JPS5682845A - Preparation of fluoran compound - Google Patents
Preparation of fluoran compoundInfo
- Publication number
- JPS5682845A JPS5682845A JP16017879A JP16017879A JPS5682845A JP S5682845 A JPS5682845 A JP S5682845A JP 16017879 A JP16017879 A JP 16017879A JP 16017879 A JP16017879 A JP 16017879A JP S5682845 A JPS5682845 A JP S5682845A
- Authority
- JP
- Japan
- Prior art keywords
- fluoran compound
- lower alkyl
- halogenating
- halogen
- phenyl
- 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
Links
Abstract
PURPOSE: To prepare a fluoran compound having excellent characteristics as a pressure-sensitive and heat-sensitive dye, easily and economically, by halogenating a fluoran compound having a specific structural formula in an inorganic acid or an organic solvent.
CONSTITUTION: The objective fluoran compound can be prepared by halogenating a fluoran compound of formula [R1 and R2 are H, lower alkyl, phenyl, α-naphthylmethyl (the phenyl and the naphthalene nuclei may be substituted with a lower alkyl, halogen, etc.); or R1 and R2 may together form an N-hetero ring residue; R3WR5 are H, lower alkyl, or halogen; R6 is H, lower alkyl, benzyl, etc.; A is benzene ring or naphthalene ring], e.g. 3-diethylamino-6-anilinofluoran, in an inorganic acid (e.g. conc. sulfuric acid) or in an organic solvent (e.g. chloroform). The halogenation is carried out by using pref. equimolar amount of a halogenating agent such as chlorine, bromine, etc. to the fluoran compound.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16017879A JPS5682845A (en) | 1979-12-10 | 1979-12-10 | Preparation of fluoran compound |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16017879A JPS5682845A (en) | 1979-12-10 | 1979-12-10 | Preparation of fluoran compound |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5682845A true JPS5682845A (en) | 1981-07-06 |
Family
ID=15709521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16017879A Pending JPS5682845A (en) | 1979-12-10 | 1979-12-10 | Preparation of fluoran compound |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5682845A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007324078A (en) * | 2006-06-05 | 2007-12-13 | Fujikura Ltd | Illumination type proximity sensor |
| JP2007329090A (en) * | 2006-06-09 | 2007-12-20 | Nec Corp | Input device |
-
1979
- 1979-12-10 JP JP16017879A patent/JPS5682845A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007324078A (en) * | 2006-06-05 | 2007-12-13 | Fujikura Ltd | Illumination type proximity sensor |
| JP2007329090A (en) * | 2006-06-09 | 2007-12-20 | Nec Corp | Input device |
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