KR20190087301A - Yellow compound, coloring composition containing the compound, coloring agent for color filter and color filter - Google Patents

Abstract

A purpose of the present invention is to provide: a yellow compound which is excellent in solubility with respect to an organic solvent (such as propylene glycol monomethyl ether (PGME) and the like) and excellent in heat resistance at the time of film forming; a coloring composition comprising the compound; a coloring agent for a color filter comprising the coloring composition; and the color filter using the coloring agent for the color filter, wherein the compound is represented by general formula (1).

Description

TECHNICAL FIELD [0001] The present invention relates to a yellow color compound, a coloring composition containing the compound, a colorant for a color filter, and a color filter,

The present invention relates to a yellow color compound, a coloring composition containing the compound, a coloring agent for a color filter containing the coloring composition, and a color filter using the coloring composition.

Many pigments have been developed so far, and examples thereof include quinophthalone pigments, azo pigments, diketopyrrolopyrrole pigments, and the like (see, for example, Patent Documents 1 to 4). These pigments are used for coloring, for example, when making color filters used in liquid crystal or electroluminescence (EL) display devices. The color filter is manufactured by laminating a colored layer on a light-transmitting substrate such as glass by a dyeing method, a pigment dispersion method, a printing method, an electrodeposition method or the like. The above-mentioned quinophthalone-based pigment is a yellow compound synthesized by condensation of quinaldehyde and phthalic anhydride, and is used as a coloring agent for a color filter due to its sharpness (Patent Document 1, Non-Patent Document 1). However, with the increase in the quality of the display, the performance required for the color filter is increased, and it is necessary to improve the coloring power, brightness and contrast.

Since pigments are generally insoluble in solvents, they are present in the form of fine particles in a color filter containing a resin or the like. For this reason, the color filter using the pigment has a problem in that the transmitted light is reflected and scattered on the surface of the pigment particles in the filter, thereby affecting transparency and color purity, It is known that the contrast ratio is lowered.

A method of using only a dye as a colorant or a method of using a dye and a pigment in combination has been proposed in order to solve the problem of lowering the contrast ratio. Since the dyes are soluble in solvents, the color filters using dyes are expected to have improved contrast, brightness, and the like due to their excellent spectroscopic characteristics, as compared with the case where only the pigment is used as a colorant.

Japanese Patent Publication No. 47-3476 Japanese Laid-Open Patent Publication No. 2012-193318 Japanese Laid-Open Patent Publication No. 2012-12498 Japanese Patent Application Laid-Open No. 2001-220520

 Kunihiro Ichimura, " Process Technology and Chemistry of Cutting-Edge Color Filters, " by Shimushi Publishing Co., Ltd., 2006, p.80

Disclosure of the Invention The present invention has been made in order to solve the above problems, and it is an object of the present invention to improve the solubility of a yellow compound in an organic solvent (propylene glycol monomethyl ether (PGME) or the like), and to provide a coloring agent A coloring composition for a color filter containing the coloring composition, and a color filter using the coloring composition.

The present invention has been achieved as a result of intensive studies in order to achieve the above object, and it is based on the following points.

1. A compound represented by the following general formula (1).

[Chemical Formula 1]

Wherein each of R ¹ to R ⁶ independently represents a hydrogen atom, a hydroxyl group, a halogen atom, a cyano group, a nitro group, -SO ₃ H, -SO ₃ M,

An indanthione group having 9 to 25, preferably 9 to 20 carbon atoms which may have a substituent,

A sulfo group having 1 to 25, preferably 1 to 20 carbon atoms which may have a substituent,

A linear or branched alkyl group having 1 to 25, preferably 1 to 20 carbon atoms which may have a substituent,

A cycloalkyl group having 5 to 25, preferably 5 to 20 carbon atoms which may have a substituent,

A straight chain or branched alkenyl group having 2 to 25, preferably 2 to 20 carbon atoms which may have a substituent,

A linear or branched alkoxy group having 1 to 25, preferably 1 to 20 carbon atoms which may have a substituent,

A cycloalkoxy group having 5 to 25, preferably 5 to 20 carbon atoms which may have a substituent,

An acyl group having 1 to 25, preferably 1 to 20 carbon atoms which may have a substituent,

An aromatic hydrocarbon group having 6 to 25, preferably 6 to 20 carbon atoms which may have a substituent,

A heterocyclic group having 5 to 25, preferably 5 to 20, ring-forming atoms which may have a substituent, or

An aryloxy group having 5 to 25, preferably 5 to 20, ring-forming atoms which may have a substituent,

R ¹ to R ⁶ may form a ring by bonding adjacent groups to each other.

And M represents an alkali metal atom.

Any n number of R ¹ ~ R ⁶ may be substituted by -NR ⁷ R ^8,

R ⁷ and R ⁸ each independently represent a hydrogen atom,

A linear or branched alkyl group having 1 to 25, preferably 1 to 20 carbon atoms which may have a substituent,

A cycloalkyl group having 5 to 25, preferably 5 to 20 carbon atoms which may have a substituent,

A straight chain or branched alkenyl group having 2 to 25, preferably 2 to 20 carbon atoms which may have a substituent,

A cycloalkoxy group having 5 to 25, preferably 5 to 20 carbon atoms which may have a substituent,

An aromatic hydrocarbon group having 6 to 25, preferably 6 to 20 carbon atoms which may have a substituent, or

Represents a heterocyclic group having 5 to 25, preferably 5 to 20, ring-forming atoms which may have a substituent,

R ⁷ and R ⁸ may be bonded to each other to form a ring.

and n represents an integer of 1 to 3.

Z represents 1-position.]

2. A compound represented by the general formula (1) wherein Z is a monovalent group represented by the following general formula (2).

(2)

[Wherein R ⁹ to R ¹² each independently represent a hydrogen atom, a hydroxyl group, a halogen atom, a cyano group, a nitro group, -SO ₃ H, -SO ₃ M,

An indanthione group having 9 to 25, preferably 9 to 20 carbon atoms which may have a substituent,

A sulfo group having 1 to 25, preferably 1 to 20 carbon atoms which may have a substituent,

A linear or branched alkyl group having 1 to 25, preferably 1 to 20 carbon atoms which may have a substituent,

A cycloalkyl group having 5 to 25, preferably 5 to 20 carbon atoms which may have a substituent,

A straight chain or branched alkenyl group having 2 to 25, preferably 2 to 20 carbon atoms which may have a substituent,

A linear or branched alkoxy group having 1 to 25, preferably 1 to 20 carbon atoms which may have a substituent,

A cycloalkoxy group having 5 to 25, preferably 5 to 20 carbon atoms which may have a substituent,

An acyl group having 1 to 25, preferably 1 to 20 carbon atoms which may have a substituent,

An aromatic hydrocarbon group having 6 to 25, preferably 6 to 20 carbon atoms which may have a substituent,

A heterocyclic group having 5 to 25, preferably 5 to 20, ring-forming atoms which may have a substituent, or

An aryloxy group having 5 to 25, preferably 5 to 20, ring-forming atoms which may have a substituent,

R ⁹ to R ¹² may form a ring by bonding adjacent groups to each other.

And M represents an alkali metal atom.

3. A compound represented by the general formula (1) wherein Z is a monovalent group represented by the following general formula (3).

(3)

Wherein each of R ¹³ to R ¹⁸ independently represents a hydrogen atom, a hydroxyl group, a halogen atom, a cyano group, a nitro group, -SO ₃ H, -SO ₃ M,

An indanthione group having 9 to 25, preferably 9 to 20 carbon atoms which may have a substituent,

A sulfo group having 1 to 25, preferably 1 to 20 carbon atoms which may have a substituent,

A linear or branched alkyl group having 1 to 25, preferably 1 to 20 carbon atoms which may have a substituent,

A cycloalkyl group having 5 to 25, preferably 5 to 20 carbon atoms which may have a substituent,

A straight chain or branched alkenyl group having 2 to 25, preferably 2 to 20 carbon atoms which may have a substituent,

A linear or branched alkoxy group having 1 to 25, preferably 1 to 20 carbon atoms which may have a substituent,

A cycloalkoxy group having 5 to 25, preferably 5 to 20 carbon atoms which may have a substituent,

An acyl group having 1 to 25, preferably 1 to 20 carbon atoms which may have a substituent,

An aromatic hydrocarbon group having 6 to 25, preferably 6 to 20 carbon atoms which may have a substituent,

A heterocyclic group having 5 to 25, preferably 5 to 20, ring-forming atoms which may have a substituent, or

An aryloxy group having 5 to 25, preferably 5 to 20, ring-forming atoms which may have a substituent,

R ⁹ to R ¹² may form a ring by bonding adjacent groups to each other.

And M represents an alkali metal atom.

4. A compound represented by the general formula (1), wherein n is 1 or 2 and R ² , R ⁴ or R ⁶ is -NR ⁷ R ⁸ .

5. A compound represented by the general formula (1) wherein R ⁷ and R ⁸ are a linear or branched alkyl group having 2 to 25, preferably 2 to 20 carbon atoms which may have a substituent.

6. A compound having a solubility of 0.1% by weight or more in propylene glycol monomethyl ether (PGME) at 25 占 폚 占 2 占 폚.

7. A compound in which the maximum absorption wavelength in the range of 350 to 700 nm in the solution of the compound is in the range of 370 to 430 nm.

8. A coloring composition comprising the compound.

9. A colorant for a color filter containing the coloring composition.

10. A color filter using the colorant for a color filter.

Compounds of the present invention are superior in solubility to organic solvents such as PGME and are superior in heat resistance at the time of film formation as compared with conventional yellow compounds, The coloring composition is useful as a coloring agent for a color filter.

Hereinafter, embodiments of the present invention will be described in detail. The present invention is not limited to the following embodiments, and various modifications may be made within the scope of the present invention. First, the compound represented by the above general formula (1) will be explained.

In the general formula (1), the moiety represented by the following general formula (1-a) can be represented by "(-NR ⁷ R ⁸ ) _n ". In the general formula (1), "-NR ⁷ R ⁸ " represents that any one of R ¹ to R ⁶ may be bonded, the number of "-NR ⁷ R ⁸ " is n, and n is Represents an integer of 1 to 3. When n is 2 or more, a plurality of R ⁷ and R ^{8 present} may be the same or different.

[Chemical Formula 4]

^Examples of the "halogen atom" represented by R ¹ to R ⁶ in the general formula (1), R ⁹ to R ¹² in the general formula (2), or R ¹³ to R ¹⁸ in the general formula (3) , A fluorine atom, a chlorine atom, a bromine atom, and an iodine atom. As the "halogen atom", a fluorine atom or a chlorine atom is preferable.

In the "indandione group having 9 to 25, preferably 9 to 20 carbon atoms which may have a substituent" represented by R ¹ to R ⁶ in the general formula (1), "the number of carbon atoms is 9 to 25, Preferably an indandione group having 9 to 20 carbon atoms "means a group having the same structure as the group represented by the general formula (2). The "substituent group" in "an indanthione group having 9 to 25 carbon atoms, preferably 9 to 20 carbon atoms which may have a substituent" represented by R ¹ to R ⁶ in the general formula (1) 2), the groups represented by R ⁹ to R ¹² may be the same or different. When the "substituent" includes a carbon atom, the carbon atom is not included in the "number of carbon atoms 9 to 25, preferably 9 to 20".

In the formula ^{(1), R 1 ~ R} 6 represents a "carbon atom that may have a substituent 1 to 25, preferably giving a 1-20 alcohol" can be "a carbon atom in the 1-25, preferably Represents a group represented by "-SO ₃ -R", and R represents a group "a sulfo group having 1 to 25 carbon atoms, preferably 1 to 20 carbon atoms which may have a substituent"Quot; means a " substituent "

In the "linear or branched alkyl group having 1 to 25, preferably 1 to 20 carbon atoms which may have a substituent and represented by R ¹ to R ⁶ " in the general formula (1), "carbon Specific examples of the linear or branched alkyl group having 1 to 25, preferably 1 to 20, atoms in the number of atoms include a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, A straight chain alkyl group such as a methyl group, Branched alkyl groups such as isopropyl group, isobutyl group, s-butyl group, t-butyl group, isooctyl group and 2-ethylhexyl group.

In the "cycloalkyl group having 5 to 25, preferably 5 to 20 carbon atoms which may have a substituent" represented by R ¹ to R ⁶ in the general formula (1), "the number of carbon atoms is 5 to 25, Specific examples of the cycloalkyl group preferably having 5 to 20 carbon atoms include a cycloalkyl group such as a cyclopropyl group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclooctyl group, a cyclononyl group, and a cyclodecyl group .

In the "linear or branched alkenyl group having 2 to 25, preferably 2 to 20 carbon atoms which may have a substituent and represented by R ¹ to R ⁶ " in the general formula (1), " Specific examples of the linear or branched alkenyl group having 2 to 25 carbon atoms, preferably 2 to 20 carbon atoms include vinyl, 1-propenyl, allyl, 1-butenyl, An alkenyl group such as a 1-pentenyl group, a 1-hexenyl group, an isopropenyl group or an isobutenyl group, or a linear or branched alkenyl group having a plurality of these alkenyl groups bonded thereto.

In the "straight-chain or branched alkoxy group having 1 to 25, preferably 1 to 20 carbon atoms which may have a substituent," represented by R ¹ to R ⁶ in the general formula (1) Specific examples of the linear or branched alkoxy group having 1 to 25 carbon atoms, preferably 1 to 20 carbon atoms include a methoxy group, an ethoxy group, a propoxy group, a butoxy group, a pentyloxy group, a hexyloxy group, A straight chain alkoxy group such as a heptyloxy group, an octyloxy group, a nonyloxy group and a decyloxy group; Branched alkoxy groups such as isopropoxy, isobutoxy, s-butoxy, t-butoxy and isooctyloxy groups.

In the "cycloalkoxy group having 5 to 25 carbon atoms, and preferably 5 to 20 carbon atoms which may have a substituent" represented by R ¹ to R ⁶ in the general formula (1), "the number of carbon atoms is from 5 to 25 , Preferably 5 to 20 carbon atoms "specifically includes a cycloalkyl group such as a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclooctyl group, a cyclononyl group, and a cyclodecyl group; 1-adamantyl group, 2-adamantyl group and the like.

In the "acyl group having 1 to 25, preferably 1 to 20 carbon atoms which may have a substituent," represented by R ¹ to R ⁶ in the general formula (1), "the number of carbon atoms is 1 to 25, Specifically, an acyl group having 1 to 20 carbon atoms such as a formyl group, an acetyl group, a propionyl group, an acrylyl group, and a benzoyl group.

In the "aromatic hydrocarbon group having 6 to 25 carbon atoms, preferably 6 to 20 carbon atoms which may have a substituent group" represented by R ¹ to R ⁶ in the general formula (1), "the number of carbon atoms is preferably 6 to 25, Specific examples of the aromatic hydrocarbon group having 6 to 20 carbon atoms include a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, an anthracenyl group (anthryl group), a phenanthryl group, a fluorenyl group, an indenyl group, a pyrenyl group, (The "aromatic hydrocarbon group" in the present invention means an aryl group or a condensed polycyclic aromatic group) such as a tetrahydropyranyl group, a tetrahydropyranyl group, a tetrahydronaphthyl group,

In the "heterocyclic group having 5 to 25, preferably 5 to 20 ring-forming atoms which may have a substituent," represented by R ¹ to R ⁶ in the general formula (1), "number of ring-forming atoms 5 To 25, preferably 5 to 20 carbon atoms "specifically includes a pyridyl group, a pyrimidinyl group, a triazinyl group, an imidazolyl group, a pyrazolyl group, a triazolyl group, a thienyl group, a furyl group A benzothienyl group, a carbazolyl group, an oxazolyl group, a benzoxazolyl group, a benzothiazolyl group, a benzothiazolyl group, a benzothiazolyl group, an imidazolyl group, (Or a heteroaromatic hydrocarbon group) such as a thiazolyl group, a benzothiazolyl group, a quinoxalyl group, a benzoimidazolyl group, a pyrazolyl group, a dibenzofuranyl group, a dibenzothienyl group or a carbovinyl group, .

In the " aryloxy group having 5 to 25, preferably 5 to 20 ring-forming atoms which may have a substituent group " represented by R ¹ to R ⁶ in the general formula (1) To 25, preferably 5 to 20 carbon atoms "specifically includes an aryloxy group such as a phenyloxy group, a biphenylyloxy group, a naphthyloxy group, an anthracenyloxy group, and a phenanthrenyloxy group.

In the formula ^{(1), R 1 ~ R} 6 represents a carbon atom having a "carbon atom having a substituent 1 to 25, preferably an alkyl group of 1 to 20 linear or branched in" or "substituent Quot; substituent " in the "straight-chain or branched alkenyl group having 2 to 25, preferably 2 to 20 carbon atoms" includes a deuterium atom, a hydroxyl group, -SO ₃ ^- , a cyano group, a nitro group, A halogen atom such as a fluorine atom, a chlorine atom, a bromine atom or an iodine atom; A cycloalkyl group having 3 to 19 carbon atoms; A linear or branched alkoxy group having 1 to 19 carbon atoms; A cycloalkoxy group having 3 to 19 carbon atoms or a 1-adamantyloxy group or a 2-adamantyloxy group; An aromatic hydrocarbon group or a condensed polycyclic aromatic group having 6 to 19 carbon atoms; A heterocyclic group having 2 to 19 carbon atoms; An aryloxy group having 6 to 19 carbon atoms; An unsubstituted amino group; A monosubstituted or disubstituted amino group having 1 to 19 carbon atoms; An acyl group having 1 to 19 carbon atoms, and the like. When the " substituent " includes a carbon atom, the carbon atom is the above-mentioned "number of carbon atoms 9 to 25, preferably 9 to 20,""number of carbon atoms 1 to 25, preferably 1 to 20, Is not included in the number of carbon atoms of 5 to 25, preferably 5 to 20, the number of carbon atoms of 2 to 25, preferably 2 to 20, and the number of carbon atoms of 6 to 25, preferably 6 to 20 Do not. These "substituents" may be contained in only one or a plurality of such substituents, and when a plurality of substituents are included, they may be the same or different. These "substituents" may further have the above-exemplified substituents. These substituents may be bonded to each other via a single bond, a substituted or unsubstituted methylene group, an oxygen atom or a sulfur atom to form a ring.

"An indandione group having 9 to 25, preferably 9 to 20 carbon atoms having a substituent group" represented by R ¹ to R ⁶ in the general formula (1), "an indandione group having 5 to 25 carbon atoms having a substituent, A cycloalkyl group preferably having 5 to 20 carbon atoms, a linear or branched alkoxy group having 1 to 25 carbon atoms, preferably 1 to 20 carbon atoms, having a substituent, " , A cycloalkoxy group preferably having 5 to 20 carbon atoms, an acyl group having 1 to 25 carbon atoms, preferably 1 to 20 carbon atoms having a substituent group, an amino group having 6 to 25 carbon atoms, preferably 6 carbon atoms, A heterocyclic group having 5 to 25, preferably 5 to 20, ring-forming atoms having a substituent group "," a heterocyclic group having 5 to 25, preferably 5 to 20, Quot ;, " aryloxy group having 0 to 25 carbon atoms having a substituent Quot; substituent " in the " amino group of 0 to 20 " specifically includes a deuterium atom, a hydroxyl group, -SO ₃ ^- , a cyano group and a nitro group; A halogen atom such as a fluorine atom, a chlorine atom, a bromine atom or an iodine atom; A linear or branched alkyl group having 1 to 19 carbon atoms; A cycloalkyl group having 3 to 19 carbon atoms; A linear or branched alkenyl group having 2 to 19 carbon atoms; A linear or branched alkoxy group having 1 to 19 carbon atoms; A cycloalkoxy group having 3 to 19 carbon atoms or a 1-adamantyloxy group or a 2-adamantyloxy group; An acyl group having 1 to 19 carbon atoms; An aromatic hydrocarbon group or a condensed polycyclic aromatic group having 6 to 19 carbon atoms; A heterocyclic group having 2 to 19 carbon atoms; An aryloxy group having 6 to 19 carbon atoms; An unsubstituted amino group; A monosubstituted or disubstituted amino group having 1 to 19 carbon atoms; And the like. When the " substituent " includes a carbon atom, the carbon atom thereof is the above-mentioned "number of carbon atoms 9 to 25, preferably 9 to 20,""number of carbon atoms 5 to 25, preferably 5 to 20, Is not included in the number of carbon atoms of 1 to 25, preferably 1 to 20, the number of carbon atoms of 6 to 25, preferably 6 to 20, and the number of carbon atoms of 0 to 25, preferably 0 to 20 Do not. These "substituents" may be contained in only one or a plurality of such substituents, and when a plurality of substituents are included, they may be the same or different. These "substituents" may further have the above-exemplified substituents. These substituents may be bonded to each other via a single bond, a substituted or unsubstituted methylene group, an oxygen atom or a sulfur atom to form a ring.

Further, in the above-mentioned various " groups " having a "substituent" represented by R ¹ to R ⁶ in the general formula (1)

Quot; linear or branched alkyl group having 1 to 19 carbon atoms ", "

Quot; cycloalkyl group having 3 to 19 carbon atoms ", "

Quot; linear or branched alkenyl group having 2 to 19 carbon atoms ", "

Quot; linear or branched alkoxy group having 1 to 19 carbon atoms ", "

Quot; cycloalkoxy group having 3 to 19 carbon atoms ", "

An "acyl group having 1 to 19 carbon atoms", "

Aromatic hydrocarbon group or condensed polycyclic aromatic group having 6 to 19 carbon atoms ", "

A "heterocyclic group having 2 to 19 carbon atoms", "

An " aryloxy group having 6 to 19 carbon atoms &

A mono-substituted or a disubstituted amino group having 1 to 19 carbon atoms ", or

Specific examples of the "acyl group having 1 to 19 carbon atoms"

An ethyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, an s- A linear or branched alkyl group having 1 to 19 carbon atoms such as an acyl group, a heptyl group, an octyl group, an isooctyl group, a nonyl group and a decyl group;

A cycloalkyl group having 3 to 19 carbon atoms such as a cyclopropyl group, a cyclopentyl group, a cyclohexyl group, a cyclooctyl group, a cyclononyl group, and a cyclodecyl group;

The number of carbon atoms to which a plurality of these alkenyl groups are bonded is more preferably a number of carbon atoms bonded to the carbon atoms of the carbon atoms of the carbon atoms of the carbon atoms of the carbon atoms of the carbon atoms of the carbon atoms of the carbon atoms of the carbon atoms of the carbon atoms of the carbon atoms, A linear or branched alkenyl group having 2 to 19 carbon atoms;

An alkoxy group, an ethoxy group, a propoxy group, a butoxy group, a pentyloxy group, a hexyloxy group, a heptyloxy group, an octyloxy group, a nonyloxy group, a decyloxy group, an isopropoxy group, an isobutoxy group, , a t-butoxy group, and an iso-octyloxy group; a linear or branched alkoxy group having 1 to 19 carbon atoms;

A cycloalkoxy group having 3 to 19 carbon atoms such as a cyclopropoxy group, a cyclopropoxy group, a cyclopentyloxy group, a cyclohexyloxy group, a cyclononyloxy group, and a cyclodecyloxy group;

An acyl group having 1 to 19 carbon atoms such as a formyl group, an acetyl group, a propionyl group, an acrylyl group, and a benzoyl group;

A phenyl group, a biphenylyl group, a terphenyl group, a naphthyl group, an anthracenyl group (anthryl group), a phenanthryl group, a fluorenyl group, an indenyl group, a pyrenyl group, a perylenyl group, a fluoranthenyl group, An aromatic hydrocarbon group or a condensed polycyclic aromatic group having 6 to 19 carbon atoms;

A thiazolyl group, an isoquinolyl group, a naphthyridinyl group, an isoquinolyl group, a naphthyridyl group, a thiazolyl group, a thienyl group, a thienyl group, An acridinyl group, a phenanthrolinyl group, a benzofuranyl group, a benzothienyl group, an oxazolyl group, an indolyl group, a carbazolyl group, a benzoxazolyl group, a thiazolyl group, a benzothiazolyl group, a quinoxalinyl group, A heterocyclic group having 2 to 19 carbon atoms such as a pyrazolyl group, a dibenzofuranyl group, a dibenzothienyl group and a carbolinyl group;

An aryloxy group having 6 to 19 carbon atoms such as a phenyloxy group, a tolyloxy group, a biphenylyloxy group, a naphthyloxy group, an anthracenyloxy group, and a phenanthrenyloxy group;

A linear or branched alkyl group having 1 to 19 carbon atoms such as a methylamino group, a dimethylamino group, a diethylamino group, an ethylmethylamino group, a methylpropylamino group, a di-t-butylamino group, A mono-substituted or disubstituted amino group having an aromatic hydrocarbon group having 6 to 19 atoms, and the like.

In the general formula (1), adjacent groups of R ¹ to R ⁶ may be bonded to each other via a single bond, a substituted or unsubstituted methylene group, an oxygen atom, or a sulfur atom to form a ring.

In the general formula (1), as R ¹ to R ⁶ ,

A hydrogen atom, a hydroxyl group, a halogen atom, a nitro group,

An indanthione group having 9 to 20 carbon atoms which may have a substituent,

A linear or branched alkyl group having 1 to 20 carbon atoms which may have a substituent,

A linear or branched alkenyl group having 2 to 20 carbon atoms which may have a substituent,

An aromatic hydrocarbon group having 6 to 20 carbon atoms which may have a substituent,

Or -NR ⁷ R ⁸ is preferable, and a hydrogen atom or -NR ⁷ R ⁸ is more preferable.

In the general formula (1), n represents an integer of 1 to 3, preferably 1 or 2. In the general formula (1), R ² , R ⁴ or R ⁶ is preferably -NR ⁷ R ⁸ .

In the general formula (1), R ⁷ or R ⁸ ,

"A linear or branched alkyl group having 1 to 25, preferably 1 to 20 carbon atoms which may have a substituent"

"A cycloalkyl group having 5 to 25 carbon atoms, preferably 5 to 20 carbon atoms, which may have a substituent"

"A straight chain or branched alkenyl group having 2 to 25, preferably 2 to 20 carbon atoms which may have a substituent"

"A cycloalkoxy group having 5 to 25, preferably 5 to 20 carbon atoms which may have a substituent"

"Aromatic hydrocarbon group having 6 to 25, preferably 6 to 20 carbon atoms which may have a substituent" or

As the various " groups " of the "heterocyclic group having 5 to 25, preferably 5 to 20 ring-forming atoms which may have a substituent group"

May be the same as the "groups" represented by R ¹ to R ⁶ in the general formula (1). The "substituent" which R ⁷ or R ⁸ may have may also be the same as the "substituent" for R ¹ to R ⁶ .

As R ⁷ and R ⁸ in the general formula (1), a hydrogen atom,

A linear or branched alkyl group having 1 to 20 carbon atoms which may have a substituent,

An aromatic hydrocarbon group having 6 to 20 carbon atoms which may have a substituent is preferable.

In the general formula (1), Z represents 1 and is preferably a monovalent group represented by the general formula (2) or (3).

In the general formula (1), "-NR ⁷ R ⁸ " represents that any position of R ¹ to R ⁶ may be bonded, but when Z in the general formula (1) -NR ⁷ R ⁸ "may be bonded at any position of R ¹ to R ⁶ , R ⁹ to R ^12, or R ¹³ to R ¹⁸ , and in this case," -NR ⁷ R ⁸ "is n, and n is an integer of 1 to 3. When n is 2 or more, a plurality of R ⁷ and R ^{8 present} may be the same or different.

, "An indanthione group having 9 to 20 carbon atoms which may have a substituent" represented by R ⁹ to R ¹² in the general formula (2) or R ¹³ to R ¹⁸ in the general formula (3)

"A sulfo group having 1 to 25, preferably 1 to 20 carbon atoms which may have a substituent"

"A linear or branched alkyl group having 1 to 25, preferably 1 to 20 carbon atoms which may have a substituent"

"A cycloalkyl group having 5 to 25 carbon atoms, preferably 5 to 20 carbon atoms, which may have a substituent"

"A straight chain or branched alkenyl group having 2 to 25, preferably 2 to 20 carbon atoms which may have a substituent"

"A linear or branched alkoxy group having 1 to 25, preferably 1 to 20 carbon atoms which may have a substituent"

"A cycloalkoxy group having 5 to 25, preferably 5 to 20 carbon atoms which may have a substituent"

"An acyl group having 1 to 25, preferably 1 to 20 carbon atoms which may have a substituent"

Aromatic hydrocarbon group having 6 to 25, preferably 6 to 20 carbon atoms which may have a substituent ", "

"A heterocyclic group having 5 to 25, preferably 5 to 20 ring-forming atoms which may have a substituent" or

Examples of various "groups" in the "aryloxy group having 5 to 25 ring-forming atoms and optionally having 5 to 20 ring-forming atoms which may have a substituent (s)" include groups represented by R ¹ to R ⁶ in the general formula Quot; and " group ". The "substituent" which these "groups" in the general formula (2) or (3) may have may be the same as the "substituent" in the general formula (1).

In the general formulas (2) and (3), R ⁹ to R ¹² and R ¹³ to R ¹⁸ are adjacent to each other through a single bond, a substituted or unsubstituted methylene group, They may be combined to form a ring.

Examples of R ⁹ to R ¹² and R ¹³ to R ^{18 in the} general formulas (2) and (3) include a hydrogen atom, a hydroxyl group, a halogen atom, a nitro group,

An indanthione group having 9 to 20 carbon atoms which may have a substituent,

A linear or branched alkyl group having 1 to 20 carbon atoms which may have a substituent,

A linear or branched alkenyl group having 2 to 20 carbon atoms which may have a substituent,

An aromatic hydrocarbon group having 6 to 20 carbon atoms which may have a substituent,

Or -NR < ⁷ > R < ^{8 &} gt ;.

In the general formula (1), (2) or (3), "M" represents an alkali metal atom, preferably a lithium atom, a sodium atom or a potassium atom, more preferably a lithium atom or a sodium atom, desirable.

In the present invention, specific preferred examples of the compound represented by the general formula (1) are shown below, but are not limited to these compounds. In the following structural formula, some hydrogen atoms are omitted. In addition, even when a stereoisomer is present, its plane structural formula is described.

[Chemical Formula 5]

[Chemical Formula 6]

(7)

[Chemical Formula 8]

[Chemical Formula 9]

[Chemical formula 10]

(11)

[Chemical Formula 12]

[Chemical Formula 13]

[Chemical Formula 14]

[Chemical Formula 15]

[Chemical Formula 16]

[Chemical Formula 17]

[Chemical Formula 18]

[Chemical Formula 19]

[Chemical Formula 20]

The compound of the present invention represented by the general formula (1) can be synthesized by a known method (for example, Patent Document 1). Next, synthesis examples in the case of n = 1, R ² = -NR ⁷ R ⁸ and Z in the general formula (1) are indandione groups represented by the general formula (2).

Chloro-2-methylquinoline derivative having a substituent corresponding thereto and an amine such as H-NR < ⁷ > R < ⁸ > having a substituent corresponding to the substituent, by using a cross- 2-methylquinoline derivatives having ⁷ R < ⁸ > are obtained.

The compound of the present invention represented by the general formula (1) can be obtained by subjecting the obtained 2-methylquinoline derivative and a corresponding phthalic anhydride having a substituent to a dehydration condensation reaction at a suitable solvent and temperature.

In the course of the synthesis of the compound of the present invention, the method of purifying the product includes purification by column chromatography; Adsorption purification by silica gel, activated carbon, activated clay, etc .; Known methods such as recrystallization with a solvent and crystallization. If necessary, these compounds can be identified and analyzed by nuclear magnetic resonance (NMR) spectroscopy, UV-vis absorption spectroscopy (UV-Vis), thermogravimetry-differential thermal analysis (TG-DTA ) Can be performed. These methods can also be used to evaluate the solubility, color and heat resistance of the obtained compound.

The solubility of the compound in the present invention is represented by the solubility, and the solubility is represented by a unit such as " wt% (solvent name, temperature) ", which indicates the ratio of the maximum amount in which a substance can be dissolved in a specific solvent . The solubility is obtained by, for example, mixing a sample with a specific solvent, stirring the solvent at a constant temperature for a predetermined period of time, and measuring the concentration of the prepared saturated solution. The solubility is measured by liquid chromatography (LC) It is also obtained by measuring the concentration.

By performing thermogravimetric-differential thermal analysis (TG-DTA) of the compound of the present invention, the thermal decomposition temperature can be analyzed, and it can be used as an index of heat resistance. In the coloring composition, the pyrolysis temperature of the compound of the dye part is preferably 250 DEG C or higher. When applied to color filters, the higher the thermal decomposition temperature, the better.

A coating film can be prepared by mixing the compound of the present invention with various resin solutions and applying it on a glass substrate. The obtained coating film can be colorimetrically evaluated by colorimetry using a spectroscopic colorimeter to obtain the colorimetric value of the coating film. The CIE L ^* a ^* b ^* colorimetric system is commonly used. Specifically, the color values L ^* , a ^* and b ^* of the film samples can be measured and the heat resistance can be judged from the color difference (? E ^* _ab ) of the color values before and after heating at an appropriate temperature. When applied to a color filter, a color difference at a temperature of around 230 占 폚 can be used as an index of heat resistance. The smaller the value of? E ^* _ab , the smaller the discoloration of the color due to pyrolysis is, so it is preferably 3 or less.

The coloring composition contained in the coloring agent for a color filter needs to be dissolved or dispersed well in the resin and the organic solvent so that the compound contained in these coloring compositions is preferably highly soluble in the organic solvent. Specific examples of the organic solvent include esters such as ethyl acetate and n-butyl acetate; Ethers such as diethyl ether and propylene glycol monomethyl ether (PGME); Ether esters such as propylene glycol monomethyl ether acetate (PGMEA); Ketones such as acetone and cyclohexanone; Alcohols such as methanol and ethanol; Diacetone alcohol (DAA) and the like; Aromatic hydrocarbons such as benzene, toluene and xylene; Amides such as N, N-dimethylformamide (DMF) and N-methylpyrrolidone (NMP); Dimethyl sulfoxide (DMSO) and the like. These solvents may be used alone or in combination of two or more. Among them, the compounds according to the present invention are excellent in solubility in PGME or PGMEA. For example, the solubility (% by weight) (PGME, 25 ± 2 ° C) 0.1% by weight or more, more preferably 1% by weight or more, and particularly preferably 2% by weight or more. In other words, the solubility (% by weight) (solvent PGME, 25 占 2 占 폚) of the compound according to the present invention to PGME is preferably 0.1% by weight or more at any temperature between 23 占 폚 and 27 占 폚, More preferably 1% by weight or more, and particularly preferably 2% by weight or more.

In the compound represented by the general formula (1), it is preferable that the maximum absorption wavelength in the visible light region in the solution, for example, in the range of 350 to 700 nm is in the range of 370 to 430 nm.

The coloring composition of the present invention contains the compound of the present invention represented by the general formula (1), and may contain one kind of compound or two or more kinds of compounds. In the present invention, the structure of the compound is preferably one kind.

The coloring composition of the present invention can be used in combination with other organic components such as surfactants, dispersants, antifoaming agents, leveling agents, additives for mixing in the production of other coloring agents for color filters, A compound or the like may be added. However, the content of these additives in the coloring composition is preferably an appropriate amount, and the solubility of the coloring composition of the present invention in the solvent can be lowered, or the coloring composition can be improved more than necessary, It is preferable that the content ratio is within a range that does not affect the effect of the same kind of additive. These additives can be added at any timing of preparation of the coloring composition.

The coloring agent for a color filter of the present invention contains a coloring composition containing a compound represented by the general formula (1) and a component generally used for producing a color filter. A general color filter is a method in which a liquid prepared by mixing a coloring matter such as a dye or a pigment with a resin component (including a monomer, an oligomer, a binder component, and a resist component) or a solvent is used as a color filter in the case of using a photolithography process, Resin, or the like, and photopolymerizing the resultant with a photomask to prepare a colored pattern of a dye / resin composite film soluble / insoluble in a solvent, washing, and heating. Since the compound of the present invention has excellent solubility and is excellent in dispersibility with the material used for the production of these color filters, it can be mixed with other materials as required and formed into a film to evaluate the heat resistance and the light absorbing property have. Also in the electrodeposition method and the printing method, a coloring pattern can be produced by mixing a coloring matter with a resin or other components. Therefore, specific examples of the coloring agent for a color filter of the present invention include compounds represented by the general formula (1), other dyes such as dyes and pigments, resin components, organic solvents, and other additives such as a photopolymerization initiator . It is also possible to select from these components or to add other components as needed.

When the coloring composition of the present invention is used as a coloring agent for a color filter, it can be used as a yellow color filter, but it can also be mixed with a color filter for coloring red or green. In addition, the coloring composition of the present invention may be used alone, or a known dye such as another dye or pigment may be mixed for adjustment of color tone. For example, basic dyes; Acid dyes; Disperse dyes; Spiron dyes; (Poly) methine series, cyanine series, indigo series, phthalocyanine series, anthraquinone series, acridine series, triarylmethane series, indanthrene series, dioxazine series, dioxazine series, diazo series, quinoline series, stilbene series, , Dyes and pigments such as naphthol AS, benzimidazolone, pyrazolone, perylene, perinone, quinacridone, isoindolinone, xanthene and diketopyrrolopyrrole.

The mixing ratio of the other colorants in the coloring composition of the present invention and the coloring agent for a color filter is preferably 5 to 2000% by weight, more preferably 10 to 1000% by weight, based on the compound represented by the general formula (1). The mixing ratio of the dye component such as dye in the liquid color filter for a color filter is preferably 0.5 to 70% by weight, more preferably 1 to 50% by weight based on the total weight of the colorant.

As the resin component in the coloring composition and the color filter for a color filter of the present invention, any known resin component may be used as long as it has properties necessary for the production method and use of the color filter resin film formed by using them. Examples of the resin include acrylic resin, olefin resin, styrene resin, polyimide resin, urethane resin, polyester resin, epoxy resin, vinyl ether resin, phenol (novolak) resin, other transparent resin, A binder resin, and a photoresist resin. These can be used in appropriate combinations. Copolymers of these resins may be used in combination. The content of the resin in the coloring agent for color filters is preferably 5 to 95% by weight, more preferably 10 to 50% by weight, in the case of a liquid coloring agent.

The coloring composition of the present invention and other additives in the coloring agent for a color filter include components required for polymerization or curing of a resin such as a photopolymerization initiator and a crosslinking agent and the properties of components in a liquid coloring agent for a color filter A surfactant or a dispersing agent necessary for stabilizing the surfactant. All of them may be any known ones for producing color filters and are not particularly limited. The mixing ratio of the total amount of these additives in the total solid content of the coloring agent for a color filter is preferably 5 to 60% by weight, and more preferably 10 to 40% by weight.

Example

Hereinafter, the embodiments of the present invention will be described concretely with reference to Examples, but the present invention is not limited to the following Examples. In addition, the compounds obtained in the synthesis examples were identified by ¹ H-NMR analysis (JNM-ECA-600, manufactured by Nihon Denko KK).

[Synthesis Example 1] Synthesis of Compound (A-1)

To the reaction vessel were added 3.0 g of 4-chloro-2-methylquinoline, 4.4 g of dibutylamine and 0.96 g of p-toluenesulfonic acid monohydrate, and the mixture was stirred at 130 占 폚 for 5 hours. Toluene and water were added to the reaction solution, and the toluene was extracted. The extract was concentrated under reduced pressure and purified by column chromatography (carrier: silica gel, solvent: dichloromethane) to obtain 4-dibutylamino-2-methylquinoline (3.1 g, yield 68%).

Subsequently, 3.1 g of 4-dibutylamino-2-methylquinoline obtained above, 2.6 g of phthalic anhydride, 2.1 g of benzoic acid and 16 ml of 1,2,4-trichlorobenzene were placed in a reaction vessel, Lt; / RTI > After cooling to 25 占 폚, purification was carried out by column chromatography (carrier: silica gel, solvent: dichloromethane) to obtain a yellow powder (3.1 g, yield 68%).

The obtained yellow powder was subjected to NMR measurement, and the following 27 hydrogen signals were detected and identified by the structure of the compound represented by the following formula (A-1).

[Chemical Formula 21]

[Synthesis Example 2] Synthesis of Compound (A-8)

3.0 g of 4-dibutylamino-2-methylquinoline obtained in the same manner as in Synthesis Example 1, 3.3 g of 1,8-naphthalic anhydride, 2.1 g of benzoic acid, 1,2,4-trichlorobenzene 15 ml, and the mixture was stirred at 170 占 폚 for 8 hours. After cooling to 25 캜, the residue was purified by column chromatography (carrier: silica gel, solvent: dichloromethane) to obtain yellow powder (2.2 g, yield 50%).

The obtained yellow powder was subjected to NMR measurement, and the following 29 signals of hydrogen were detected, and the structure of the compound represented by the following formula (A-8) was identified.

[Chemical Formula 22]

[Synthesis Example 3] Synthesis of Compound (A-16)

In the reaction vessel, 13.4 g of 4-dibutylamino-2-methylquinoline, 9.0 g of trimellitic anhydride, 6.0 g of benzoic acid and 67 ml of 1,2,4-trichlorobenzene obtained in the same manner as in Synthesis Example 1 Followed by stirring at 200 ° C for 48 hours. After cooling to 25 캜, toluene and ethanol were added and the mixture was filtered to obtain yellow powder (A-16) (14.6 g, yield 66%).

The obtained yellow dye was subjected to NMR measurement, and the following 27 hydrogen signals were detected, and the structure of the compound represented by the following formula (A-16) was identified.

(23)

[Example 1]

The solubility (% by weight) (solvent PGME, 25 +/- 2 DEG C) of the compound (A-1) obtained in Synthesis Example 1 relative to the PGME solvent at room temperature was measured. The solubility was evaluated in the following four steps based on the measured solubility values. The results are shown in Table 1.

&Quot;? &Quot;: solubility of not less than 2% by weight

&Quot;? &Quot;: 1 to 2 wt%

"Δ": 0.1 to 1 wt%

&Quot; x ": less than 0.1% by weight

5.0 g of a 2% by weight DMF solution of a copolymer of methacrylic acid and acrylic ester and 20 mg of the compound (A-1) obtained in Synthesis Example 1 were placed in a sample bottle and mixed by stirring for 30 minutes. The obtained colored resin solution was coated on a glass substrate and heated at 100 占 폚 for 2 minutes to form a film. For the obtained film, the color value was measured using a spectroscopic colorimeter (CM-5, manufactured by Konica Minolta Co., Ltd.). Thereafter, the sample was heated at 230 DEG C for 20 minutes to similarly measure the color value. The color difference (? E ^* _ab ) of the color value before and after heating at 230 占 폚 is shown in the following three evaluation results as indexes of heat resistance.

&Quot; o ": DELTA E ^* _ab < 3.0

?:? E ^* _ab = 3.0 to 10.0

"×": ΔE ^* _ab > 10.0

[Example 2 and Example 3]

Except that the compound (A-8) and the compound (A-16) obtained in Synthesis Example 2 and Synthesis Example 3 were used in place of the compound (A-1) (Solvent PGME, 25 +/- 2 DEG C) was measured for the solvent, and the color difference (DELTA E ^* _ab ) of the color value before and after heating at 230 DEG C was measured on the film formed and evaluated. The results are collectively shown in Table 1.

[Comparative Example 1]

Except that CI Solvent Yellow 33 which is a conventional coloring matter compound represented by the following formula (B-1), which is not belonging to the present invention, was used in place of the compound (A-1) (Solvent PGME, 25 +/- 2 DEG C) was measured for the solvent, and the color difference (DELTA E ^* _ab ) of the color value before and after heating at 230 DEG C was measured on the film formed and evaluated. The results are collectively shown in Table 1.

≪ EMI ID =

As shown in Table 1, the compounds of the examples of the present invention exhibited high solubility in PGME and high heat resistance at the time of film formation, and thus the coloring composition containing the compound of the present invention had problems as a coloring agent for a color filter none. The solubility of the compound of Example 1 in PGME is more than twice the solubility of the compound of Comparative Example 1 and has a higher heat resistance than that of Comparative Example 1 at the time of film formation and is useful as a coloring agent for a color filter .

The coloring composition containing the compound (yellow compound) according to the present invention is excellent in solubility in an organic solvent (such as PGME) and is excellent in heat resistance at the time of film formation, and therefore is useful as a coloring agent for a color filter.

Claims (10)

A compound represented by the following general formula (1).
[Chemical Formula 1]

Wherein each of R ¹ to R ⁶ independently represents a hydrogen atom, a hydroxyl group, a halogen atom, a cyano group, a nitro group, -SO ₃ H, -SO ₃ M,
An indanthione group having 9 to 25 carbon atoms which may have a substituent,
A sulfo group having 1 to 25 carbon atoms which may have a substituent,
A linear or branched alkyl group having 1 to 25 carbon atoms which may have a substituent,
A cycloalkyl group having 5 to 25 carbon atoms which may have a substituent,
A linear or branched alkenyl group having 2 to 25 carbon atoms which may have a substituent,
A linear or branched alkoxy group having 1 to 25 carbon atoms which may have a substituent,
A cycloalkoxy group having 5 to 25 carbon atoms which may have a substituent,
An acyl group having 1 to 25 carbon atoms which may have a substituent,
An aromatic hydrocarbon group having 6 to 25 carbon atoms which may have a substituent,
A heterocyclic group having 5 to 25 ring-forming atoms which may have a substituent, or
An aryloxy group having 5 to 25 ring-forming atoms which may have a substituent,
R ¹ to R ⁶ may form a ring by bonding adjacent groups to each other.
And M represents an alkali metal atom.
Any n number of R ¹ ~ R ⁶ may be substituted by -NR ⁷ R ^8,
R ⁷ and R ⁸ each independently represent a hydrogen atom,
A linear or branched alkyl group having 1 to 25 carbon atoms which may have a substituent,
A cycloalkyl group having 5 to 25 carbon atoms which may have a substituent,
A linear or branched alkenyl group having 2 to 25 carbon atoms which may have a substituent,
A cycloalkoxy group having 5 to 25 carbon atoms which may have a substituent,
An aromatic hydrocarbon group having 6 to 25 carbon atoms which may have a substituent, or
A heterocyclic group having 5 to 25 ring-forming atoms which may have a substituent,
R ⁷ and R ⁸ may be bonded to each other to form a ring.
and n represents an integer of 1 to 3.
Z represents 1-position.] The method according to claim 1,
, Wherein Z is a monovalent group represented by the following general formula (2) in the general formula (1).
(2)

[Wherein R ⁹ to R ¹² each independently represent a hydrogen atom, a hydroxyl group, a halogen atom, a cyano group, a nitro group, -SO ₃ H, -SO ₃ M,
An indanthione group having 9 to 25 carbon atoms which may have a substituent,
A sulfo group having 1 to 25 carbon atoms which may have a substituent,
A linear or branched alkyl group having 1 to 25 carbon atoms which may have a substituent,
A cycloalkyl group having 5 to 25 carbon atoms which may have a substituent,
A linear or branched alkenyl group having 2 to 25 carbon atoms which may have a substituent,
A linear or branched alkoxy group having 1 to 25 carbon atoms which may have a substituent,
A cycloalkoxy group having 5 to 25 carbon atoms which may have a substituent,
An acyl group having 1 to 25 carbon atoms which may have a substituent,
An aromatic hydrocarbon group having 6 to 25 carbon atoms which may have a substituent,
A heterocyclic group having 5 to 25 ring-forming atoms which may have a substituent, or
An aryloxy group having 5 to 25 ring-forming atoms which may have a substituent,
R ⁹ to R ¹² may form a ring by bonding adjacent groups to each other.
And M represents an alkali metal atom. The method according to claim 1,
In the above general formula (1), Z is a monovalent group represented by the following general formula (3).
(3)

Wherein each of R ¹³ to R ¹⁸ independently represents a hydrogen atom, a hydroxyl group, a halogen atom, a cyano group, a nitro group, -SO ₃ H, -SO ₃ M,
An indanthione group having 9 to 25 carbon atoms which may have a substituent,
A sulfo group having 1 to 25 carbon atoms which may have a substituent,
A linear or branched alkyl group having 1 to 25 carbon atoms which may have a substituent,
A cycloalkyl group having 5 to 25 carbon atoms which may have a substituent,
A linear or branched alkenyl group having 2 to 25 carbon atoms which may have a substituent,
A linear or branched alkoxy group having 1 to 25 carbon atoms which may have a substituent,
A cycloalkoxy group having 5 to 25 carbon atoms which may have a substituent,
An acyl group having 1 to 25 carbon atoms which may have a substituent,
An aromatic hydrocarbon group having 6 to 25 carbon atoms which may have a substituent,
A heterocyclic group having 5 to 25 ring-forming atoms which may have a substituent, or
An aryloxy group having 5 to 25 ring-forming atoms which may have a substituent,
R ⁹ to R ¹² may form a ring by bonding adjacent groups to each other.
And M represents an alkali metal atom. 4. The method according to any one of claims 1 to 3,
In the above general formula (1), n is 1 or 2, and R ² , R ⁴ or R ⁶ is -NR ⁷ R ⁸ . 5. The method according to any one of claims 1 to 4,
Wherein in the general formula (1), wherein R ⁷ and R ⁸ is the number of carbon atoms which may have a substituent, a linear or branched alkyl group of 2 to 25, compound. 6. The method according to any one of claims 1 to 5,
Wherein the solubility of the compound in propylene glycol monomethyl ether (PGME) at 25 占 폚 占 2 占 폚 is 0.1% by weight or more. 7. The method according to any one of claims 1 to 6,
Wherein a maximum absorption wavelength in the range of 350 to 700 nm in the solution of said compound is in the range of 370 to 430 nm. A coloring composition comprising the compound according to any one of claims 1 to 7. 9. A colorant for a color filter comprising the coloring composition according to claim 8. A color filter using the coloring agent for a color filter according to claim 9.