JP5927875B2 - Amine compounds and uses thereof - Google Patents
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Description
本発明は、新規なアミン化合物及びそれを用いた有機EL素子に関するものである。 The present invention relates to a novel amine compound and an organic EL device using the same.
有機EL素子は、有機薄膜を1対の電極で狭持した面発光型素子であり、薄型軽量、高視野角、高速応答性といった特徴を有し、各種表示素子への応用が期待されている。また最近では、携帯電話のディスプレイ等、一部実用化も始まっている。有機EL素子とは、陽極から注入された正孔と、陰極から注入された電子とが発光層で再結合する際に発する光を利用した素子であり、その構造は正孔輸送層、発光層、電子輸送層等を積層した多層積層型が主流である。ここで、正孔輸送層や電子輸送層といった電荷輸送層は、それ自体は発光するわけではないが、発光層への電荷注入を容易にし、また、発光層に注入された電荷や発光層で生成した励起子のエネルギーを閉じ込めるといった役割を果たしている。
従って、電荷輸送層は有機EL素子の低駆動電圧化及び発光効率を向上させる上で非常に重要である。
An organic EL element is a surface-emitting element in which an organic thin film is held between a pair of electrodes, and has features such as a thin and light weight, a high viewing angle, and a high-speed response, and is expected to be applied to various display elements. . Recently, some practical applications such as mobile phone displays have begun. An organic EL element is an element that utilizes light emitted when holes injected from an anode and electrons injected from a cathode are recombined in a light emitting layer, and has a structure of a hole transport layer, a light emitting layer A multi-layer laminate type in which an electron transport layer and the like are laminated is the mainstream. Here, the charge transport layer such as the hole transport layer and the electron transport layer does not emit light by itself, but facilitates the injection of charges into the light emitting layer, and the charge injected into the light emitting layer or the light emitting layer. It plays the role of confining the energy of the generated excitons.
Therefore, the charge transport layer is very important for lowering the driving voltage and improving the light emission efficiency of the organic EL element.
正孔輸送材料には、適当なイオン化ポテンシャルと正孔輸送能を有するアミン化合物が用いられ、例えば、4,4’−ビス[N−(1−ナフチル)−N−フェニル]ビフェニル(以下、NPDと略す)がよく知られている。しかしながら、NPDを正孔輸送層に用いた素子の駆動電圧、発光効率及び耐久性は十分ではなく、新しい材料の開発が求められている。さらに、近年では発光層に燐光発光材料を用いた有機EL素子の開発も進められており、燐光発光を用いた素子では、三重項準位が高い正孔輸送材料が必要とされている。三重項準位という点からもNPDは十分ではなく、例えば、緑色の発光を有する燐光発光材料とNPDを組み合わせた有機EL素子では、発光効率が低下することが報告されている(例えば、非特許文献1参照)。 As the hole transport material, an amine compound having an appropriate ionization potential and hole transport ability is used. For example, 4,4′-bis [N- (1-naphthyl) -N-phenyl] biphenyl (hereinafter referred to as NPD). Is abbreviated). However, the driving voltage, light emission efficiency and durability of an element using NPD for the hole transport layer are not sufficient, and development of new materials is required. Furthermore, in recent years, an organic EL element using a phosphorescent material for a light emitting layer has been developed, and a hole transport material having a high triplet level is required for an element using phosphorescent light emission. NPD is not sufficient from the point of triplet level, and for example, it has been reported that the organic EL element in which a phosphorescent material having green light emission and NPD are combined reduces the luminous efficiency (for example, non-patent Reference 1).
このような背景から、最近では分子内にカルバゾール環を導入したアミン化合物が報告されている。カルバゾール環を導入したアミン化合物は、NPDと比較して高い三重項準位を有すると共に、正孔輸送性に優れることから有用な分子骨格であるが、これまでに報告されている化合物の多くは、カルバゾール環の3位にアミノ基が導入された3−アミノカルバゾール化合物である(例えば、特許文献1,2参照)。カルバゾール環の3位は、電子ドナー性である窒素原子のパラ位となるため、3位に置換されたアミノ基はカルバゾール環の窒素原子によって活性化されることになる。即ち、3−アミノカルバゾール化合
物のイオン化ポテンシャルは、通常のアミン化合物と比較して低くなってしまう。従って、これまでに報告されている3−アミノカルバゾール化合物を正孔輸送層に用いた場合、発光層への正孔注入障壁が大きくなり、有機EL素子の駆動電圧が高くなるという問題があった。
Against this background, recently, amine compounds having a carbazole ring introduced in the molecule have been reported. An amine compound having a carbazole ring introduced is a useful molecular skeleton because it has a higher triplet level than NPD and is excellent in hole transportability, but many of the compounds reported so far are A 3-aminocarbazole compound in which an amino group is introduced at the 3-position of the carbazole ring (see, for example, Patent Documents 1 and 2). Since the 3-position of the carbazole ring is the para-position of the nitrogen atom that is an electron donor property, the amino group substituted at the 3-position is activated by the nitrogen atom of the carbazole ring. That is, the ionization potential of the 3-aminocarbazole compound is lower than that of a normal amine compound. Therefore, when the 3-aminocarbazole compounds reported so far are used for the hole transport layer, there is a problem that the hole injection barrier to the light emitting layer is increased and the driving voltage of the organic EL element is increased. .
上記の背景から、アミノ基はカルバゾール環の2位に結合した方が適切なイオン化ポテンシャルとなる可能性があった。カルバゾール環の2位がアミノ基で置換された化合物については、2−ジトリルアミノカルバゾール類が電子写真感光体における電荷輸送材料として例示されている(例えば、特許文献3参照)。しかしながら、例示されている化合物はガラス転移温度が低く、有機EL素子に使用した場合、高温駆動時の耐久性に問題があった。また、有機電子デバイス用の材料として、7−フェニル−2−アミノカルバゾール化合物も開示されている(例えば、特許文献4参照)。しかし、アミノ基のパラ位であるカルバゾール環の7位にフェニル基が置換した特許文献4に記載の化合物は、パイ電子の共役が広がるため、分子のエネルギーギャップが小さく、また、三重項準位も低い。従って、緑色発光を有する燐光発光材料と組み合わせた素子では、十分な発光効率を得ること
ができない。
From the above background, there is a possibility that the amino group has an appropriate ionization potential when bonded to the 2-position of the carbazole ring. With respect to compounds in which the 2-position of the carbazole ring is substituted with an amino group, 2-ditolylaminocarbazoles are exemplified as charge transport materials in electrophotographic photoreceptors (see, for example, Patent Document 3). However, the exemplified compounds have a low glass transition temperature, and when used in an organic EL device, there is a problem in durability at high temperature driving. In addition, 7-phenyl-2-aminocarbazole compounds are also disclosed as materials for organic electronic devices (see, for example, Patent Document 4). However, the compound described in Patent Document 4 in which the phenyl group is substituted at the 7-position of the carbazole ring, which is the para-position of the amino group, has a small molecular energy gap due to the wide conjugation of pi electrons, and the triplet level Is also low. Therefore, sufficient luminous efficiency cannot be obtained with an element combined with a phosphorescent material having green emission.
また、素子の耐久性は、正孔輸送層に電子を受容できるドーパントをドープすることで、向上することが報告されている(例えば、非特許文献2参照)。有機EL素子の駆動時には、発光層内で正孔と再結合しなかった電子が正孔輸送層に注入されるといった現象も起こるため、正孔輸送層への電子注入に伴うアミン化合物の不可逆的還元が素子の劣化要因の一つとして考えられている。 Further, it has been reported that the durability of the element is improved by doping the hole transport layer with a dopant capable of accepting electrons (see, for example, Non-Patent Document 2). When driving an organic EL device, a phenomenon occurs in which electrons that have not recombined with holes in the light-emitting layer are injected into the hole transport layer, so that the irreversible amine compound accompanying the injection of electrons into the hole transport layer Reduction is considered as one of the deterioration factors of the element.
本発明は、有機EL素子の正孔輸送材料に適したアミン化合物、さらには発光効率が高く、耐久性に優れた有機EL素子を提供することを目的とする。 An object of the present invention is to provide an amine compound suitable for a hole transport material of an organic EL device, and further an organic EL device having high luminous efficiency and excellent durability.
本発明者らは鋭意検討した結果、下記一般式(1)で表されるアミン化合物が正孔輸送特性に優れると共に、電子受容安定性のある該化合物を正孔輸送層に用いた有機EL素子は駆動電圧が低く、さらに発光効率及び耐久性に優れることを見出し、本発明を完成するに至った。即ち、本発明は、一般式(1) As a result of intensive studies, the present inventors have found that an amine compound represented by the following general formula (1) is excellent in hole transport properties and has an electron-accepting stability in an organic EL device using the compound in a hole transport layer. Has found that the driving voltage is low, and that the luminous efficiency and durability are excellent, and the present invention has been completed. That is, the present invention relates to general formula (1)
(式中、Arは炭素数1〜36の置換基又はハロゲン原子を有していてもよい炭素数6〜30のアリール基を表す。A及びBは各々独立して炭素数1〜36の置換基又はハロゲン原子を有していてもよい少なくとも1つのC=N結合を有する炭素数3〜20のヘテロアリール基を表す。X1及びX2は各々独立して炭素原子又は窒素原子を表す。R1、R2及びR4〜R7は各々独立して水素原子、ハロゲン原子、炭素数1〜18の直鎖、分岐若しくは環状のアルキル基、炭素数1〜18の直鎖、分岐若しくは環状のアルコキシ基、炭素数1〜36の置換基又はハロゲン原子を有していてもよい炭素数6〜30のアリール基、又は炭素数1〜36の置換基又はハロゲン原子を有していてもよい炭素数4〜20のヘテロアリール基を表す。R3は水素原子、ハロゲン原子、炭素数1〜18の直鎖、分岐若しくは環状のアルキル基、又は炭素数1〜18の直鎖、分岐若しくは環状のアルコキシ基を表す。R8及びR9は各々独立してハロゲン原子、炭素数1〜18の直鎖、分岐若しくは環状のアルキル基、炭素数1〜18の直鎖、分岐若しくは環状のアルコキシ基、又は炭素数1〜36の置換基又はハロゲン原子を有していてもよい炭素数6〜30のアリール基を表す。m及びnは各々独立して0又は1の整数を表し[但し、m+nは1又は2である]、p及びqは各々独立して0〜4の整数を表す。)
で表されるアミン化合物及びその用途に関するものである。
(In the formula, Ar represents a substituent having 1 to 36 carbon atoms or an aryl group having 6 to 30 carbon atoms which may have a halogen atom. A and B are each independently substituted having 1 to 36 carbon atoms. Represents a heteroaryl group having 3 to 20 carbon atoms and having at least one C═N bond which may have a group or a halogen atom, and X 1 and X 2 each independently represent a carbon atom or a nitrogen atom. R 1 , R 2 and R 4 to R 7 are each independently a hydrogen atom, a halogen atom, a linear, branched or cyclic alkyl group having 1 to 18 carbon atoms, a linear, branched or cyclic group having 1 to 18 carbon atoms. An alkoxy group having 1 to 36 carbon atoms, an aryl group having 6 to 30 carbon atoms which may have a halogen atom, or a substituent having 1 to 36 carbon atoms or a halogen atom. Represents a heteroaryl group having 4 to 20 carbon atoms R 3 is a hydrogen atom, a halogen atom, a straight chain of 1 to 18 carbon atoms, branched or cyclic alkyl group, or a straight-chain having 1 to 18 carbon atoms, .R 8 and R 9 represents a branched or cyclic alkoxy group Each independently a halogen atom, a linear, branched or cyclic alkyl group having 1 to 18 carbon atoms, a linear, branched or cyclic alkoxy group having 1 to 18 carbon atoms, or a substituent or halogen having 1 to 36 carbon atoms Represents an aryl group having 6 to 30 carbon atoms which may have an atom, and m and n each independently represents an integer of 0 or 1 [provided that m + n is 1 or 2]; Each independently represents an integer of 0-4.)
It is related with the amine compound represented by these, and its use.
以下、本発明に関し詳細に説明する。 Hereinafter, the present invention will be described in detail.
本発明の一般式(1)で表されるアミン化合物において、Arは炭素数1〜36の置換基又はハロゲン原子を有していてもよい炭素数6〜30のアリール基を表す。 In the amine compound represented by the general formula (1) of the present invention, Ar represents a substituent having 1 to 36 carbon atoms or an aryl group having 6 to 30 carbon atoms which may have a halogen atom.
Arで示される炭素数1〜36の置換基又はハロゲン原子を有していてもよい炭素数6〜30のアリール基において、炭素数6〜30のアリール基としては、特に限定するものではないが、フェニル基、ビフェニリル基、ターフェニル基、ナフチル基、フルオレニル基、フェナントリル基、ベンゾフルオレニル基、ジベンゾフルオレニル基、フルオランテニル基、ピレニル基、クリセニル基、ペリレニル基、ピセニル基等を挙げることができ、炭素数1〜36の置換基又はハロゲン原子としては、直鎖、分岐若しくは環状のアルキル基、直鎖、分岐若しくは環状のアルコキシ基、アリールオキシ基、トリアルキルシリル基、トリアリールシリル基、9−カルバゾリル基、フッ素、塩素、臭素、ヨウ素を挙げることができるが、置換位置、置換個数については特に限定はない。 In the aryl group having 6 to 30 carbon atoms which may have a substituent having 1 to 36 carbon atoms or a halogen atom represented by Ar, the aryl group having 6 to 30 carbon atoms is not particularly limited. Phenyl group, biphenylyl group, terphenyl group, naphthyl group, fluorenyl group, phenanthryl group, benzofluorenyl group, dibenzofluorenyl group, fluoranthenyl group, pyrenyl group, chrysenyl group, perylenyl group, picenyl group, etc. Examples of the substituent or halogen atom having 1 to 36 carbon atoms include linear, branched or cyclic alkyl groups, linear, branched or cyclic alkoxy groups, aryloxy groups, trialkylsilyl groups, and triaryls. Examples include silyl group, 9-carbazolyl group, fluorine, chlorine, bromine, and iodine. There is no particular limitation on the number.
直鎖、分岐若しくは環状のアルキル基としては、メチル基、エチル基、プロピル基、イソプロピル基、ブチル基、sec−ブチル基、tert−ブチル基、ペンチル基、ヘキシル基、ヘプチル基、オクチル基、ステアリル基、トリクロロメチル基、トリフルオロメチル基、シクロプロピル基、シクロヘキシル基等を例示することができるが、これらに限定されるものではない。 Examples of linear, branched or cyclic alkyl groups include methyl, ethyl, propyl, isopropyl, butyl, sec-butyl, tert-butyl, pentyl, hexyl, heptyl, octyl and stearyl. Examples thereof include, but are not limited to, a group, a trichloromethyl group, a trifluoromethyl group, a cyclopropyl group, and a cyclohexyl group.
直鎖、分岐若しくは環状のアルコキシ基としては、メトキシ基、エトキシ基、プロポキシ基、イソプロポキシ基、n−ブトキシ基、sec−ブトキシ基、tert−ブトキシ基、ペンチルオキシ基、ヘキシルオキシ基、ステアリルオキシ基等を例示することができるが、これらに限定されるものではない。 Linear, branched or cyclic alkoxy groups include methoxy, ethoxy, propoxy, isopropoxy, n-butoxy, sec-butoxy, tert-butoxy, pentyloxy, hexyloxy, stearyloxy Examples of the group include, but are not limited to, groups.
アリールオキシ基としては、フェノキシ基、4−メチルフェニルオキシ基、3−メチルフェニルオキシ基、4−ビフェニルオキシ基、3−ビフェニルオキシ基、1−ナフチルオキシ基、2−ナフチルオキシ基等を例示することができるが、これらに限定されるものではない。 Examples of the aryloxy group include a phenoxy group, a 4-methylphenyloxy group, a 3-methylphenyloxy group, a 4-biphenyloxy group, a 3-biphenyloxy group, a 1-naphthyloxy group, and a 2-naphthyloxy group. However, it is not limited to these.
トリアルキルシリル基としては、トリメチルシリル基、トリエチルシリル基、トリブチルシリル基等を例示することができるが、これらに限定されるものではない。 Examples of the trialkylsilyl group include, but are not limited to, a trimethylsilyl group, a triethylsilyl group, and a tributylsilyl group.
トリアリールシリル基としては、トリフェニルシリル基、トリ(4−メチルフェニル)シリル基、トリ(3−メチルフェニル)シリル基、トリ(4−メチルフェニル)シリル基、トリ(4−ビフェニル)シリル基等を例示することができるが、これらに限定されるものではない。 As triarylsilyl group, triphenylsilyl group, tri (4-methylphenyl) silyl group, tri (3-methylphenyl) silyl group, tri (4-methylphenyl) silyl group, tri (4-biphenyl) silyl group However, the present invention is not limited to these examples.
Arの具体例としては、フェニル基、4−メチルフェニル基、3−メチルフェニル基、2−メチルフェニル基、4−エチルフェニル基、3−エチルフェニル基、2−エチルフェニル基、4−n−プロピルフェニル基、4−イソプロピルフェニル基、2−イソプロピルフェニル基、4−n−ブチルフェニル基、4−イソブチルフェニル基、4−sec−ブチルフェニル基、4−tert−ブチルフェニル基、4−n−ペンチルフェニル基、4−イソペンチルフェニル基、4−ネオペンチルフェニル基、4−n−ヘキシルフェニル基、4−n−オクチルフェニル基、4−n−デシルフェニル基、4−n−ドデシルフェニル基、4−シクロペンチルフェニル基、4−シクロヘキシルフェニル基、4−トリチルフェニル基、3−トリチルフェニル基、4−トリフェニルシリルフェニル基、3−トリフェニルシリルフェニル基、2,4−ジメチルフェニル基、2,5−ジメチルフェニル基、3,4−ジメチルフェニル基、3,5−ジメチルフェニル基、2,6−ジメチルフェニル基、2,3,5−トリメチルフェニル基、2,3,6−トリメチルフェニル基、3,4,5−トリメチルフェニル基、4−メトキシフェニル基、3−メトキシフェニル基、2−メトキシフェニル基、4−エトキシフェニル基、3−エトキシフェニル基、2−エトキシフェニル基、4−n−プロポキシフェニル基、3−n−プロポキシフェニル基、4−イソプロポキシフェニル基、2−イソプロポキシフェニル基、4−n−ブトキシフェニル基、4−イソブトキシフェニル基、2−sec−ブトキシフェニル基、4−n−ペンチルオキシフェニル基、4−イソペンチルオキシフェニル基、2−イソペンチルオキシフェニル基、4−ネオペンチルオキシフェニル基、2−ネオペンチルオキシフェニル基、4−n−ヘキシルオキシフェニル基、2−(2−エチルブチル)オキシフェニル基、4−n−オクチルオキシフェニル基、4−n−デシルオキシフェニル基、4−n−ドデシルオキシフェニル基、4−n−テトラデシルオキシフェニル基、4−シクロヘキシルオキシフェニル基、2−シクロヘキシルオキシフェニル基、4−フェノキシフェニル基、2−メチル−4−メトキシフェニル基、2−メチル−5−メトキシフェニル基、3−メチル−4−メトキシフェニル基、3−メチル−5−メトキシフェニル基、3−エチル−5−メトキシフェニル基、2−メトキシ−4−メチルフェニル基、3−メトキシ−4−メチルフェニル基、2,4−ジメトキシフェニル基、2,5−ジメトキシフェニル基、2,6−ジメトキシフェニル基、3,4−ジメトキシフェニル基、3,5−ジメトキシフェニル基、3,5−ジエトキシフェニル基、3,5−ジ−n−ブトキシフェニル基、2−メトキシ−4−エトキシフェニル基、2−メトキシ−6−エトキシフェニル基、3,4,5−トリメトキシフェニル基、4−(9−カルバゾリル)フェニル基、3−(9−カルバゾリル)フェニル基、4−フルオロフェニル基、3−フルオロフェニル基、2−フルオロフェニル基、2,3−ジフルオロフェニル基、2,4−ジフルオロフェニル基、2,5−ジフルオロフェニル基、2,6−ジフルオロフェニル基、3,4−ジフルオロフェニル基、3,5−ジフルオロフェニル基、4−(1−ナフチル)フェニル基、4−(2−ナフチル)フェニル基、3−(1−ナフチル)フェニル基、3−(2−ナフチル)フェニル基、1−ナフチル基、2−ナフチル基、4−メチル−1−ナフチル基、6−メチル−2−ナフチル基、4−フェニル−1−ナフチル基、6−フェニル−2−ナフチル基、2−アントリル基、9−アントリル基、10−フェニル−9−アントリル基、2−フルオレニル基、9,9−ジメチル−2−フルオレニル基、9,9−ジエチル−2−フルオレニル基、9,9−ジ−n−プロピル−2−フルオレニル基、9,9−ジ−n−オクチル−2−フルオレニル基、9,9−ジフェニル−2−フルオレニル基、9,9’−スピロビフルオレニル基、9−フェナントリル基、2−フェナントリル基、ベンゾフルオレニル基、ジベンゾフルオレニル基、フルオランテニル基、ピレニル基、クリセニル基、ペリレニル基、ピセニル基、4−ビフェニリル基、3−ビフェニリル基、2−ビフェニリル基、p−ターフェニル基、m−ターフェニル基、o−ターフェニル基等を例示することができるが、これらに限定されるものではない。 Specific examples of Ar include phenyl group, 4-methylphenyl group, 3-methylphenyl group, 2-methylphenyl group, 4-ethylphenyl group, 3-ethylphenyl group, 2-ethylphenyl group, 4-n- Propylphenyl group, 4-isopropylphenyl group, 2-isopropylphenyl group, 4-n-butylphenyl group, 4-isobutylphenyl group, 4-sec-butylphenyl group, 4-tert-butylphenyl group, 4-n- Pentylphenyl group, 4-isopentylphenyl group, 4-neopentylphenyl group, 4-n-hexylphenyl group, 4-n-octylphenyl group, 4-n-decylphenyl group, 4-n-dodecylphenyl group, 4-cyclopentylphenyl group, 4-cyclohexylphenyl group, 4-tritylphenyl group, 3-tritylphenyl group, -Triphenylsilylphenyl group, 3-triphenylsilylphenyl group, 2,4-dimethylphenyl group, 2,5-dimethylphenyl group, 3,4-dimethylphenyl group, 3,5-dimethylphenyl group, 2,6 -Dimethylphenyl group, 2,3,5-trimethylphenyl group, 2,3,6-trimethylphenyl group, 3,4,5-trimethylphenyl group, 4-methoxyphenyl group, 3-methoxyphenyl group, 2-methoxy Phenyl group, 4-ethoxyphenyl group, 3-ethoxyphenyl group, 2-ethoxyphenyl group, 4-n-propoxyphenyl group, 3-n-propoxyphenyl group, 4-isopropoxyphenyl group, 2-isopropoxyphenyl group 4-n-butoxyphenyl group, 4-isobutoxyphenyl group, 2-sec-butoxyphenyl group, 4- -Pentyloxyphenyl group, 4-isopentyloxyphenyl group, 2-isopentyloxyphenyl group, 4-neopentyloxyphenyl group, 2-neopentyloxyphenyl group, 4-n-hexyloxyphenyl group, 2- ( 2-ethylbutyl) oxyphenyl group, 4-n-octyloxyphenyl group, 4-n-decyloxyphenyl group, 4-n-dodecyloxyphenyl group, 4-n-tetradecyloxyphenyl group, 4-cyclohexyloxyphenyl Group, 2-cyclohexyloxyphenyl group, 4-phenoxyphenyl group, 2-methyl-4-methoxyphenyl group, 2-methyl-5-methoxyphenyl group, 3-methyl-4-methoxyphenyl group, 3-methyl-5 -Methoxyphenyl group, 3-ethyl-5-methoxyphenyl group, 2-methoxy Ci-4-methylphenyl group, 3-methoxy-4-methylphenyl group, 2,4-dimethoxyphenyl group, 2,5-dimethoxyphenyl group, 2,6-dimethoxyphenyl group, 3,4-dimethoxyphenyl group, 3,5-dimethoxyphenyl group, 3,5-diethoxyphenyl group, 3,5-di-n-butoxyphenyl group, 2-methoxy-4-ethoxyphenyl group, 2-methoxy-6-ethoxyphenyl group, 3 , 4,5-trimethoxyphenyl group, 4- (9-carbazolyl) phenyl group, 3- (9-carbazolyl) phenyl group, 4-fluorophenyl group, 3-fluorophenyl group, 2-fluorophenyl group, 2, 3-difluorophenyl group, 2,4-difluorophenyl group, 2,5-difluorophenyl group, 2,6-difluorophenyl group, 3,4-diph Orophenyl group, 3,5-difluorophenyl group, 4- (1-naphthyl) phenyl group, 4- (2-naphthyl) phenyl group, 3- (1-naphthyl) phenyl group, 3- (2-naphthyl) phenyl group 1-naphthyl group, 2-naphthyl group, 4-methyl-1-naphthyl group, 6-methyl-2-naphthyl group, 4-phenyl-1-naphthyl group, 6-phenyl-2-naphthyl group, 2-anthryl Group, 9-anthryl group, 10-phenyl-9-anthryl group, 2-fluorenyl group, 9,9-dimethyl-2-fluorenyl group, 9,9-diethyl-2-fluorenyl group, 9,9-di-n -Propyl-2-fluorenyl group, 9,9-di-n-octyl-2-fluorenyl group, 9,9-diphenyl-2-fluorenyl group, 9,9'-spirobifluorenyl group, 9-phena Tolyl group, 2-phenanthryl group, benzofluorenyl group, dibenzofluorenyl group, fluoranthenyl group, pyrenyl group, chrysenyl group, perylenyl group, picenyl group, 4-biphenylyl group, 3-biphenylyl group, 2-biphenylyl group Group, p-terphenyl group, m-terphenyl group, o-terphenyl group and the like can be exemplified, but are not limited thereto.
一般式(1)で表されるアミン化合物において、ガラス転移温度が高く、緑色発光を有する燐光発光材料と比較して高い三重項準位を有することが好ましい点から、Arは炭素数1〜36の置換基又はハロゲン原子を有していてもよい4−ビフェニリル基、3−ビフェニリル基、m−ターフェニル基、4−(9−カルバゾリル)フェニル基、又は2−フルオレニル基であることが好ましい。 In the amine compound represented by the general formula (1), Ar has a high glass transition temperature and preferably has a triplet level higher than that of a phosphorescent material having green emission, and therefore Ar has 1 to 36 carbon atoms. Or a 4-biphenylyl group, a 3-biphenylyl group, an m-terphenyl group, a 4- (9-carbazolyl) phenyl group, or a 2-fluorenyl group, which may have a substituent or a halogen atom.
一般式(1)で表されるアミン化合物において、A及びBは各々独立して炭素数1〜36の置換基又はハロゲン原子を有していてもよい少なくとも1つのC=N結合を有する炭素数3〜20のヘテロアリール基を表す。 In the amine compound represented by the general formula (1), A and B are each independently a substituent having 1 to 36 carbon atoms or a carbon number having at least one C═N bond optionally having a halogen atom. Represents 3-20 heteroaryl groups.
A及びBで示される炭素数1〜36の置換基又はハロゲン原子を有していてもよい少なくとも1つのC=N結合を有する炭素数3〜20のヘテロアリール基において、少なくとも1つのC=N結合を有する炭素数3〜20のヘテロアリール基としては、電子受容性を有し、還元に対して安定であれば特に制限は無く、例えば、イミダゾリル基、ピラゾリル基、チアゾリル基、イソチアゾリル基、オキサゾリル基、イソオキサゾリル基、ピリジル基、ピリミジル基、ピラジル基、1,3,5−トリアジル基、ベンゾイミダゾリル基、インダゾリル基、ベンゾチアゾリル基、ベンゾイソチアゾリル基、2,1,3−ベンゾチアジアゾリル基、ベンゾオキサゾリル基、ベンゾイソオキサゾリル基、2,1,3−ベンゾオキサジアゾリル基、キノリル基、イソキノリル基、キノキサリル基、キナゾリル基、アクリジニル基、1,10−フェナントロリル基等を挙げることができ、炭素数1〜36の置換基又はハロゲン原子としては、特に限定するものではないが、前記Arで例示した炭素数1〜36の置換基又はハロゲン原子を挙げることができる。 In the heteroaryl group having 3 to 20 carbon atoms having at least one C═N bond which may have a substituent having 1 to 36 carbon atoms or a halogen atom represented by A and B, at least one C═N The heteroaryl group having 3 to 20 carbon atoms having a bond is not particularly limited as long as it has an electron accepting property and is stable to reduction. For example, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group Group, isoxazolyl group, pyridyl group, pyrimidyl group, pyrazyl group, 1,3,5-triazyl group, benzoimidazolyl group, indazolyl group, benzothiazolyl group, benzoisothiazolyl group, 2,1,3-benzothiadiazolyl group, Benzoxazolyl group, benzoisoxazolyl group, 2,1,3-benzooxadiazolyl group, quinolyl , An isoquinolyl group, a quinoxalyl group, a quinazolyl group, an acridinyl group, a 1,10-phenanthroyl group, and the like. The substituent or halogen atom having 1 to 36 carbon atoms is not particularly limited, but the Ar And a substituent having 1 to 36 carbon atoms or a halogen atom exemplified in the above.
A及びBの具体例としては、1−イミダゾリル基、2−フェニル−1−イミダゾリル基、2−フェニル−3,4−ジメチル−1−イミダゾリル基、2,3,4−トリフェニル−1−イミダゾリル基、2−(2−ナフチル)−3,4−ジメチル−1−イミダゾリル基、2−(2−ナフチル)−3,4−ジフェニル−1−イミダゾリル基、1−メチル−2−イミダゾリル基、1−エチル−2−イミダゾリル基、1−フェニル−2−イミダゾリル基、1−メチル−4−フェニル−2−イミダゾリル基、1−メチル−4,5−ジメチル−2−イミダゾリル基、1−メチル−4,5−ジフェニル−2−イミダゾリル基、1−フェニル−4,5−ジメチル−2−イミダゾリル基、1−フェニル−4,5−ジフェニル−2−イミダゾリル基、1−フェニル−4,5−ジビフェニリル−2−イミダゾリル基、1−メチル−3−ピラゾリル基、1−フェニル−3−ピラゾリル基、1−メチル−4−ピラゾリル基、1−フェニル−4−ピラゾリル基、1−メチル−5−ピラゾリル基、1−フェニル−5−ピラゾリル基、2−チアゾリル基、4−チアゾリル基、5−チアゾリル基、3−イソチアゾリル基、4−イソチアゾリル基、5−イソチアゾリル基、2−オキサゾリル基、4−オキサゾリル基、5−オキサゾリル基、3−イソオキサゾリル基、4−イソオキサゾリル基、5−イソオキサゾリル基、2−ピリジル基、3−メチル−2−ピリジル基、4−メチル−2−ピリジル基、5−メチル−2−ピリジル基、6−メチル−2−ピリジル基、3−ピリジル基、4−メチル−3−ピリジル基、4−ピリジル基、2−ピリミジル基、5−ピリミジル基、ピラジル基、1,3,5−トリアジル基、4,6−ジフェニル−1,3,5−トリアジン−2−イル基、1−ベンゾイミダゾリル基、2−メチル−1−ベンゾイミダゾリル基、2−フェニル−1−ベンゾイミダゾリル基、1−メチル−2−ベンゾイミダゾリル基、1−フェニル−2−ベンゾイミダゾリル基、1−メチル−5−ベンゾイミダゾリル基、1,2−ジメチル−5−ベンゾイミダゾリル基、1−メチル−2−フェニル−5−ベンゾイミダゾリル基、1−フェニル−5−ベンゾイミダゾリル基、1,2−ジフェニル−5−ベンゾイミダゾリル基、1−メチル−6−ベンゾイミダゾリル基、1,2−ジメチル−6−ベンゾイミダゾリル基、1−メチル−2−フェニル−6−ベンゾイミダゾリル基、1−フェニル−6−ベンゾイミダゾリル基、1,2−ジフェニル−6−ベンゾイミダゾリル基、1−メチル−3−インダゾリル基、1−フェニル−3−インダゾリル基、2−ベンゾチアゾリル基、4−ベンゾチアゾリル基、5−ベンゾチアゾリル基、6−ベンゾチアゾリル基、7−ベンゾチアゾリル基、3−ベンゾイソチアゾリル基、4−ベンゾイソチアゾリル基、5−ベンゾイソチアゾリル基、6−ベンゾイソチアゾリル基、7−ベンゾイソチアゾリル基、2,1,3−ベンゾチアジアゾリル−4−イル基、2,1,3−ベンゾチアジアゾリル−5−イル基、2−ベンゾオキサゾリル基、4−ベンゾオキサゾリル基、5−ベンゾオキサゾリル基、6−ベンゾオキサゾリル基、7−ベンゾオキサゾリル基、3−ベンゾイソオキサゾリル基、4−ベンゾイソオキサゾリル基、5−ベンゾイソオキサゾリル基、6−ベンゾイソオキサゾリル基、7−ベンゾイソオキサゾリル基、2,1,3−ベンゾオキサジアゾリル−4−イル基、2,1,3−ベンゾオキサジアゾリル−5−イル基、2−キノリル基、3−キノリル基、5−キノリル基、6−キノリル基、1−イソキノリル基、4−イソキノリル基、5−イソキノリル基、2−キノキサリル基、3−フェニル−2−キノキサリル基、6−キノキサリル基、2,3−ジメチル−6−キノキサリル基、2,3−ジフェニル−6−キノキサリル基、2−キナゾリル基、4−キナゾリル基、2−アクリジニル基、9−アクリジニル基、1,10−フェナントロリン−3−イル基、1,10−フェナントロリン−5−イル基等を例示することができるが、これらに限定されるものではない。 Specific examples of A and B include 1-imidazolyl group, 2-phenyl-1-imidazolyl group, 2-phenyl-3,4-dimethyl-1-imidazolyl group, 2,3,4-triphenyl-1-imidazolyl. Group, 2- (2-naphthyl) -3,4-dimethyl-1-imidazolyl group, 2- (2-naphthyl) -3,4-diphenyl-1-imidazolyl group, 1-methyl-2-imidazolyl group, 1 -Ethyl-2-imidazolyl group, 1-phenyl-2-imidazolyl group, 1-methyl-4-phenyl-2-imidazolyl group, 1-methyl-4,5-dimethyl-2-imidazolyl group, 1-methyl-4 , 5-diphenyl-2-imidazolyl group, 1-phenyl-4,5-dimethyl-2-imidazolyl group, 1-phenyl-4,5-diphenyl-2-imidazolyl group, 1-phenyl- , 5-Dibiphenylyl-2-imidazolyl group, 1-methyl-3-pyrazolyl group, 1-phenyl-3-pyrazolyl group, 1-methyl-4-pyrazolyl group, 1-phenyl-4-pyrazolyl group, 1-methyl- 5-pyrazolyl group, 1-phenyl-5-pyrazolyl group, 2-thiazolyl group, 4-thiazolyl group, 5-thiazolyl group, 3-isothiazolyl group, 4-isothiazolyl group, 5-isothiazolyl group, 2-oxazolyl group, 4 -Oxazolyl group, 5-oxazolyl group, 3-isoxazolyl group, 4-isoxazolyl group, 5-isoxazolyl group, 2-pyridyl group, 3-methyl-2-pyridyl group, 4-methyl-2-pyridyl group, 5-methyl 2-pyridyl group, 6-methyl-2-pyridyl group, 3-pyridyl group, 4-methyl-3-pyridyl group, 4-pyridyl group 2-pyrimidyl group, 5-pyrimidyl group, pyrazyl group, 1,3,5-triazyl group, 4,6-diphenyl-1,3,5-triazin-2-yl group, 1-benzimidazolyl group, 2-methyl -1-Benzimidazolyl group, 2-phenyl-1-benzimidazolyl group, 1-methyl-2-benzoimidazolyl group, 1-phenyl-2-benzimidazolyl group, 1-methyl-5-benzimidazolyl group, 1,2-dimethyl-5 Benzimidazolyl group, 1-methyl-2-phenyl-5-benzimidazolyl group, 1-phenyl-5-benzoimidazolyl group, 1,2-diphenyl-5-benzimidazolyl group, 1-methyl-6-benzimidazolyl group, 1,2-dimethyl -6-Benzimidazolyl group, 1-methyl-2-phenyl-6-benzimidazolyl group 1-phenyl-6-benzimidazolyl group, 1,2-diphenyl-6-benzimidazolyl group, 1-methyl-3-indazolyl group, 1-phenyl-3-indazolyl group, 2-benzothiazolyl group, 4-benzothiazolyl group, 5 -Benzothiazolyl group, 6-benzothiazolyl group, 7-benzothiazolyl group, 3-benzoisothiazolyl group, 4-benzoisothiazolyl group, 5-benzisothiazolyl group, 6-benzoisothiazolyl group, 7-benzoisothialyl group Azolyl group, 2,1,3-benzothiadiazolyl-4-yl group, 2,1,3-benzothiadiazolyl-5-yl group, 2-benzoxazolyl group, 4-benzoxazolyl group Group, 5-benzoxazolyl group, 6-benzoxazolyl group, 7-benzoxazolyl group, 3-benzisoxazolyl group, -Benzoisoxazolyl group, 5-benzoisoxazolyl group, 6-benzoisoxazolyl group, 7-benzisoxazolyl group, 2,1,3-benzoxoxadiazolyl-4-yl group 2,1,3-benzooxadiazolyl-5-yl group, 2-quinolyl group, 3-quinolyl group, 5-quinolyl group, 6-quinolyl group, 1-isoquinolyl group, 4-isoquinolyl group, 5-isoquinolyl group Group, 2-quinoxalyl group, 3-phenyl-2-quinoxalyl group, 6-quinoxalyl group, 2,3-dimethyl-6-quinoxalyl group, 2,3-diphenyl-6-quinoxalyl group, 2-quinazolyl group, 4- Examples thereof include quinazolyl group, 2-acridinyl group, 9-acridinyl group, 1,10-phenanthroline-3-yl group, 1,10-phenanthroline-5-yl group and the like. That, without being limited thereto.
一般式(1)で表されるアミン化合物において、還元に対する安定性及び耐熱性が高いことが好ましい点から、A及びBは各々独立して炭素数1〜36の置換基又はハロゲン原子を有していてもよいイミダゾリル基、チアゾリル基、ピリジル基、ピリミジル基、ピラジル基、1,3,5−トリアジル基、ベンゾイミダゾリル基、ベンゾチアゾリル基、又はキノキサリル基から選ばれる置換基であることが好ましい。 In the amine compound represented by the general formula (1), A and B each independently have a substituent having 1 to 36 carbon atoms or a halogen atom from the viewpoint of high stability against reduction and high heat resistance. It may preferably be a substituent selected from an imidazolyl group, a thiazolyl group, a pyridyl group, a pyrimidyl group, a pyrazyl group, a 1,3,5-triazyl group, a benzoimidazolyl group, a benzothiazolyl group, or a quinoxalyl group.
一般式(1)で表されるアミン化合物において、X1及びX2は各々独立して炭素原子又は窒素原子を表す。 In the amine compound represented by the general formula (1), X 1 and X 2 each independently represent a carbon atom or a nitrogen atom.
一般式(1)で表されるアミン化合物において、R1、R2及びR4〜R7は各々独立して水素原子、ハロゲン原子、炭素数1〜18の直鎖、分岐若しくは環状のアルキル基、炭素数1〜18の直鎖、分岐若しくは環状のアルコキシ基、炭素数1〜36の置換基又はハロゲン原子を有していてもよい炭素数6〜30のアリール基、又は炭素数1〜36の置換基又はハロゲン原子を有していてもよい炭素数4〜20のヘテロアリール基を表す。 In the amine compound represented by the general formula (1), R 1 , R 2 and R 4 to R 7 are each independently a hydrogen atom, a halogen atom, a linear, branched or cyclic alkyl group having 1 to 18 carbon atoms. , A C1-C18 linear, branched or cyclic alkoxy group, a C1-C36 substituent, or a C6-C30 aryl group optionally having a halogen atom, or C1-C36 Or a heteroaryl group having 4 to 20 carbon atoms which may have a substituent or a halogen atom.
R1、R2及びR4〜R7で示されるハロゲン原子としては、フッ素、塩素、臭素、又はヨウ素原子が挙げられる。 Examples of the halogen atom represented by R 1 , R 2 and R 4 to R 7 include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.
R1、R2及びR4〜R7で示される炭素数1〜18の直鎖、分岐若しくは環状のアルキル基としては、具体的には、メチル基、エチル基、プロピル基、イソプロピル基、ブチル基、sec−ブチル基、tert−ブチル基、ペンチル基、ヘキシル基、ヘプチル基、オクチル基、ステアリル基、トリクロロメチル基、トリフルオロメチル基、シクロプロピル基、シクロヘキシル基等を例示することができるが、これらに限定されるものではない。 Specific examples of the linear, branched or cyclic alkyl group having 1 to 18 carbon atoms represented by R 1 , R 2 and R 4 to R 7 include a methyl group, an ethyl group, a propyl group, an isopropyl group, and butyl. Group, sec-butyl group, tert-butyl group, pentyl group, hexyl group, heptyl group, octyl group, stearyl group, trichloromethyl group, trifluoromethyl group, cyclopropyl group, cyclohexyl group and the like. However, it is not limited to these.
R1、R2及びR4〜R7で示される炭素数1〜18の直鎖、分岐若しくは環状のアルコキシ基としては、具体的には、メトキシ基、エトキシ基、プロポキシ基、イソプロポキシ基、n−ブトキシ基、sec−ブトキシ基、tert−ブトキシ基、ペンチルオキシ基、ヘキシルオキシ基、ステアリルオキシ基等を例示することができるが、これらに限定されるものではない。 Specific examples of the linear, branched or cyclic alkoxy group having 1 to 18 carbon atoms represented by R 1 , R 2 and R 4 to R 7 include a methoxy group, an ethoxy group, a propoxy group, an isopropoxy group, Examples thereof include, but are not limited to, an n-butoxy group, a sec-butoxy group, a tert-butoxy group, a pentyloxy group, a hexyloxy group, and a stearyloxy group.
R1、R2及びR4〜R7で示される炭素数1〜36の置換基又はハロゲン原子を有していてもよい炭素数6〜30のアリール基としては、特に限定するものではないが、前記Arで例示した炭素数1〜36の置換基又はハロゲン原子を有していてもよい炭素数6〜30のアリール基が挙げられる。 The substituent having 1 to 36 carbon atoms represented by R 1 , R 2 and R 4 to R 7 or the aryl group having 6 to 30 carbon atoms which may have a halogen atom is not particularly limited. And C1-C36 aryl groups optionally having a substituent having 1 to 36 carbon atoms or a halogen atom exemplified for Ar.
R1、R2及びR4〜R7で示される炭素数1〜36の置換基又はハロゲン原子を有していてもよい炭素数4〜20のヘテロアリール基において、炭素数4〜20のヘテロアリール基としては、酸素原子、窒素原子及び硫黄原子のうち少なくとも一つのヘテロ原子を含有する芳香族基であり、特に限定するものではないが、例えば、2−ピリジル基、3−ピリジル基、4−ピリジル基、3−キノリル基、4−キノリル基、2−フリル基、3−フリル基、2−チエニル基、3−チエニル基、2−オキサゾリル基、2−チアゾリル基、2−ベンゾオキサゾリル基、2−ベンゾチアゾリル基、2−ベンゾチオフェニル基、3−ベンゾチオフェニル基、2−ベンゾイミダゾリル基、2−ジベンゾチオフェニル基、3−ジベンゾチオフェニル基、2−ジベンゾフラニル基、3−ジベンゾフラニル基等を例示することができ、炭素数1〜36の置換基又はハロゲン原子としては、特に限定するものではないが、前記Arで例示した炭素数1〜36の置換基又はハロゲン原子を挙げることができる。 In the heteroaryl group having 4 to 20 carbon atoms which may have a substituent having 1 to 36 carbon atoms or a halogen atom represented by R 1 , R 2 and R 4 to R 7 , hetero atoms having 4 to 20 carbon atoms The aryl group is an aromatic group containing at least one hetero atom among an oxygen atom, a nitrogen atom, and a sulfur atom, and is not particularly limited. For example, a 2-pyridyl group, a 3-pyridyl group, 4 -Pyridyl group, 3-quinolyl group, 4-quinolyl group, 2-furyl group, 3-furyl group, 2-thienyl group, 3-thienyl group, 2-oxazolyl group, 2-thiazolyl group, 2-benzoxazolyl Group, 2-benzothiazolyl group, 2-benzothiophenyl group, 3-benzothiophenyl group, 2-benzimidazolyl group, 2-dibenzothiophenyl group, 3-dibenzothiophenyl group, 2 A dibenzofuranyl group, a 3-dibenzofuranyl group, and the like can be exemplified, and the substituent or halogen atom having 1 to 36 carbon atoms is not particularly limited. There may be mentioned 36 substituents or halogen atoms.
一般式(1)で表されるアミン化合物において、R3は水素原子、ハロゲン原子、炭素数1〜18の直鎖、分岐若しくは環状のアルキル基、又は炭素数1〜18の直鎖、分岐若しくは環状のアルコキシ基を表す。 In the amine compound represented by the general formula (1), R 3 is a hydrogen atom, a halogen atom, a linear, branched or cyclic alkyl group having 1 to 18 carbon atoms, or a linear, branched or cyclic group having 1 to 18 carbon atoms. Represents a cyclic alkoxy group.
R3で示されるハロゲン原子、炭素数1〜18の直鎖、分岐若しくは環状のアルキル基、又は炭素数1〜18の直鎖、分岐若しくは環状のアルコキシ基としては、それぞれ前記R1、R2及びR4〜R7で例示したハロゲン原子、炭素数1〜18の直鎖、分岐若しくは環状のアルキル基、又は炭素数1〜18の直鎖、分岐若しくは環状のアルコキシ基が挙げられる。 Examples of the halogen atom represented by R 3 , a straight-chain, branched or cyclic alkyl group having 1 to 18 carbon atoms, or a straight-chain, branched or cyclic alkoxy group having 1 to 18 carbon atoms are the above R 1 and R 2 , respectively. And a halogen atom exemplified as R 4 to R 7 , a linear, branched or cyclic alkyl group having 1 to 18 carbon atoms, or a linear, branched or cyclic alkoxy group having 1 to 18 carbon atoms.
一般式(1)で表されるアミン化合物において、R8及びR9は各々独立してハロゲン原子、炭素数1〜18の直鎖、分岐若しくは環状のアルキル基、炭素数1〜18の直鎖、分岐若しくは環状のアルコキシ基、又は炭素数1〜36の置換基又はハロゲン原子を有していてもよい炭素数6〜30のアリール基を表す。 In the amine compound represented by the general formula (1), R 8 and R 9 are each independently a halogen atom, a straight chain having 1 to 18 carbon atoms, a branched or cyclic alkyl group, or a straight chain having 1 to 18 carbon atoms. Represents a branched or cyclic alkoxy group, or a substituent having 1 to 36 carbon atoms or an aryl group having 6 to 30 carbon atoms which may have a halogen atom.
R8及びR9で示されるハロゲン原子、炭素数1〜18の直鎖、分岐若しくは環状のアルキル基、又は炭素数1〜18の直鎖、分岐若しくは環状のアルコキシ基としては、それぞれ前記R1、R2及びR4〜R7で例示したハロゲン原子、炭素数1〜18の直鎖、分岐若しくは環状のアルキル基、又は炭素数1〜18の直鎖、分岐若しくは環状のアルコキシ基が挙げられる。 As the halogen atom represented by R 8 and R 9 , a linear, branched or cyclic alkyl group having 1 to 18 carbon atoms, or a linear, branched or cyclic alkoxy group having 1 to 18 carbon atoms, respectively, R 1 , R 2 and the halogen atoms exemplified for R 4 to R 7 , a linear, branched or cyclic alkyl group having 1 to 18 carbon atoms, or a linear, branched or cyclic alkoxy group having 1 to 18 carbon atoms. .
R8及びR9で示される炭素数1〜36の置換基又はハロゲン原子を有していてもよい炭素数6〜30のアリール基としては、特に限定するものではないが、前記Arで例示した炭素数1〜36の置換基又はハロゲン原子を有していてもよい炭素数6〜30のアリール基が挙げられる。 The aryl group having 6 to 30 carbon atoms which may have a substituent having 1 to 36 carbon atoms or a halogen atom represented by R 8 and R 9 is not particularly limited, but is exemplified by Ar. Examples thereof include a substituent having 1 to 36 carbon atoms or an aryl group having 6 to 30 carbon atoms which may have a halogen atom.
一般式(1)で表されるアミン化合物において、m及びnは各々独立して0又は1の整数を表す。但し、m+nは1又は2である。 In the amine compound represented by the general formula (1), m and n each independently represents an integer of 0 or 1. However, m + n is 1 or 2.
一般式(1)で表されるアミン化合物において、p及びqは各々独立して0〜4の整数を表す。 In the amine compound represented by the general formula (1), p and q each independently represents an integer of 0 to 4.
以下に好ましい化合物を例示するが、これらの化合物に限定されるものではない。 Preferred compounds are illustrated below, but are not limited to these compounds.
前記一般式(1)で表されるアミン化合物は、例えば、公知の方法(Tetrahedron Letters,1998年,第39巻,2367頁)によって合成することができる。具体的には、下記のルートにより合成することができる。 The amine compound represented by the general formula (1) can be synthesized, for example, by a known method (Tetrahedron Letters, 1998, Vol. 39, page 2367). Specifically, it can be synthesized by the following route.
(ルートa)2位がハロゲン化された9H−カルバゾール化合物とハロゲン化芳香族化合物を、塩基の存在下、銅触媒又はパラジウム触媒を用いて反応させた生成物(2−ハロゲン化−9−置換カルバゾール)に、2級アミン化合物を、塩基の存在下、銅触媒又はパラジウム触媒を用いて反応させる。 (Route a) 9H-carbazole compound halogenated at 2-position and a halogenated aromatic compound in the presence of a base using a copper catalyst or a palladium catalyst (2-halogenated-9-substituted) Carbazole) is reacted with a secondary amine compound in the presence of a base using a copper catalyst or a palladium catalyst.
(ルートb)2位がハロゲン化された9H−カルバゾール化合物とハロゲン化芳香族化合物を、塩基の存在下、銅触媒又はパラジウム触媒を用いて反応させた生成物(2−ハロゲン化−9−置換カルバゾール)に、1級アミン化合物を、塩基の存在下、銅触媒又はパラジウム触媒を用いて反応させて2級アミンを得る。さらに得られた2級アミンにハロゲン化芳香族化合物を、塩基の存在下、銅触媒又はパラジウム触媒を用いて反応させる。 (Route b) Product obtained by reacting 9H-carbazole compound halogenated at the 2-position with a halogenated aromatic compound using a copper catalyst or a palladium catalyst in the presence of a base (2-halogenated-9-substituted) Carbazole) is reacted with a primary amine compound in the presence of a base using a copper catalyst or a palladium catalyst to obtain a secondary amine. Further, the obtained secondary amine is reacted with a halogenated aromatic compound in the presence of a base using a copper catalyst or a palladium catalyst.
本発明の前記一般式(1)で表されるアミン化合物は、有機EL素子の発光層、正孔輸送層又は正孔注入層として使用することができる。 The amine compound represented by the general formula (1) of the present invention can be used as a light emitting layer, a hole transport layer or a hole injection layer of an organic EL device.
特に、前記一般式(1)で表されるアミン化合物は、正孔輸送能に優れることから、正孔輸送層及び/又は正孔注入層として使用した際に、有機EL素子の低駆動電圧化、高発光効率化及び耐久性の向上を実現することができる。また、前記一般式(1)で表される
アミン化合物は、従来材料と比較して三重項準位が高いため、蛍光発光材料だけでなく、燐光発光材料を発光層に用いた素子においても高い発光効率を得ることができる。
In particular, since the amine compound represented by the general formula (1) is excellent in hole transport ability, when used as a hole transport layer and / or a hole injection layer, the driving voltage of the organic EL device is reduced. Thus, it is possible to achieve high luminous efficiency and improved durability. In addition, the amine compound represented by the general formula (1) has a high triplet level as compared with a conventional material, so that it is high not only in a fluorescent material but also in an element using a phosphorescent material in a light emitting layer. Luminous efficiency can be obtained.
前記一般式(1)で表されるアミン化合物を有機EL素子の正孔注入層及び/又は正孔輸送層として使用する際の発光層には、従来から使用されている公知の蛍光若しくは燐光発光材料を使用することができる。発光層は1種類の発光材料のみで形成されていても、ホスト材料中に1種類以上の発光材料がドープされていてもよい。 In the light emitting layer when the amine compound represented by the general formula (1) is used as a hole injection layer and / or a hole transport layer of an organic EL device, a known fluorescent or phosphorescent light emitting material that has been conventionally used is used. Material can be used. The light emitting layer may be formed of only one kind of light emitting material, or one or more kinds of light emitting materials may be doped in the host material.
前記一般式(1)で表されるアミン化合物からなる正孔注入層及び/又は正孔輸送層を形成する際には、必要に応じて2種類以上の材料を含有若しくは積層させてもよく、例えば、酸化モリブデン等の酸化物、7,7,8,8−テトラシアノキノジメタン、2,3,5,6−テトラフルオロ−7,7,8,8−テトラシアノキノジメタン、ヘキサシアノヘキサアザトリフェニレン等の公知の電子受容性材料を含有若しくは積層させてもよい。 When forming the hole injection layer and / or hole transport layer made of the amine compound represented by the general formula (1), two or more kinds of materials may be contained or laminated as necessary. For example, oxides such as molybdenum oxide, 7,7,8,8-tetracyanoquinodimethane, 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane, hexacyanohexahexa A known electron-accepting material such as azatriphenylene may be contained or laminated.
前記一般式(1)で表されるアミン化合物を有機EL素子の発光層として使用する場合には、アミン化合物を単独で使用、公知の発光ホスト材料にドープして使用、又は公知の発光ドーパントをドープして使用することができる。 When the amine compound represented by the general formula (1) is used as the light emitting layer of the organic EL device, the amine compound is used alone, used by doping a known light emitting host material, or a known light emitting dopant. Can be used by doping.
前記一般式(1)で表されるアミン化合物を含有する正孔注入層、正孔輸送層又は発光層を形成する方法としては、例えば、真空蒸着法、スピンコート法、キャスト法等の公知の方法を適用することができる。 As a method for forming a hole injection layer, a hole transport layer, or a light emitting layer containing the amine compound represented by the general formula (1), for example, a known method such as a vacuum deposition method, a spin coating method, or a casting method is used. The method can be applied.
本発明による一般式(1)で表されるアミン化合物は、従来材料以上の高い正孔輸送能力を有すると共に、電子受容安定性があるため、有機EL素子の低駆動電圧化、高発光効率化、耐久性の向上を実現することができる。 The amine compound represented by the general formula (1) according to the present invention has a higher hole transport capability than conventional materials and has an electron accepting stability. Durability can be improved.
以下、本発明を実施例に基づきさらに詳細に説明するが、本発明はこれら実施例により限定されるものではない。 EXAMPLES Hereinafter, although this invention is demonstrated further in detail based on an Example, this invention is not limited by these Examples.
1H−NMR及び13C−NMR測定は、バリアン社製 Gemini200を用いて行った。 1 H-NMR and 13 C-NMR measurements were performed using Gemini 200 manufactured by Varian.
FDMS測定は、日立製作所製 M−80Bを用いて行った。 The FDMS measurement was performed using Hitachi M-80B.
還元特性は、北斗電工製のHA−501及びHB−104を使用したサイクリックボルタンメトリーで評価した。 The reduction characteristics were evaluated by cyclic voltammetry using HA-501 and HB-104 manufactured by Hokuto Denko.
有機EL素子の発光特性は、作製した素子に直流電流を印加し、TOPCON社製のLUMINANCEMETER(BM−9)の輝度計を用いて評価した。 The light emission characteristics of the organic EL element were evaluated by applying a direct current to the produced element and using a luminance meter of LUMINANCEMETER (BM-9) manufactured by TOPCON.
合成例1 (2−(4−クロロフェニル)ニトロベンゼンの合成[下記式(2)参照])
窒素気流下、500mLの三口フラスコに、o−ブロモニトロベンゼン 25.0g(123.0mmol)、p−クロロフェニルボロン酸 21.1g(135.3mmol)、テトラキス(トリフェニルホスフィン)パラジウム 0.71g(0.61mmol)、テトラヒドロフラン 100mL、20wt%の炭酸ナトリウム水溶液 162g(炭酸ナトリウムとして307.5mmol)を加え、8時間加熱還流した。室温まで冷却した後、水層と有機層を分液し、有機層を飽和塩化アンモニウム水溶液で洗浄し、さらに飽和塩化ナトリウム水溶液で洗浄した。有機相を無水硫酸マグネシウムで乾燥後、濾過により不溶物を除去した溶液を減圧下に濃縮し、残渣をシリカゲルカラムクロマトグラフィー(トルエン)で精製し、2−(4−クロロフェニル)ニトロベンゼンを27.2g単離した(収率94%)。
Synthesis Example 1 (Synthesis of 2- (4-chlorophenyl) nitrobenzene [see the following formula (2)])
In a 500 mL three-neck flask under a nitrogen stream, o-bromonitrobenzene 25.0 g (123.0 mmol), p-chlorophenylboronic acid 21.1 g (135.3 mmol), tetrakis (triphenylphosphine) palladium 0.71 g (0. 61 mmol), 100 mL of tetrahydrofuran, 162 g of a 20 wt% aqueous sodium carbonate solution (307.5 mmol as sodium carbonate) were added, and the mixture was heated to reflux for 8 hours. After cooling to room temperature, the aqueous layer and the organic layer were separated, and the organic layer was washed with a saturated aqueous ammonium chloride solution and further washed with a saturated aqueous sodium chloride solution. The organic phase was dried over anhydrous magnesium sulfate, the solution from which insolubles were removed by filtration was concentrated under reduced pressure, the residue was purified by silica gel column chromatography (toluene), and 27.2 g of 2- (4-chlorophenyl) nitrobenzene was obtained. Isolated (94% yield).
化合物の同定は、1H−NMR測定、13C−NMR測定により行った。 The compound was identified by 1 H-NMR measurement and 13 C-NMR measurement.
1H−NMR(CDCl3)δ(ppm); 7.87(d,1H),7.36−7.66(m,5H),7.21−7.27(m,2H)
13C−NMR(CDCl3)δ(ppm); 148.98,135.85,135.12,134.37,132.45,131.79,129.23,128.84,128.53,124.21
合成例2 (2−クロロカルバゾールの合成[下記式(2)参照])
窒素気流下、200mLのナス型フラスコに、合成例1で得た2−(4−クロロフェニル)ニトロベンゼン 10.0g(42.7mmol)を仕込み、亜リン酸トリエチルを50mL加えた後、150℃で24時間攪拌した。減圧下に亜リン酸トリエチルを留去し、残渣にo−キシレンを加えて再結晶することにより、2−クロロカルバゾールの白色粉末を5.1g(25.6mmol)単離した(収率60%)。
1 H-NMR (CDCl 3 ) δ (ppm); 7.87 (d, 1H), 7.36-7.66 (m, 5H), 7.21-7.27 (m, 2H)
13 C-NMR (CDCl 3 ) δ (ppm); 148.98, 135.85, 135.12, 134.37, 132.45, 131.79, 129.23, 128.84, 128.53, 124 .21
Synthesis Example 2 (Synthesis of 2-chlorocarbazole [see the following formula (2)])
Under a nitrogen stream, a 200 mL eggplant-shaped flask was charged with 10.0 g (42.7 mmol) of 2- (4-chlorophenyl) nitrobenzene obtained in Synthesis Example 1, 50 mL of triethyl phosphite was added, and then the mixture was heated at 150 ° C. for 24 hours. Stir for hours. Triethyl phosphite was distilled off under reduced pressure, and 5.1 g (25.6 mmol) of 2-chlorocarbazole white powder was isolated by adding o-xylene to the residue and recrystallizing (yield 60%). ).
化合物の同定は、1H−NMR測定、13C−NMR測定により行った。 The compound was identified by 1 H-NMR measurement and 13 C-NMR measurement.
1H−NMR(Acetone−d6)δ(ppm); 10.46(br−s,1H),8.10(d,2H),7.37−7.55(m,3H),7.15−7.24(m,2H)
13C−NMR(Acetone−d6)δ(ppm); 141.35,141.15,131.33,126.70,123.17,122.64,121.92,120.84,120.09,119.78,111.81,111.43
1 H-NMR (Acetone-d 6 ) δ (ppm); 10.46 (br-s, 1H), 8.10 (d, 2H), 7.37-7.55 (m, 3H), 7. 15-7.24 (m, 2H)
13 C-NMR (acetone-d 6 ) δ (ppm); 141.35, 141.15, 131.33, 126.70, 123.17, 122.64, 121.92, 120.84, 120.09 119.78, 111.811, 111.43
合成例3 (2−クロロ−N−(4−ビフェニリル)カルバゾールの合成)
窒素気流下、50mLの三口フラスコに、合成例2で得た2−クロロカルバゾール 4.0g(19.8mmol)、4−ブロモビフェニル 5.5g(23.7mmol)、炭酸カリウム 3.83g(27.7mmol)、o−キシレン 20mLを加え、スラリー状の反応液に酢酸パラジウム 44mg(0.19mmol)、トリ(tert−ブチル)ホスフィン 0.14g(0.69mmol)を添加して130℃で24時間攪拌した。室温まで冷却後、析出した沈殿を濾取し、得られた固体を水で洗浄し、さらにメタノールで洗浄した。減圧乾燥した後、n−ブタノールで再結晶し、2−クロロ−N−(4−ビフェニリル)カルバゾールの白色粉末を4.9g(13.8mmol)単離した(収率69%)。
Synthesis Example 3 (Synthesis of 2-chloro-N- (4-biphenylyl) carbazole)
In a 50 mL three-necked flask under a nitrogen stream, 4.0 g (19.8 mmol) of 2-chlorocarbazole obtained in Synthesis Example 2, 5.5 g (23.7 mmol) of 4-bromobiphenyl, 3.83 g of potassium carbonate (27. 7 mmol) and 20 mL of o-xylene were added, and 44 mg (0.19 mmol) of palladium acetate and 0.14 g (0.69 mmol) of tri (tert-butyl) phosphine were added to the slurry reaction solution, followed by stirring at 130 ° C. for 24 hours. did. After cooling to room temperature, the deposited precipitate was collected by filtration, and the resulting solid was washed with water and further washed with methanol. After drying under reduced pressure, recrystallization from n-butanol isolated 4.9 g (13.8 mmol) of white powder of 2-chloro-N- (4-biphenylyl) carbazole (yield 69%).
化合物の同定は、1H−NMR測定、13C−NMR測定により行った。 The compound was identified by 1 H-NMR measurement and 13 C-NMR measurement.
1H−NMR(CDCl3)δ(ppm); 8.07(d,1H),8.00(d,1H),7.77(d,2H),7.65(d,2H),7.54(d,2H),7.21−7.41(m,8H)
13C−NMR(CDCl3)δ(ppm); 141.38,141.18,140.72,140.08,136.17,131.75,128.99,128.66,127.74,127.27,127.16,126.23,122.82,121.99,121.19,120.47,120.29,110.05,109.98
合成例4 (N−フェニル−N−(2−(N−(4−ビフェニリル))カルバゾリル)アミンの合成)
窒素気流下、100mLの三口フラスコに合成例3で得られた2−クロロ−N−(4−ビフェニリル)カルバゾール 9.5g(26.8mmol)、アニリン 3.7g(40.2mmol)、ナトリウム−tert−ブトキシド 3.6g(37.5mmol)、o−キシレン 60mLを加え、スラリー状の反応液に酢酸パラジウム 60mg(0.26mmol)、トリ(tert−ブチル)ホスフィン 189mg(0.93mmol)を添加して130℃で10時間攪拌した。室温まで冷却後、純水を35mL添加し攪拌した。水層と有機層を分液し、有機層を純水で洗浄し、その後飽和塩化ナトリウム水溶液で洗浄した。有機層を無水硫酸マグネシウムで乾燥後、濾過によって不溶物を除去した溶液を減圧下に濃縮し茶色の固体を得た。o−キシレンで再結晶し、N−フェニル−N−(2−(N−(4−ビフェニリル))カルバゾリル)アミンの白色粉末を8.0g(19.4mmol)単離した(収率72%)。
1 H-NMR (CDCl 3 ) δ (ppm); 8.07 (d, 1H), 8.00 (d, 1H), 7.77 (d, 2H), 7.65 (d, 2H), 7 .54 (d, 2H), 7.21-7.41 (m, 8H)
13 C-NMR (CDCl 3 ) δ (ppm); 141.38, 141.18, 140.72, 140.08, 136.17, 131.75, 128.99, 128.66, 127.74, 127 .27, 127.16, 126.23, 122.82, 121.99, 121.19, 120.47, 120.29, 110.05, 109.98
Synthesis Example 4 (Synthesis of N-phenyl-N- (2- (N- (4-biphenylyl)) carbazolyl) amine)
In a 100 mL three-necked flask under a nitrogen stream, 9.5 g (26.8 mmol) of 2-chloro-N- (4-biphenylyl) carbazole obtained in Synthesis Example 3; 3.7 g (40.2 mmol) of aniline, sodium-tert -Butoxide 3.6 g (37.5 mmol) and o-xylene 60 mL were added, and palladium acetate 60 mg (0.26 mmol) and tri (tert-butyl) phosphine 189 mg (0.93 mmol) were added to the slurry reaction solution. Stir at 130 ° C. for 10 hours. After cooling to room temperature, 35 mL of pure water was added and stirred. The aqueous layer and the organic layer were separated, and the organic layer was washed with pure water and then washed with a saturated aqueous sodium chloride solution. The organic layer was dried over anhydrous magnesium sulfate, and the solution from which insolubles were removed by filtration was concentrated under reduced pressure to obtain a brown solid. Recrystallized from o-xylene, 8.0 g (19.4 mmol) of white powder of N-phenyl-N- (2- (N- (4-biphenylyl)) carbazolyl) amine was isolated (yield 72%) .
化合物の同定は、1H−NMR測定、13C−NMR測定により行った。 The compound was identified by 1 H-NMR measurement and 13 C-NMR measurement.
1H−NMR(CDCl3)δ(ppm); 7.95−8.04(m,2H),7.74(d,2H),7.18−7.66(m,12H),6.99−7.12(m,4H),6.87(t,1H),5.77(br,1H)
13C−NMR(CDCl3)δ(ppm); 143.62,142.19,141.73,141.02,140.21,136.79,129.37,128.95,128.49,127.63,127.23,127.14,124.79,123.77,121.11,120.71,120.12,119.45,118.00,117.27,112.38,109.63,99.03
合成例5 (2−(4−ブロモフェニル)−4,5−ジフェニル−1H−イミダゾールの合成)
200mLの三口フラスコに、4−ブロモベンズアルデヒド 10g(54.0mmol)、ジフェニルエタンジオン 11.3g(54.0mmol)、酢酸アンモニウム 20.8g(270.2mmol)、酢酸 100mLを加え、110℃で12時間攪拌した。室温まで冷却後、反応液を水 200mLに添加した。析出した白色粉末を濾取し、水で洗浄し、さらにメタノールで洗浄することにより、2−(4−ブロモフェニル)−4,5−ジフェニル−1H−イミダゾールの白色粉末を20.0g(53.4mmol)得た(収率98%)。
1 H-NMR (CDCl 3 ) δ (ppm); 7.95-8.04 (m, 2H), 7.74 (d, 2H), 7.18-7.66 (m, 12H), 6. 99-7.12 (m, 4H), 6.87 (t, 1H), 5.77 (br, 1H)
13 C-NMR (CDCl 3 ) δ (ppm); 143.62, 142.19, 141.73, 141.02, 140.21, 136.79, 129.37, 128.95, 128.49, 127 63, 127.23, 127.14, 124.79, 123.77, 121.11, 120.71, 120.12, 119.45, 118.00, 117.27, 112.38, 109.63 , 99.03
Synthesis Example 5 (Synthesis of 2- (4-bromophenyl) -4,5-diphenyl-1H-imidazole)
To a 200 mL three-necked flask, 10 g (54.0 mmol) of 4-bromobenzaldehyde, 11.3 g (54.0 mmol) of diphenylethanedione, 20.8 g (270.2 mmol) of ammonium acetate, and 100 mL of acetic acid were added, and 110 ° C. for 12 hours. Stir. After cooling to room temperature, the reaction solution was added to 200 mL of water. The precipitated white powder was collected by filtration, washed with water, and further washed with methanol, whereby 20.0 g (53.53 g) of white powder of 2- (4-bromophenyl) -4,5-diphenyl-1H-imidazole was obtained. 4 mmol) (yield 98%).
化合物の同定は、FDMSにより行った。 The compound was identified by FDMS.
FDMS(m/z); 374(M+)
合成例6 (1−メチル−2−(4−ブロモフェニル)−4,5−ジフェニル−イミダゾールの合成)
100mLの三口フラスコに、合成例5で得た2−(4−ブロモフェニル)−4,5−ジフェニル−1H−イミダゾール 10g(26.7mmol)、ヨードメタン 4.1g(29.3mmol)、ベンジルトリエチルアンモニウムクロリド 8.1g(29.3mmol)、48%濃度の水酸化ナトリウム水溶液 2.4g(水酸化ナトリウム固体として1.15g)、ジメチルスルホキシド 40mLを加え、70℃で3時間攪拌した。室温まで冷却後、反応液に水 40mLを添加した。析出した白色粉末を濾取し、水で洗浄し、さらにメタノールで洗浄することにより、1−メチル−2−(4−ブロモフェニル)−4,5−ジフェニル−イミダゾールの白色粉末を8.2g(21.9mmol)得た(収率81%)。
FDMS (m / z); 374 (M +)
Synthesis Example 6 (Synthesis of 1-methyl-2- (4-bromophenyl) -4,5-diphenyl-imidazole)
In a 100 mL three-necked flask, 10 g (26.7 mmol) of 2- (4-bromophenyl) -4,5-diphenyl-1H-imidazole obtained in Synthesis Example 5, 4.1 g (29.3 mmol) of iodomethane, benzyltriethylammonium 8.1 g (29.3 mmol) of chloride, 2.4 g of 48% strength sodium hydroxide aqueous solution (1.15 g as a sodium hydroxide solid) and 40 mL of dimethyl sulfoxide were added and stirred at 70 ° C. for 3 hours. After cooling to room temperature, 40 mL of water was added to the reaction solution. The precipitated white powder was collected by filtration, washed with water, and further washed with methanol, whereby 8.2 g of 1-methyl-2- (4-bromophenyl) -4,5-diphenyl-imidazole white powder ( 21.9 mmol) (yield 81%).
化合物の同定は、1H−NMR測定、13C−NMR測定により行った。 The compound was identified by 1 H-NMR measurement and 13 C-NMR measurement.
1H−NMR(CDCl3)δ(ppm); 7.61(s,4H),7.13−7.54(m,10H),3.47(s,3H) 13C−NMR(CDCl3)δ(ppm); 146.66,137.94,134.39,131.73,130.89,130.78,130.43,129.79,129.04,128.66,128.09,126.88,126.41,123.02,33.29
合成例7 (1−メチル−2−(4−ブロモフェニル)ベンゾイミダゾールの合成)
50mLの三口フラスコに、2−(4−ブロモフェニル)−1H−ベンゾイミダゾール 2g(7.3mmol)、ヨードメタン 1.1g(8.0mmol)、ベンジルトリエチルアンモニウムクロリド 2.2g(8.0mmol)、48%濃度の水酸化ナトリウム水溶液 0.6g(水酸化ナトリウム固体として0.29g)、ジメチルスルホキシド 10mLを加え、70℃で5時間攪拌した。室温まで冷却後、反応液に水 10mLを添加した。析出した白色粉末を濾取し、水で洗浄し、さらにメタノールで洗浄することにより、1−メチル−2−(4−ブロモフェニル)ベンゾイミダゾールの白色粉末を1.4g(5.1mmol)得た(収率70%)。
1 H-NMR (CDCl 3 ) δ (ppm); 7.61 (s, 4H), 7.13-7.54 (m, 10 H), 3.47 (s, 3H) 13 C-NMR (CDCl 3 ) Δ (ppm); 146.66, 137.94, 134.39, 131.73, 130.89, 130.78, 130.43, 129.79, 129.04, 128.66, 128.09, 126.88, 126.41, 123.02, 33.29
Synthesis Example 7 (Synthesis of 1-methyl-2- (4-bromophenyl) benzimidazole)
In a 50 mL three-neck flask, 2 g (7.3 mmol) of 2- (4-bromophenyl) -1H-benzimidazole, 1.1 g (8.0 mmol) of iodomethane, 2.2 g (8.0 mmol) of benzyltriethylammonium chloride, 48 A 0.6% aqueous sodium hydroxide solution (0.29 g as a sodium hydroxide solid) and 10 mL of dimethyl sulfoxide were added, and the mixture was stirred at 70 ° C. for 5 hours. After cooling to room temperature, 10 mL of water was added to the reaction solution. The precipitated white powder was collected by filtration, washed with water, and further washed with methanol to obtain 1.4 g (5.1 mmol) of white powder of 1-methyl-2- (4-bromophenyl) benzimidazole. (Yield 70%).
化合物の同定は、FDMSにより行った。 The compound was identified by FDMS.
FDMS(m/z); 286(M+)
合成例8 (1−(4−ブロモフェニル)−2−フェニルベンゾイミダゾールの合成)
窒素気流下、100mLの三口フラスコに、2−フェニル−1H−ベンゾイミダゾール 3.0g(15.4mmol)、p−ブロモヨードベンゼン 8.6g(30.8mmol)、ヨウ化銅 0.58g(3.0mmol)、炭酸セシウム 10.0g(30.8mmol)、ジメチルホルムアミド 30mLを加え、室温で30分間攪拌した。その後、120℃で36時間攪拌した。室温まで冷却後、酢酸エチルを50mL加え、不溶物を濾過した。濾液を水で洗浄し、さらに飽和食塩水で洗浄した後、減圧下に濃縮し残渣を得た。残渣をシリカゲルカラムクロマトグラフィーで精製し、1−(4−ブロモフェニル)−2−フェニルベンゾイミダゾールの白色粉末を1.7g(4.9mmol)単離した(収率32%)。
FDMS (m / z); 286 (M +)
Synthesis Example 8 (Synthesis of 1- (4-bromophenyl) -2-phenylbenzimidazole)
Under a nitrogen stream, in a 100 mL three-necked flask, 3.0 g (15.4 mmol) of 2-phenyl-1H-benzimidazole, 8.6 g (30.8 mmol) of p-bromoiodobenzene, 0.58 g of copper iodide (3. 0 mmol), 10.0 g (30.8 mmol) of cesium carbonate, and 30 mL of dimethylformamide were added, and the mixture was stirred at room temperature for 30 minutes. Then, it stirred at 120 degreeC for 36 hours. After cooling to room temperature, 50 mL of ethyl acetate was added, and insoluble matters were filtered. The filtrate was washed with water and further washed with saturated brine, and then concentrated under reduced pressure to obtain a residue. The residue was purified by silica gel column chromatography, and 1.7 g (4.9 mmol) of white powder of 1- (4-bromophenyl) -2-phenylbenzimidazole was isolated (yield 32%).
化合物の同定は、FDMSにより行った。 The compound was identified by FDMS.
FDMS(m/z); 348(M+)
実施例1 (化合物(A2)の合成)
窒素気流下、200mLの三口フラスコに、合成例2で得た2−クロロカルバゾール 7.8g(39.0mmol)、4−(2−ピリジル)ブロモベンゼン 9.0g(39.0mmol)、炭酸カリウム 7.5g(54.6mmol)、o−キシレン 75mLを加え、スラリー状の反応液に酢酸パラジウム 87mg(0.39mmol)、トリ(tert−ブチル)ホスフィン 275mg(1.3mmol)を添加して130℃で15時間攪拌した。室温まで冷却後、水 30mLを加え、有機層を分離した。有機層を水で洗浄し、さらに飽和食塩水で洗浄した後、無水硫酸マグネシウムで乾燥し、濾過して不溶物を除去した。濾過で得られた溶液を200mLの三口フラスコに仕込んだ。溶液に、N,N−ビス(4−ビフェニリル)アミン 12.5g(39.0mmol)、ナトリウム−tert−ブトキシド 5.2g(54.6mmol)、酢酸パラジウム 87mg(0.39mmol)、トリ(tert−ブチル)ホスフィン 275mg(1.36mmol)を添加して130℃で8時間攪拌した。室温まで冷却後、水 30mLを加えた。析出した沈殿を濾取し、得られた沈殿物を水で洗浄し、さらにエタノールで洗浄した。減圧乾燥した後、o−キシレンで再結晶し、化合物(A2)の白色粉末を17.9g(28.0mmol)単離した(収率72%)。
FDMS (m / z); 348 (M +)
Example 1 (Synthesis of Compound (A2))
In a 200 mL three-necked flask under a nitrogen stream, 7.8 g (39.0 mmol) of 2-chlorocarbazole obtained in Synthesis Example 2, 9.0 g (39.0 mmol) of 4- (2-pyridyl) bromobenzene, potassium carbonate 7 0.5 g (54.6 mmol) and 75 mL of o-xylene were added, and 87 mg (0.39 mmol) of palladium acetate and 275 mg (1.3 mmol) of tri (tert-butyl) phosphine were added to the slurry reaction solution at 130 ° C. Stir for 15 hours. After cooling to room temperature, 30 mL of water was added and the organic layer was separated. The organic layer was washed with water and further washed with saturated brine, dried over anhydrous magnesium sulfate, and filtered to remove insolubles. The solution obtained by filtration was charged into a 200 mL three-necked flask. To the solution, 12.5 g (39.0 mmol) of N, N-bis (4-biphenylyl) amine, 5.2 g (54.6 mmol) of sodium-tert-butoxide, 87 mg (0.39 mmol) of palladium acetate, tri (tert- (Butyl) phosphine (275 mg, 1.36 mmol) was added and the mixture was stirred at 130 ° C. for 8 hours. After cooling to room temperature, 30 mL of water was added. The deposited precipitate was collected by filtration, and the obtained precipitate was washed with water and further washed with ethanol. After drying under reduced pressure, it was recrystallized from o-xylene to isolate 17.9 g (28.0 mmol) of white powder of compound (A2) (yield 72%).
化合物の同定は、FDMS、1H−NMR測定、13C−NMR測定により行った。 The compound was identified by FDMS, 1 H-NMR measurement, and 13 C-NMR measurement.
FDMS(m/z); 639(M+)
1H−NMR(CDCl3)δ(ppm); 8.63(d, 1H),8.13(d, 2H),8.05(d, 2H),7.73(d, 2H),7.54−7.62(m, 6H),7.10−7.49(m, 20H)
13C−NMR(CDCl3)δ(ppm); 156.38,149.70,147.26,146.02,141.66,141.18,140.60,138.23,138.09,136.88,134.96,128.69,128.42,127.72,126.92,126.73,126.62,125.47,123.64,123.44,122.34,121.13,120.56,120.36,119.94,119.85,119.03,109.80,106.92
実施例2 (化合物(A45)の合成)
窒素気流下、100mLの三口フラスコに、合成例2で得た2−クロロカルバゾール 3.2g(16.0mmol)、合成例6で得た1−メチル−2−(4−ブロモフェニル)−4,5−ジフェニル−イミダゾール 6.0g(16.0mmol)、炭酸カリウム 3.1g(22.4mmol)、o−キシレン 40mLを加え、スラリー状の反応液に酢酸パラジウム 35mg(0.16mmol)、トリ(tert−ブチル)ホスフィン 113mg(0.56mmol)を添加して130℃で20時間攪拌した。室温まで冷却後、水 20mLを加え、有機層を分離した。有機層を水で洗浄し、さらに飽和食塩水で洗浄した後、無水硫酸マグネシウムで乾燥し、濾過して不溶物を除去した。濾過で得られた溶液を100mLの三口フラスコに仕込んだ。溶液に、N−(4−ビフェニリル)−N−(p−トリル)アミン 4.1g(16.0mmol)、ナトリウム−tert−ブトキシド 2.1g(22.4mmol)、酢酸パラジウム 35mg(0.16mmol)、トリ(tert−ブチル)ホスフィン 113mg(0.56mmol)を添加して130℃で4時間攪拌した。室温まで冷却後、水 20mLを加えた。析出した沈殿を濾取し、得られた沈殿物を水で洗浄した、さらにエタノールで洗浄した。減圧乾燥した後、o−キシレンで再結晶し、化合物(A45)の淡黄色粉末を7.90g(10.8mmol)単離した(収率68%)。
FDMS (m / z); 639 (M +)
1 H-NMR (CDCl 3 ) δ (ppm); 8.63 (d, 1H), 8.13 (d, 2H), 8.05 (d, 2H), 7.73 (d, 2H), 7 .54-7.62 (m, 6H), 7.10-7.49 (m, 20H)
13 C-NMR (CDCl 3 ) δ (ppm); 156.38, 149.70, 147.26, 146.02, 141.66, 141.18, 140.60, 138.23, 138.09, 136 88, 134.96, 128.69, 128.42, 127.72, 126.92, 126.73, 126.62, 125.47, 123.64, 123.44, 122.34, 121.13 120.56, 120.36, 119.94, 119.85, 119.03, 109.80, 106.92.
Example 2 (Synthesis of Compound (A45))
In a 100 mL three-necked flask under a nitrogen stream, 3.2 g (16.0 mmol) of 2-chlorocarbazole obtained in Synthesis Example 2 and 1-methyl-2- (4-bromophenyl) -4, obtained in Synthesis Example 6 were obtained. 6.0 g (16.0 mmol) of 5-diphenyl-imidazole, 3.1 g (22.4 mmol) of potassium carbonate, and 40 mL of o-xylene were added, and 35 mg (0.16 mmol) of palladium acetate was added to the slurry reaction solution. -Butyl) phosphine 113 mg (0.56 mmol) was added and stirred at 130 ° C. for 20 hours. After cooling to room temperature, 20 mL of water was added and the organic layer was separated. The organic layer was washed with water and further washed with saturated brine, dried over anhydrous magnesium sulfate, and filtered to remove insolubles. The solution obtained by filtration was charged into a 100 mL three-necked flask. To the solution, 4.1 g (16.0 mmol) of N- (4-biphenylyl) -N- (p-tolyl) amine, 2.1 g (22.4 mmol) of sodium tert-butoxide, 35 mg (0.16 mmol) of palladium acetate Then, 113 mg (0.56 mmol) of tri (tert-butyl) phosphine was added and stirred at 130 ° C. for 4 hours. After cooling to room temperature, 20 mL of water was added. The deposited precipitate was collected by filtration, and the resulting precipitate was washed with water and further washed with ethanol. After drying under reduced pressure, recrystallization from o-xylene was performed to isolate 7.90 g (10.8 mmol) of a pale yellow powder of compound (A45) (yield 68%).
化合物の同定は、FDMSにより行った。 The compound was identified by FDMS.
FDMS(m/z); 732(M+)
実施例3 (化合物(A52)の合成)
窒素気流下、200mLの三口フラスコに、合成例2で得た2−クロロカルバゾール 5.0g(24.7mmol)、合成例7で得た1−メチル−2−(4−ブロモフェニル)ベンゾイミダゾール 7.0g(24.7mmol)、炭酸カリウム 4.8g(34.7mmol)、o−キシレン 75mLを加え、スラリー状の反応液に酢酸パラジウム 55mg(0.24mmol)、トリ(tert−ブチル)ホスフィン 174mg(0.86mmol)を添加して130℃で18時間攪拌した。室温まで冷却後、水 30mLを加え、有機層を分離した。有機層を水で洗浄し、さらに飽和食塩水で洗浄した後、無水硫酸マグネシウムで乾燥し、濾過により不溶物を除去した。濾過で得られた溶液を200mLの三口フラスコに仕込んだ。溶液に、N,N−ビス(4−ビフェニリル)アミン 7.9g(24.7mmol)、ナトリウム−tert−ブトキシド 3.3g(34.5mmol)、酢酸パラジウム 55mg(0.24mmol)、トリ(tert−ブチル)ホスフィン 174mg(0.86mmol)を添加して130℃で5時間攪拌した。室温まで冷却後、水 30mLを加えた。析出した沈殿を濾取し、得られた沈殿物を水で洗浄し、さらにエタノールで洗浄した。減圧乾燥した後、o−キシレンで再結晶し、化合物(A52)の淡黄色粉末を10.2g(14.8mmol)単離した(収率60%)。
FDMS (m / z); 732 (M +)
Example 3 (Synthesis of Compound (A52))
In a 200 mL three-necked flask under a nitrogen stream, 5.0 g (24.7 mmol) of 2-chlorocarbazole obtained in Synthesis Example 2 and 1-methyl-2- (4-bromophenyl) benzimidazole obtained in Synthesis Example 7 7 0.0 g (24.7 mmol), 4.8 g (34.7 mmol) of potassium carbonate, and 75 mL of o-xylene are added, and 55 mg (0.24 mmol) of palladium acetate and 174 mg of tri (tert-butyl) phosphine are added to the slurry reaction solution. 0.86 mmol) was added and stirred at 130 ° C. for 18 hours. After cooling to room temperature, 30 mL of water was added and the organic layer was separated. The organic layer was washed with water, further washed with saturated brine, dried over anhydrous magnesium sulfate, and insolubles were removed by filtration. The solution obtained by filtration was charged into a 200 mL three-necked flask. To the solution, 7.9 g (24.7 mmol) of N, N-bis (4-biphenylyl) amine, 3.3 g (34.5 mmol) of sodium-tert-butoxide, 55 mg (0.24 mmol) of palladium acetate, tri (tert- 174 mg (0.86 mmol) of butyl) phosphine was added and stirred at 130 ° C. for 5 hours. After cooling to room temperature, 30 mL of water was added. The deposited precipitate was collected by filtration, and the obtained precipitate was washed with water and further washed with ethanol. After drying under reduced pressure, recrystallization from o-xylene was performed to isolate 10.2 g (14.8 mmol) of a pale yellow powder of compound (A52) (yield 60%).
化合物の同定は、FDMSにより行った。 The compound was identified by FDMS.
FDMS(m/z); 692(M+)
実施例4 (化合物(A57)の合成)
窒素気流下、50mLの三口フラスコに、合成例2で得た2−クロロカルバゾール 2.0g(7.2mmol)、合成例8で得た1−(4−ブロモフェニル)−2−フェニルベンゾイミダゾール 2.5g(7.2mmol)、炭酸カリウム 1.4g(10.1mmol)、o−キシレン 20mLを加え、スラリー状の反応液に酢酸パラジウム 16mg(0.07mmol)、トリ(tert−ブチル)ホスフィン 49mg(0.24mmol)を添加して130℃で18時間攪拌した。室温まで冷却後、水 10mLを加え、有機層を分離した。有機層を水で洗浄し、さらに飽和食塩水で洗浄した後、無水硫酸マグネシウムで乾燥し、濾過により不溶物を除去した。濾過で得られた溶液を50mLの三口フラスコに仕込んだ。溶液に、N−(4−ビフェニリル)−N−(p−トリル)アミン 1.8g(7.2mmol)、ナトリウム−tert−ブトキシド 968mg(10.1mmol)、酢酸パラジウム 16mg(0.07mmol)、トリ(tert−ブチル)ホスフィン 49mg(0.24mmol)を添加して130℃で6時間攪拌した。室温まで冷却後、水 10mLを加えた。析出した沈殿を濾取し、得られた沈殿物を水で洗浄し、さらにエタノールで洗浄した。減圧乾燥した後、o−キシレンで再結晶し、化合物(A57)の白色粉末を3.2g(4.7mmol)単離した(収率
66%)。
FDMS (m / z); 692 (M +)
Example 4 (Synthesis of Compound (A57))
In a 50 mL three-necked flask under a nitrogen stream, 2.0 g (7.2 mmol) of 2-chlorocarbazole obtained in Synthesis Example 2 and 1- (4-bromophenyl) -2-phenylbenzimidazole obtained in Synthesis Example 8 2 0.5 g (7.2 mmol), 1.4 g (10.1 mmol) of potassium carbonate and 20 mL of o-xylene were added, and 16 mg (0.07 mmol) of palladium acetate and 49 mg of tri (tert-butyl) phosphine were added to the slurry reaction solution. 0.24 mmol) was added and stirred at 130 ° C. for 18 hours. After cooling to room temperature, 10 mL of water was added and the organic layer was separated. The organic layer was washed with water, further washed with saturated brine, dried over anhydrous magnesium sulfate, and insolubles were removed by filtration. The solution obtained by filtration was charged into a 50 mL three-necked flask. To the solution, 1.8 g (7.2 mmol) of N- (4-biphenylyl) -N- (p-tolyl) amine, 968 mg (10.1 mmol) of sodium tert-butoxide, 16 mg (0.07 mmol) of palladium acetate, 49 mg (0.24 mmol) of (tert-butyl) phosphine was added and stirred at 130 ° C. for 6 hours. After cooling to room temperature, 10 mL of water was added. The deposited precipitate was collected by filtration, and the obtained precipitate was washed with water and further washed with ethanol. After drying under reduced pressure, it was recrystallized from o-xylene to isolate 3.2 g (4.7 mmol) of white powder of compound (A57) (yield 66%).
化合物の同定は、FDMSにより行った。 The compound was identified by FDMS.
FDMS(m/z); 692(M+)
実施例5 (化合物(A59)の合成)
窒素気流下、100mLの三口フラスコに、合成例2で得た2−クロロカルバゾール 6.9g(34.4mmol)、4−(2−ベンゾチアゾリル)ブロモベンゼン 10.0g(34.4mmol)、炭酸カリウム 6.6g(48.1mmol)、o−キシレン 60mLを加え、スラリー状の反応液に酢酸パラジウム 77mg(0.34mmol)、トリ(tert−ブチル)ホスフィン 243mg(1.2mmol)を添加して130℃で20時間攪拌した。室温まで冷却後、水 30mLを加え、有機層を分離した。有機層を水で洗浄し、さらに飽和食塩水で洗浄した後、無水硫酸マグネシウムで乾燥し、濾過により不溶物を除去した。濾過で得られた溶液を50mLの三口フラスコに仕込んだ。溶液に、N,N−ビス(4−ビフェニリル)アミン 11.0g(34.4mmol)、ナトリウム−tert−ブトキシド 4.6g(48.1mmol)、酢酸パラジウム 77mg(0.34mmol)、トリ(tert−ブチル)ホスフィン 243mg(1.2mmol)を添加して130℃で5時間攪拌した。室温まで冷却後、水 20mLを加えた。析出した沈殿を濾取し、得られた沈殿物を水で洗浄し、さらにエタノールで洗浄した。減圧乾燥した後、o−キシレンで再結晶し、化合物(A59)の淡黄色粉末を18.8g(27.1mmol)単離した(収率79%)。化合物の同定は、FDMSにより行った。
FDMS (m / z); 692 (M +)
Example 5 (Synthesis of Compound (A59))
Under a nitrogen stream, in a 100 mL three-necked flask, 6.9 g (34.4 mmol) of 2-chlorocarbazole obtained in Synthesis Example 2, 10.0 g (34.4 mmol) of 4- (2-benzothiazolyl) bromobenzene, potassium carbonate 6 .6 g (48.1 mmol) and o-xylene 60 mL were added, and 77 mg (0.34 mmol) of palladium acetate and 243 mg (1.2 mmol) of tri (tert-butyl) phosphine were added to the slurry reaction solution at 130 ° C. Stir for 20 hours. After cooling to room temperature, 30 mL of water was added and the organic layer was separated. The organic layer was washed with water, further washed with saturated brine, dried over anhydrous magnesium sulfate, and insolubles were removed by filtration. The solution obtained by filtration was charged into a 50 mL three-necked flask. To the solution, 11.0 g (34.4 mmol) of N, N-bis (4-biphenylyl) amine, 4.6 g (48.1 mmol) of sodium-tert-butoxide, 77 mg (0.34 mmol) of palladium acetate, tri (tert- 243 mg (1.2 mmol) of butyl) phosphine was added and stirred at 130 ° C. for 5 hours. After cooling to room temperature, 20 mL of water was added. The deposited precipitate was collected by filtration, and the obtained precipitate was washed with water and further washed with ethanol. After drying under reduced pressure, recrystallization from o-xylene was performed to isolate 18.8 g (27.1 mmol) of a pale yellow powder of compound (A59) (yield 79%). The compound was identified by FDMS.
FDMS(m/z); 695(M+)
実施例6 (化合物(B3)の合成)
窒素気流下、50mLの三口フラスコに、合成例4で得たN−フェニル−N−(2−(N−(4−ビフェニリル))カルバゾリル)アミン 3.0g(7.3mmol)、4−(2−ピリジル)ブロモベンゼン 1.7g(7.3mmol)、ナトリウム−tert−ブトキシド 0.98g(10.2mmol)、o−キシレン 15mLを加え、スラリー状の反応液に酢酸パラジウム 16mg(0.07mmol)、トリ(tert−ブチル)ホスフィン 49mg(0.24mmol)を添加して130℃で5時間攪拌した。室温まで冷却後、水 10mLを加え、有機層を分離した。有機層を水で洗浄し、さらに飽和食塩水で洗浄した後、無水硫酸マグネシウムで乾燥し、濾過によって不溶物を除去した溶液を減圧下に濃縮した。得られた残渣をシリカゲルカラムクロマトグラフィー(トルエンとヘキサンの混合溶媒)で精製し、化合物(B3)のガラス状固体を3.4g(6.2mmol)単離した(収率85%)。
FDMS (m / z); 695 (M +)
Example 6 (Synthesis of Compound (B3))
N-phenyl-N- (2- (N- (4-biphenylyl)) carbazolyl) amine 3.0 g (7.3 mmol), 4- (2) obtained in Synthesis Example 4 was placed in a 50 mL three-necked flask under a nitrogen stream. -Pyridyl) bromobenzene 1.7 g (7.3 mmol), sodium-tert-butoxide 0.98 g (10.2 mmol), o-xylene 15 mL were added, and the slurry reaction solution was added with palladium acetate 16 mg (0.07 mmol), 49 mg (0.24 mmol) of tri (tert-butyl) phosphine was added and stirred at 130 ° C. for 5 hours. After cooling to room temperature, 10 mL of water was added and the organic layer was separated. The organic layer was washed with water, further washed with saturated brine, dried over anhydrous magnesium sulfate, and the solution from which insoluble materials were removed by filtration was concentrated under reduced pressure. The obtained residue was purified by silica gel column chromatography (a mixed solvent of toluene and hexane), and 3.4 g (6.2 mmol) of a glassy solid of compound (B3) was isolated (yield 85%).
化合物の同定は、FDMSにより行った。 The compound was identified by FDMS.
FDMS(m/z); 563(M+)
実施例7 (化合物(B10)の合成)
窒素気流下、50mLの三口フラスコに、合成例4で得たN−フェニル−N−(2−(N−(4−ビフェニリル))カルバゾリル)アミン 0.90g(2.2mmol)、合成例7で得た1−メチル−2−(4−ブロモフェニル)ベンゾイミダゾール 0.62g(2.2mmol)、ナトリウム−tert−ブトキシド 0.28g(3.0mmol)、o−キシレン 10mLを加え、スラリー状の反応液に酢酸パラジウム 5mg(0.02mmol)、トリ(tert−ブチル)ホスフィン 14mg(0.07mmol)を添加して130℃で5時間攪拌した。室温まで冷却後、水 5mLを加え、有機層を分離した。有機層を水で洗浄し、さらに飽和食塩水で洗浄した後、無水硫酸マグネシウムで乾燥し、濾過によって不溶物を除去した。濾過で得られた溶液を減圧下に濃縮した。残渣をシリカゲルカラムクロマトグラフィー(トルエンとヘキサンの混合溶媒)で精製し、化合物(B10)のガラス状固体を0.92g(1.5mmol)単離した(収率72%)。
FDMS (m / z); 563 (M +)
Example 7 (Synthesis of Compound (B10))
In a 50 mL three-necked flask under a nitrogen stream, 0.90 g (2.2 mmol) of N-phenyl-N- (2- (N- (4-biphenylyl)) carbazolyl) amine obtained in Synthesis Example 4 was used. 0.62 g (2.2 mmol) of 1-methyl-2- (4-bromophenyl) benzimidazole obtained, 0.28 g (3.0 mmol) of sodium-tert-butoxide, and 10 mL of o-xylene were added to form a slurry reaction. To the solution, 5 mg (0.02 mmol) of palladium acetate and 14 mg (0.07 mmol) of tri (tert-butyl) phosphine were added and stirred at 130 ° C. for 5 hours. After cooling to room temperature, 5 mL of water was added and the organic layer was separated. The organic layer was washed with water, further washed with saturated brine, dried over anhydrous magnesium sulfate, and insolubles were removed by filtration. The solution obtained by filtration was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (a mixed solvent of toluene and hexane), and 0.92 g (1.5 mmol) of a glassy solid of compound (B10) was isolated (yield 72%).
化合物の同定は、FDMSにより行った。 The compound was identified by FDMS.
FDMS(m/z); 616(M+)
実施例8 (化合物(B13)の合成)
窒素気流下、50mLの三口フラスコに、合成例4で得たN−フェニル−N−(2−(N−(4−ビフェニリル))カルバゾリル)アミン 0.82g(2.0mmol)、合成例8で得た1−(4−ブロモフェニル)−2−フェニルベンゾイミダゾール 0.69g(2.0mmol)、ナトリウム−tert−ブトキシド 0.27g(2.8mmol)、o−キシレン 10mLを加え、スラリー状の反応液に酢酸パラジウム 5mg(0.02mmol)、トリ(tert−ブチル)ホスフィン 14mg(0.07mmol)を添加して130℃で5時間攪拌した。室温まで冷却後、水 5mLを加え、有機層を分離した。有機層を水で洗浄し、さらに飽和食塩水で洗浄した後、無水硫酸マグネシウムで乾燥し、濾過によって不溶物を除去した。濾過で得られた溶液を減圧下に濃縮した。残渣をシリカゲルカラムクロマトグラフィー(トルエンとヘキサンの混合溶媒)で精製し、化合物(B13)のガラス状固体を0.82g(1.2mmol)単離した(収率60%)。
FDMS (m / z); 616 (M +)
Example 8 (Synthesis of Compound (B13))
In a 50 mL three-neck flask under a nitrogen stream, 0.82 g (2.0 mmol) of N-phenyl-N- (2- (N- (4-biphenylyl)) carbazolyl) amine obtained in Synthesis Example 4 was used. 0.69 g (2.0 mmol) of 1- (4-bromophenyl) -2-phenylbenzimidazole obtained, 0.27 g (2.8 mmol) of sodium-tert-butoxide and 10 mL of o-xylene were added, and the reaction in a slurry state To the solution, 5 mg (0.02 mmol) of palladium acetate and 14 mg (0.07 mmol) of tri (tert-butyl) phosphine were added and stirred at 130 ° C. for 5 hours. After cooling to room temperature, 5 mL of water was added and the organic layer was separated. The organic layer was washed with water, further washed with saturated brine, dried over anhydrous magnesium sulfate, and insolubles were removed by filtration. The solution obtained by filtration was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (a mixed solvent of toluene and hexane), and 0.82 g (1.2 mmol) of a glassy solid of compound (B13) was isolated (yield 60%).
化合物の同定は、FDMSにより行った。 The compound was identified by FDMS.
FDMS(m/z); 678(M+)
実施例9 (化合物(B14)の合成)
窒素気流下、50mLの三口フラスコに、合成例4で得たN−フェニル−N−(2−(N−(4−ビフェニリル))カルバゾリル)アミン 1.5g(3.6mmol)、合成例6で得た1−メチル−2−(4−ブロモフェニル)−4,5−ジフェニル−イミダゾール 1.3g(3.6mmol)、ナトリウム−tert−ブトキシド 0.48g(5.0mmol)、o−キシレン 15mLを加え、スラリー状の反応液に酢酸パラジウム 7mg(0.03mmol)、トリ(tert−ブチル)ホスフィン 21mg(0.10mmol)を添加して130℃で7時間攪拌した。室温まで冷却後、水 10mLを加え、有機層を分離した。有機層を水で洗浄し、飽和食塩水で洗浄した後、無水硫酸マグネシウムで乾燥し、濾過によって不溶物を除去した。濾過で得られた溶液を減圧下に濃縮した。残渣をシリカゲルカラムクロマトグラフィー(トルエンとヘキサンの混合溶媒)で精製し、化合物(B14)のガラス状固体を2.0g(2.8mmol)単離した(収率79%)。
FDMS (m / z); 678 (M +)
Example 9 (Synthesis of Compound (B14))
In a 50 mL three-necked flask under a nitrogen stream, 1.5 g (3.6 mmol) of N-phenyl-N- (2- (N- (4-biphenylyl)) carbazolyl) amine obtained in Synthesis Example 4 was used. Obtained 1-methyl-2- (4-bromophenyl) -4,5-diphenyl-imidazole 1.3 g (3.6 mmol), sodium tert-butoxide 0.48 g (5.0 mmol), o-xylene 15 mL. In addition, 7 mg (0.03 mmol) of palladium acetate and 21 mg (0.10 mmol) of tri (tert-butyl) phosphine were added to the slurry reaction solution, and the mixture was stirred at 130 ° C. for 7 hours. After cooling to room temperature, 10 mL of water was added and the organic layer was separated. The organic layer was washed with water, washed with saturated brine, dried over anhydrous magnesium sulfate, and insolubles were removed by filtration. The solution obtained by filtration was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (a mixed solvent of toluene and hexane), and 2.0 g (2.8 mmol) of a glassy solid of compound (B14) was isolated (yield 79%).
化合物の同定は、FDMSにより行った。 The compound was identified by FDMS.
FDMS(m/z); 718(M+)
実施例10 (化合物(B19)の合成)
窒素気流下、50mLの三口フラスコに、合成例4で得たN−フェニル−N−(2−(N−(4−ビフェニリル))カルバゾリル)アミン 3.7g(9.0mmol)、4−(2−ベンゾチアゾリル)ブロモベンゼン 2.6g(9.0mmol)、ナトリウム−tert−ブトキシド 1.2g(12.6mmol)、o−キシレン 25mLを加え、スラリー状の反応液に酢酸パラジウム 20mg(0.09mmol)、トリ(tert−ブチル)ホスフィン 63mg(0.31mmol)を添加して130℃で5時間攪拌した。室温まで冷却後、水 10mLを加え、有機層を分離した。有機層を水で洗浄し、さらに飽和食塩水で洗浄した後、無水硫酸マグネシウムで乾燥し、濾過によって不溶物を除去した。濾過で得られた溶液を減圧下に濃縮した。残渣をシリカゲルカラムクロマトグラフィー(トルエンとヘキサンの混合溶媒)で精製し、化合物(B19)のガラス状固体を4.5g(7.3mmol)単離した(収率82%)。
FDMS (m / z); 718 (M +)
Example 10 (Synthesis of Compound (B19))
In a 50 mL three-necked flask under a nitrogen stream, 3.7 g (9.0 mmol) of 4-N2 (N-phenyl-N- (2- (N- (4-biphenylyl)) carbazolyl) amine obtained in Synthesis Example 4 was obtained. -Benzothiazolyl) bromobenzene 2.6 g (9.0 mmol), sodium-tert-butoxide 1.2 g (12.6 mmol), o-xylene 25 mL were added, and 20 mg (0.09 mmol) of palladium acetate was added to the slurry reaction solution. Tri (tert-butyl) phosphine 63 mg (0.31 mmol) was added, and the mixture was stirred at 130 ° C. for 5 hours. After cooling to room temperature, 10 mL of water was added and the organic layer was separated. The organic layer was washed with water, further washed with saturated brine, dried over anhydrous magnesium sulfate, and insolubles were removed by filtration. The solution obtained by filtration was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (a mixed solvent of toluene and hexane), and 4.5 g (7.3 mmol) of a glassy solid of compound (B19) was isolated (yield 82%).
化合物の同定は、FDMSにより行った。 The compound was identified by FDMS.
FDMS(m/z); 619(M+)
実施例11 (化合物(A2)の還元特性評価)
過塩素酸テトラブチルアンモニウムの濃度が0.1mol/Lである無水テトラヒドロフラン溶液に、化合物(A2)を0.001mol/Lの濃度で溶解させ、サイクリックボルタンメトリーで還元電位を測定した。作用電極にはグラッシーカーボン、対極に白金線、参照電極にAgNO3のアセトニトリル溶液に浸した銀線を用いた。化合物(A2)は、フェロセンの酸化還元電位を基準として−2.88V vs.Fc/Fc+に還元波が観測され、電子受容性を有することが確認された。
FDMS (m / z); 619 (M +)
Example 11 (Reduction characteristic evaluation of compound (A2))
Compound (A2) was dissolved at a concentration of 0.001 mol / L in an anhydrous tetrahydrofuran solution having a tetrabutylammonium perchlorate concentration of 0.1 mol / L, and the reduction potential was measured by cyclic voltammetry. Glassy carbon was used for the working electrode, platinum wire was used for the counter electrode, and silver wire immersed in an acetonitrile solution of AgNO 3 was used for the reference electrode. Compound (A2) has a concentration of -2.88 V vs. ferrocene based on the redox potential of ferrocene. Reduction waves were observed in Fc / Fc + , confirming electron acceptability.
実施例12 (化合物(A45)の還元特性評価)
実施例11において、化合物(A2)の代わりに化合物(A45)を用いた他は、実施例11と同じ方法で還元特性を評価したところ、化合物(A45)は、フェロセンの酸化還元電位を基準として−2.98V vs.Fc/Fc+に還元波が観測され、電子受容性を有することが確認された。
Example 12 (Reduction characteristic evaluation of compound (A45))
In Example 11, except that the compound (A45) was used instead of the compound (A2), the reduction characteristics were evaluated by the same method as in Example 11. As a result, the compound (A45) was determined based on the oxidation-reduction potential of ferrocene. -2.98V vs. Reduction waves were observed in Fc / Fc + , confirming electron acceptability.
実施例13 (化合物(A52)の還元特性評価)
実施例11において、化合物(A2)の代わりに化合物(A52)を用いた他は、実施例11と同じ方法で還元特性を評価したところ、化合物(A52)は、フェロセンの酸化還元電位を基準として−2.93V vs.Fc/Fc+に還元波が観測され、電子受容性を有することが確認された。
Example 13 (Reduction characteristic evaluation of compound (A52))
In Example 11, except that the compound (A52) was used instead of the compound (A2), the reduction characteristics were evaluated by the same method as in Example 11. As a result, the compound (A52) was based on the oxidation-reduction potential of ferrocene. -2.93V vs. Reduction waves were observed in Fc / Fc + , confirming electron acceptability.
実施例14 (化合物(A57)の還元特性評価)
実施例11において、化合物(A2)の代わりに化合物(A57)を用いた他は、実施例11と同じ方法で還元特性を評価したところ、化合物(A57)は、フェロセンの酸化還元電位を基準として−2.95V vs.Fc/Fc+に還元波が観測され、電子受容性を有することが確認された。
Example 14 (Reduction characteristic evaluation of compound (A57))
In Example 11, except that the compound (A57) was used instead of the compound (A2), the reduction characteristics were evaluated by the same method as in Example 11. As a result, the compound (A57) was based on the oxidation-reduction potential of ferrocene. -2.95V vs. Reduction waves were observed in Fc / Fc + , confirming electron acceptability.
実施例15 (化合物(A59)の還元特性評価)
実施例11において、化合物(A2)の代わりに化合物(A59)を用いた他は、実施例11と同じ方法で還元特性を評価したところ、化合物(A59)は、フェロセンの酸化還元電位を基準として−2.48V vs.Fc/Fc+に還元波が観測され、電子受容性を有することが確認された。サイクリックボルタンメトリー測定の結果を図1に示す。
Example 15 (Reduction characteristic evaluation of compound (A59))
In Example 11, except that the compound (A59) was used instead of the compound (A2), the reduction characteristics were evaluated by the same method as in Example 11. As a result, the compound (A59) was based on the oxidation-reduction potential of ferrocene. -2.48V vs.. Reduction waves were observed in Fc / Fc + , confirming electron acceptability. The results of cyclic voltammetry measurement are shown in FIG.
実施例16 (化合物(B3)の還元特性評価)
実施例11において、化合物(A2)の代わりに化合物(B3)を用いた他は、実施例11と同じ方法で還元特性を評価したところ、化合物(B3)は、フェロセンの酸化還元電位を基準として−3.08V vs.Fc/Fc+に還元波が観測され、電子受容性を有することが確認された。
Example 16 (Reduction characteristic evaluation of compound (B3))
In Example 11, except that the compound (B3) was used instead of the compound (A2), the reduction characteristics were evaluated by the same method as in Example 11. As a result, the compound (B3) was based on the oxidation-reduction potential of ferrocene. -3.08V vs. Reduction waves were observed in Fc / Fc + , confirming electron acceptability.
実施例17 (化合物(B13)の還元特性評価)
実施例11において、化合物(A2)の代わりに化合物(B13)を用いた他は、実施例11と同じ方法で還元特性を評価したところ、化合物(B13)は、フェロセンの酸化還元電位を基準として−3.15V vs.Fc/Fc+に還元波が観測され、電子受容性を有することが確認された。
Example 17 (Reduction characteristic evaluation of compound (B13))
In Example 11, except that the compound (B13) was used instead of the compound (A2), the reduction characteristics were evaluated by the same method as in Example 11. As a result, the compound (B13) was based on the oxidation-reduction potential of ferrocene. -3.15 V vs. Reduction waves were observed in Fc / Fc + , confirming electron acceptability.
実施例18 (化合物(B14)の還元特性評価)
実施例11において、化合物(A2)の代わりに化合物(B14)を用いた他は、実施例11と同じ方法で還元特性を評価したところ、化合物(B14)は、フェロセンの酸化還元電位を基準として−3.18V vs.Fc/Fc+に還元波が観測され、電子受容性を有することが確認された。
Example 18 (Reduction characteristic evaluation of compound (B14))
In Example 11, except that the compound (B14) was used instead of the compound (A2), the reduction characteristics were evaluated by the same method as in Example 11. As a result, the compound (B14) was based on the oxidation-reduction potential of ferrocene. -3.18V vs. Reduction waves were observed in Fc / Fc + , confirming electron acceptability.
実施例19 (化合物(B19)の還元特性評価)
実施例11において、化合物(A2)の代わりに化合物(B19)を用いた他は、実施例11と同じ方法で還元特性を評価したところ、化合物(B19)は、フェロセンの酸化還元電位を基準として−2.75V vs.Fc/Fc+に還元波が観測され、電子受容性を有することが確認された。
Example 19 (Reduction characteristic evaluation of compound (B19))
In Example 11, except that the compound (B19) was used instead of the compound (A2), the reduction characteristics were evaluated by the same method as in Example 11. As a result, the compound (B19) was based on the oxidation-reduction potential of ferrocene. -2.75V vs. Reduction waves were observed in Fc / Fc + , confirming electron acceptability.
比較例1 (比較化合物(a)の還元特性評価)
実施例11において、化合物(A2)の代わりに化合物(a)を用いた他は、実施例11と同じ方法で還元特性を評価したところ、化合物(a)は、フェロセンの酸化還元電位を基準として−3.30V vs.Fc/Fc+まで走引したが、還元波は観測されなかった。
Comparative Example 1 (Reduction characteristic evaluation of comparative compound (a))
In Example 11, except that the compound (a) was used in place of the compound (A2), the reduction characteristics were evaluated by the same method as in Example 11. As a result, the compound (a) was based on the oxidation-reduction potential of ferrocene. -3.30V vs. Although it ran to Fc / Fc + , no reduction wave was observed.
実施例20 (化合物(A2)の素子評価)
厚さ200nmのITO透明電極(陽極)を積層したガラス基板を、アセトン及び純水による超音波洗浄、イソプロピルアルコールによる沸騰洗浄を行なった。さらに、紫外線/オゾン洗浄を行ない、真空蒸着装置へ設置後、1×10−4Paになるまで真空ポンプにて排気した。まず、ITO透明電極上にNPDを蒸着速度0.3nm/秒で蒸着し、20nmの正孔注入層とした。引続き、化合物(A2)を蒸着速度0.3nm/秒で30nm蒸着した後、燐光ドーパント材料であるトリス(2−フェニルピリジン)イリジウム(Ir(ppy)3)とホスト材料である4,4’−ビス(N−カルバゾリル)ビフェニル(CBP)を重量比が1:11.5になるように蒸着速度0.25nm/秒で共蒸着し、20nmの発光層とした。次に、2,9−ジメチル−4,7−ジフェニル−1,10−フェナントロリン(BCP)を蒸着速度0.3nm/秒で蒸着し、10nmのエキシトンブロック層とした後、さらに、Alq3(トリス(8−キノリノラト)アルミニウム)を0.3nm/秒で蒸着し、30nmの電子輸送層とした。引続き、電子注入層として沸化リチウムを蒸着速度0.01nm/秒で0.5nm蒸着し、さらに、アルミニウムを蒸着速度0.25nm/秒で100nm蒸着して陰極を形成した。窒素雰囲気下、封止用のガラス板をUV硬化樹脂で接着し、評価用の有機EL素子とした。このように作製した素子に20mA/cm2の電流を印加し、駆動電圧及び外部量子効率を測定した。結果を表1に示す。
Example 20 (Element evaluation of compound (A2))
The glass substrate on which the ITO transparent electrode (anode) having a thickness of 200 nm was laminated was subjected to ultrasonic cleaning with acetone and pure water and boiling cleaning with isopropyl alcohol. Furthermore, ultraviolet / ozone cleaning was performed, and after evacuation with a vacuum pump until it was 1 × 10 −4 Pa after installation in a vacuum deposition apparatus. First, NPD was deposited on the ITO transparent electrode at a deposition rate of 0.3 nm / second to form a 20 nm hole injection layer. Subsequently, after depositing compound (A2) at a deposition rate of 0.3 nm / second for 30 nm, phosphorous dopant material tris (2-phenylpyridine) iridium (Ir (ppy) 3 ) and host material 4,4′- Bis (N-carbazolyl) biphenyl (CBP) was co-evaporated at a deposition rate of 0.25 nm / second so that the weight ratio was 1: 11.5 to obtain a 20 nm light emitting layer. Next, 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP) was deposited at a deposition rate of 0.3 nm / second to form an exciton block layer having a thickness of 10 nm, and further, Alq 3 (Tris (8-quinolinolato) aluminum) was deposited at 0.3 nm / second to form a 30 nm electron transport layer. Subsequently, lithium fluoride was deposited as an electron injection layer to a thickness of 0.5 nm at a deposition rate of 0.01 nm / second, and aluminum was further deposited to a thickness of 100 nm at a deposition rate of 0.25 nm / second to form a cathode. In a nitrogen atmosphere, a sealing glass plate was bonded with a UV curable resin to obtain an organic EL element for evaluation. A current of 20 mA / cm 2 was applied to the device thus fabricated, and driving voltage and external quantum efficiency were measured. The results are shown in Table 1.
実施例21 (化合物(A45)の素子評価)
化合物(A2)を化合物(A45)に変更した以外は実施例20と同じ方法で有機EL素子を作製した。20mA/cm2の電流を印加した際の駆動電圧及び外部量子効率を表1に示す。
Example 21 (Element evaluation of compound (A45))
An organic EL device was produced in the same manner as in Example 20 except that the compound (A2) was changed to the compound (A45). Table 1 shows the driving voltage and the external quantum efficiency when a current of 20 mA / cm 2 is applied.
実施例22 (化合物(A52)の素子評価)
化合物(A2)を化合物(A52)に変更した以外は実施例20と同じ方法で有機EL素子を作製した。20mA/cm2の電流を印加した際の駆動電圧及び外部量子効率を表1に示す。
Example 22 (Element evaluation of compound (A52))
An organic EL device was produced in the same manner as in Example 20 except that the compound (A2) was changed to the compound (A52). Table 1 shows the driving voltage and the external quantum efficiency when a current of 20 mA / cm 2 is applied.
実施例23 (化合物(A57)の素子評価)
化合物(A2)を化合物(A57)に変更した以外は実施例20と同じ方法で有機EL素子を作製した。20mA/cm2の電流を印加した際の駆動電圧及び外部量子効率を表1に示す。
Example 23 (Element evaluation of compound (A57))
An organic EL device was produced in the same manner as in Example 20 except that the compound (A2) was changed to the compound (A57). Table 1 shows the driving voltage and the external quantum efficiency when a current of 20 mA / cm 2 is applied.
実施例24 (化合物(A59)の素子評価)
化合物(A2)を化合物(A59)に変更した以外は実施例20と同じ方法で有機EL素子を作製した。20mA/cm2の電流を印加した際の駆動電圧及び外部量子効率を表1に示す。
Example 24 (Element Evaluation of Compound (A59))
An organic EL device was produced in the same manner as in Example 20 except that the compound (A2) was changed to the compound (A59). Table 1 shows the driving voltage and the external quantum efficiency when a current of 20 mA / cm 2 is applied.
実施例25 (化合物(B3)の素子評価)
化合物(A2)を化合物(B3)に変更した以外は実施例20と同じ方法で有機EL素子を作製した。20mA/cm2の電流を印加した際の駆動電圧及び外部量子効率を表1に示す。
Example 25 (Element evaluation of compound (B3))
An organic EL device was produced in the same manner as in Example 20 except that the compound (A2) was changed to the compound (B3). Table 1 shows the driving voltage and the external quantum efficiency when a current of 20 mA / cm 2 is applied.
実施例26 (化合物(B13)の素子評価)
化合物(A2)を化合物(B13)に変更した以外は実施例20と同じ方法で有機EL素子を作製した。20mA/cm2の電流を印加した際の駆動電圧及び外部量子効率を表1に示す。
Example 26 (Element Evaluation of Compound (B13))
An organic EL device was produced in the same manner as in Example 20 except that the compound (A2) was changed to the compound (B13). Table 1 shows the driving voltage and the external quantum efficiency when a current of 20 mA / cm 2 is applied.
比較例2 (NPDの素子評価)
化合物(A2)をNPDに変更した以外は実施例20と同じ方法で有機EL素子を作製した。20mA/cm2の電流を印加した際の駆動電圧及び外部量子効率を表1に示す。
Comparative Example 2 (NPD element evaluation)
An organic EL device was produced in the same manner as in Example 20 except that the compound (A2) was changed to NPD. Table 1 shows the driving voltage and the external quantum efficiency when a current of 20 mA / cm 2 is applied.
実施例27 (化合物(A2)の素子寿命評価)
厚さ200nmのITO透明電極(陽極)を積層したガラス基板を、アセトン及び純水による超音波洗浄、イソプロピルアルコールによる沸騰洗浄を行なった。さらに、紫外線/オゾン洗浄を行ない、真空蒸着装置へ設置後、1×10−4Paになるまで真空ポンプにて排気した。まず、ITO透明電極上に銅フタロシアニンを蒸着速度0.1nm/秒で蒸着し、10nmの正孔注入層とした。引続き、NPDを蒸着速度0.3nm/秒で25nm蒸着し、その後、化合物(A2)を蒸着速度0.1nm/秒で5nm蒸着した。続いて、燐光ドーパント材料であるトリス(2−フェニルピリジン)イリジウム(Ir(ppy)3)とホスト材料である4,4’−ビス(N−カルバゾリル)ビフェニル(CBP)を重量比が1:11.5になるように蒸着速度0.25nm/秒で共蒸着し、30nmの発光層とした。次に、BAlq(ビス(2−メチル−8−キノリノラート)(p−フェニルフェノラート)アルミニウム)を蒸着速度0.3nm/秒で蒸着し、5nmのエキシトンブロック層とした後、さらにAlq3(トリス(8−キノリノラト)アルミニウム)を0.3nm/秒で蒸着し、45nmの電子輸送層とした。引続き、電子注入層として沸化リチウムを蒸着速度0.01nm/秒で0.5nm蒸着し、さらにアルミニウムを蒸着速度0.25nm/秒で100nm蒸着して陰極を形成した。窒素雰囲気下、封止用のガラス板をUV硬化樹脂で接着し、評価用の有機EL素子とした。このように作製した素子に6.25mA/cm2の電流を印加し、輝度半減時間を評価した。結果を表2に示す。
Example 27 (Evaluation of device lifetime of compound (A2))
The glass substrate on which the ITO transparent electrode (anode) having a thickness of 200 nm was laminated was subjected to ultrasonic cleaning with acetone and pure water and boiling cleaning with isopropyl alcohol. Furthermore, ultraviolet / ozone cleaning was performed, and after evacuation with a vacuum pump until it was 1 × 10 −4 Pa after installation in a vacuum deposition apparatus. First, copper phthalocyanine was deposited on the ITO transparent electrode at a deposition rate of 0.1 nm / second to form a 10 nm hole injection layer. Subsequently, NPD was deposited at a deposition rate of 0.3 nm / second to 25 nm, and then compound (A2) was deposited at a deposition rate of 0.1 nm / second to 5 nm. Subsequently, tris (2-phenylpyridine) iridium (Ir (ppy) 3 ) as a phosphorescent dopant material and 4,4′-bis (N-carbazolyl) biphenyl (CBP) as a host material have a weight ratio of 1:11. Co-deposited at a deposition rate of 0.25 nm / second to obtain a 30 nm emission layer. Next, BAlq (bis (2-methyl-8-quinolinolato) (p-phenylphenolato) aluminum) was deposited at a deposition rate of 0.3 nm / second to form a 5 nm exciton block layer, and then Alq 3 (Tris (8-quinolinolato) aluminum) was deposited at 0.3 nm / second to form a 45 nm electron transport layer. Subsequently, lithium fluoride was deposited as an electron injection layer to a thickness of 0.5 nm at a deposition rate of 0.01 nm / second, and aluminum was further deposited to a thickness of 100 nm at a deposition rate of 0.25 nm / second to form a cathode. In a nitrogen atmosphere, a sealing glass plate was bonded with a UV curable resin to obtain an organic EL element for evaluation. A current of 6.25 mA / cm 2 was applied to the device thus fabricated, and the luminance half time was evaluated. The results are shown in Table 2.
実施例28 (化合物(A57)の素子寿命評価)
化合物(A2)を化合物(A57)に変更した以外は実施例27と同じ方法で有機EL素子を作製した。6.25mA/cm2の電流を印加した際の輝度半減時間を表2に示す。
Example 28 (Device Life Evaluation of Compound (A57))
An organic EL device was produced in the same manner as in Example 27 except that the compound (A2) was changed to the compound (A57). Table 2 shows the luminance half time when a current of 6.25 mA / cm 2 was applied.
実施例29 (化合物(A59)の素子寿命評価)
化合物(A2)を化合物(A59)に変更した以外は実施例27と同じ方法で有機EL素子を作製した。6.25mA/cm2の電流を印加した際の輝度半減時間を表2に示す。
Example 29 (Evaluation of device lifetime of compound (A59))
An organic EL device was produced in the same manner as in Example 27 except that the compound (A2) was changed to the compound (A59). Table 2 shows the luminance half time when a current of 6.25 mA / cm 2 was applied.
参考例1 (参考化合物(a)の素子寿命評価)
化合物(A2)を参考化合物(a)に変更した以外は実施例27と同じ方法で有機EL素子を作製した。6.25mA/cm2の電流を印加した際の輝度半減時間を表2に示す。
Reference Example 1 (Evaluation of Device Life of Reference Compound (a))
An organic EL device was produced in the same manner as in Example 27 except that the compound (A2) was changed to the reference compound (a). Table 2 shows the luminance half time when a current of 6.25 mA / cm 2 was applied.
Claims (3)
で表されるアミン化合物。 General formula (1)
An amine compound represented by
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