163A (en) 1980-10-25

Family

ID=12700269

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4475679A Pending JPS55137163A (en) 1979-04-11 1979-04-11 Fluoran compound, preparing the same, and copy paper using the same

Country Status (1)

Country Link
JP (1) JPS55137163A (en)

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