阅读说明：本技术 呋喃稠合硼氮杂二氢芘及其合成方法 (Furan-fused boron-nitrogen heterodihydropyrene and synthetic method thereof ) 是由 刘旭光 李二龙 于 2021-10-22 设计创作，主要内容包括：本发明目的在于,提供一种呋喃稠合硼氮杂二氢芘多环芳烃分子的设计及合成方法,为获得更加高效的有机光电材料提供更多的方案。为了达到上述目的,本发明采用的技术方案是：一类由3,6-二(呋喃-3-基)苯-1,2-二胺为原料,由氮导向生成特定位置的呋喃稠合硼氮杂二氢芘大共轭多环芳烃及其衍生物,该类化合物的结构式为：其中R是独立的,可以是烷烃,也可以是取代或非取代的芳基或者杂芳基。R-(1),R-(2)是独立的,可以是取代或者非取代芳基,杂芳基,烷烃,环烷烃,烯烃,炔烃,也可以是氢或者单个取代的卤素原子X：F、Cl、Br、I。Ar芳基分别为苯环、噻吩环、呋喃环、吡咯、吡啶、苯并噻吩、苯并呋喃、苯并吡咯、苯并吡啶、萘环、蒽环、非那烯、并四苯、芘、线性或者有角度的并五苯、并六苯、茚或芴。(The invention aims to provide a design and synthesis method of furan fused boron aza-dihydropyrene polycyclic aromatic hydrocarbon molecules, and provides more schemes for obtaining more efficient organic photoelectric materials. In order to achieve the purpose, the invention adopts the technical scheme that: the compound is prepared from 3, 6-di (furan-3-yl) benzene-1, 2-diamine as a raw material, and furan fused boron aza dihydro pyrene large conjugated polycyclic aromatic hydrocarbon and derivatives thereof at specific positions are generated by nitrogen guiding, wherein the structural formula of the compound is as follows: wherein R is independent and can be alkane, and can also be substituted or unsubstituted aryl or heteroaryl. R 1 ，R 2 Independently, it may be substituted or unsubstituted aryl, heteroaryl, alkane, cycloalkane, alkene, alkyne, also hydrogen or a single substituted halogen atom X: F. cl, Br and I. Ar aryl is benzene ring, thiophene ring, furan ring, pyrrole, pyridine, benzothiophene and benzoFuran, benzopyrrole, benzopyridine, naphthalene ring, anthracene ring, phenalene, tetracene, pyrene,)

1. The compound is prepared from 3, 6-di (furan-3-yl) benzene-1, 2-diamine as a raw material, and furan fused boron aza dihydro pyrene large conjugated polycyclic aromatic hydrocarbon and derivatives thereof at specific positions are generated by nitrogen guiding, wherein the structural formula of the compound is as follows:

wherein R is independent and can be alkane, and can also be substituted or unsubstituted aryl or heteroaryl. R₁，R₂Independently, it may be substituted or unsubstituted aryl, heteroaryl, alkane, cycloalkane, alkene, alkyne, also hydrogen or a single substituted halogen atom X: F. cl, Br and I.Ar aryl is benzene ring, thiophene ring, furan ring, pyrrole, pyridine, benzothiophene, benzofuran, benzopyrrole, benzopyridine, naphthalene ring, anthracene ring, phenalene, tetracene, pyrene, perylene, or the like,Linear or angular pentacene, hexacene, indene or fluorene.

2. The method for synthesizing furan-fused boron-aza-dihydropyrene large conjugated polycyclic aromatic hydrocarbon and its derivatives as claimed in claim 1, wherein the main reaction steps are hydroboration reaction of 2-furan aniline compound and aryl potassium trifluoroborate to obtain furan-fused boron-aza-dihydropyrene large conjugated polycyclic aromatic hydrocarbon and its derivatives. The synthetic route is as follows:

3. R-BF used in synthetic route of furan fused boron aza dihydro pyrene large conjugated polycyclic aromatic hydrocarbon and derivatives thereof as claimed in claim 2₃R in K is aliphatic hydrocarbon group or aromatic hydrocarbon group. The method comprises the following steps: potassium phenyltrifluoroborate, potassium 4-methoxyphenyl trifluoroborate, potassium 4-cyanophenyltrifluoroborate, potassium 4-bromophenyl trifluoroborate, potassium 4-methylphenyl trifluoroborate, and the like.

4. The method for synthesizing furan fused borazadihydropyrene large conjugated polycyclic aromatic hydrocarbon and its derivative according to claim 2 comprises the following steps:

1) the 2-furan aniline compound is obtained by Suzuki coupling reaction of 3, 6-dibromobenzene-1, 2-diamine and 2-furanboronic acid.

2) Carrying out hydroboration reaction on the obtained 2-furan aniline compound and aryl potassium trifluoroborate to obtain furan fused boron nitrogen heterodihydropyrene large conjugated polycyclic aromatic hydrocarbon and derivatives thereof.

Technical Field

The invention relates to furan fused boron aza dihydropyrene and a synthesis method thereof, wherein commercially available 3, 6-dibromobenzene-1, 2-diamine is used as a raw material, and furan fused boron aza dihydropyrene and derivatives thereof can be obtained through Suzuki coupling reaction, Lewis base-guided electrophilic boron cyclization reaction and Suzuki coupling reaction. The synthesis method has the characteristics of simple operation, mild reaction conditions, short reaction path and the like.

Background

Polycyclic Aromatic Hydrocarbons (PAHs) have attracted considerable attention due to their unique electronic properties and supramolecular properties, making them organic semiconductor devices (e.g., organic semiconductors)Airport effect transistor (OFET)_s) Organic photovoltaic device (OPV)_s) And Organic Light Emitting Diode (OLED)_s) ) are selected.

Borazine is an isoelectron and isostructure of benzene ring because the outermost layer of boron atom has three valence electrons, the outermost layer of nitrogen atom has five valence electrons, and the outermost layer of carbon atom has four valence electrons. Replacing carbon-carbon bonds in polycyclic aromatic hydrocarbons with isoelectric boron-nitrogen bonds is an important approach to the development of novel aromatic compounds because it enables significant changes in optical and electronic properties while maintaining the same conjugated backbone. The positive dipole borazine bond is considered to be an amphoteric pi bond in the neutral state, which replaces the zero dipole carbon-carbon bond, producing a stable free radical cation during oxidation.

Over the past 20 years, there has been a rapid development of pi-conjugated materials containing trivalent Boron, pioneered by Willams and Kaim, which has an empty P-orbital, giving it unique electronic and steric characteristics (C.D. Entwistle, T.B. Marker, Boron chemistry lights of molecular and polymeric systems, animal. chem. int. Ed.2002, 41, 2927-. In the pi conjugated system, boron atom can be used as excellent electron acceptor through the P-pi action between empty P orbit and pi-pi orbital, so as to regulate the photoelectric property of polycyclic conjugated arene. A trivalent nitrogen atom is an isoelectric substance of a carbon atom as compared with a boron atom, and can be a good electron donor due to the presence of a lone pair. When trivalent nitrogen atoms and boron atoms coexist, intramolecular strong charge transfer can occur, and the photoelectric physical properties of the molecules are adjusted. Therefore, it can be applied to a wide range of fields such as nonlinear optical devices, organic light emitting diodes.

In 1958, the Dewar group synthesized boron-nitrogen substituted naphthalene compounds for the first time. In 1960 Dewar and White synthesized monocyclic 1-azaborone derivatives for the first time. Dewar et al, in 1962, used desulfurization to obtain more substituted 1, 2-azaborones from borazine-substituted benzothiazoles. White et al synthesized 1-H-2-phenyl-1, 2-azaborones in 1963, opening the door to boron nitrogen chemistry (M.J.S.Dewar, V.P.Kubba, R.Pettit, 624.New heterologous compounds, part I.9-Aza-10-boraphenonthrene, J.chem.Soc.1958, 3073-.

Due to the limitations of synthesis methods, detection means and people's knowledge of the compounds, research on boron-nitrogen doped polycyclic aromatic hydrocarbon compounds is silent for more than 40 years. Until 2000 years later, with the technological progress, the invention of a simple synthesis method and the discovery of scientists in the research process that boron-nitrogen doping can effectively adjust the photoelectric physical properties of a directional system, boron-nitrogen doped polycyclic conjugated aromatic hydrocarbon has attracted research interest again.

The Ashe group at michigan university, 2000, made a breakthrough development in the synthesis of monocyclic 1, 2-azaborol compounds in a mild manner. In 2011, the Japanese Nakamura group applied Dewar's method to synthesize boron-nitrogen substituted aromatics and developed a series of intramolecular boron alkylation methods (T. Hatakeyyama, S. Hashimoto, S.Seki, M.Nakamura, Synthesis of BN-fused polymeric aromatic via branched electrophoretic aromatic hydrogenation. J.Am. chem. Soc.2011, 133, 18614-. In 2012, Nakamura et al synthesized racemic borazabisphenyl [6] spiroalkene (T.Hatakeyama, T.Oba, M.Nakamura, Azoborabenzo [6] helicene: carrier inversion induced by pharmaceutical homochirality, J.Am.chem.Soc.2012, 134, 19600-. In 2014, the Nakamura group uses the synthesized boron-nitrogen doped polycyclic aromatic compound and the derivative thereof as the main material layer of the phosphorescent light-emitting diode, and the device has better service life. The Yamaguchi group recently reported the synthesis of 1, 2-azaborones of large pi systems based on trialkyl substitution. Pentacene and heptacene compounds centered on 1, 4 boron nitrogen molecules were synthesized by Kawashima's group. Hatakeyama, Nakamura et al, reported the synthesis of bis-borazine ring-bonded polycyclic aromatic hydrocarbons by a series of intramolecular electrophilic boraalkylation.

Later professor of Molander, Boston school of Lily, and Pederthrough, Beijing university reported isomers of heteronaphthalene compounds substituted at the boron nitrogen site, and scientists subsequently synthesized anthracene, phenanthrene, pyrene doped with boron nitrogen and aromatic hydrocarbons doped with boron nitrogen in larger conjugated structures.

With the technological progress in recent years, the invention of a simple synthesis method and the discovery of that boron-nitrogen doping can effectively adjust the photoelectric physical properties of an aromatic system in the research process of scientists, the boron-nitrogen doped polycyclic conjugated aromatic hydrocarbon successfully arouses the research interest of people, the potential application of the boron-nitrogen doped polycyclic conjugated aromatic hydrocarbon in electronic equipment is widely researched, but the potential application characteristic in luminescent materials is not widely developed.

In conclusion, the boron-nitrogen doped polycyclic aromatic hydrocarbon can synthesize various novel conjugated structures by modifying a conjugated framework, and the unique photoelectric property and the supramolecular performance of the structure have good application value in the fields of organic photoelectric materials, energy storage, field emission and the like, and can be applied to the field of organic semiconductor devices (such as Organic Field Effect Transistors (OFETs)_s) Organic photovoltaic device (OPV)_s) And Organic Light Emitting Diode (OLED)_s) Has received attention due to its unique properties, and is also significant for future solar applications and the development of photocatalysis.

Disclosure of Invention

The invention aims to provide a design synthesis method of furan fused boron aza-dihydropyrene and potential application thereof, and provides more schemes for obtaining more efficient organic photoelectric materials.

In order to achieve the purpose, the invention adopts the technical scheme that:

the method comprises the steps of carrying out Suzuki coupling reaction on 3, 6-dibromobenzene-1, 2-diamine and 2-furanboronic acid to obtain a 2-furananiline compound, and carrying out hydroboration reaction on the obtained 2-furananiline compound and aryl potassium trifluoroborate to obtain furan fused boron-nitrogen heterodihydropyrene large conjugated polycyclic aromatic hydrocarbon and derivatives thereof.

The structural formula of the compound is as follows:

wherein R is independent and can be alkane, and can be substituted or unsubstitutedA substituted aryl or heteroaryl group. R₁，R₂，R₄₈Independently, it may be substituted or unsubstituted aryl, heteroaryl, alkane, cycloalkane, alkene, alkyne, and may also be hydrogen or a single substituted halogen atom. Ar aryl is benzene ring, thiophene ring, furan ring, pyrrole, pyridine, benzothiophene, benzofuran, benzopyrrole, benzopyridine, naphthalene ring, anthracene ring, phenalene, tetracene, pyrene, perylene, or the like,Linear or angular pentacene, hexacene, indene or fluorene.

The synthetic route of the boron-nitrogen doped polycyclic aromatic hydrocarbon parent compound is as follows:

the method comprises the following specific steps:

1) a100 mL flask was charged with 1.0mmol of 3, 6-dibromobenzene-1, 2-diamine, 1.5mmol of glyoxal, 1.5mmol of triethylamine, flushed with argon three times, and then charged with an argon balloon, and 20mL of ethanol was added via syringe and reacted at room temperature for 16 hours. After completion of the reaction, methylene chloride was dissolved and washed with a saturated aqueous sodium bicarbonate solution. The organic layer was collected and dried over anhydrous sodium sulfate, filtered, and the solvent was dried by spinning, and the product was purified by silica gel column chromatography, eluted with ethyl acetate and petroleum ether to give compound 1 as a white solid.

2) A100 mL flask was charged with 11.0mmol of the compound, 1.5mmol of arylfuranboronic acid, and 0.05mmol of palladium acetate, flushed with argon three times, and charged with an argon balloon, and then 20mL of 1, 4-dioxane was added via a syringe, and reacted at 50 ℃ for 8 hours. After completion of the reaction, methylene chloride was dissolved and washed with a saturated aqueous sodium bicarbonate solution. The organic layer was collected and dried over anhydrous sodium sulfate, filtered, and the solvent was dried by spinning, and the product was purified by silica gel column chromatography, eluted with ethyl acetate and petroleum ether to give compound 2 as a white solid.

3) Weighing 21mmol of the compound in a glove box, placing the compound in a sealed tube, and adding 2.5mmol of aryl potassium trifluoroborate, 4.0mmol of triethylamine, 4.0mmol of silicon tetrachloride, and 5ml of each of toluene and cyclopentylmethyl ether. Taking out from the glove box after covering the cover, reacting for 5h at 80 ℃, cooling to room temperature, adding water for quenching, spin-drying the solvent, adding water and dichloromethane for extraction, drying with anhydrous sodium sulfate, filtering, spin-drying the solvent, and separating and purifying by column chromatography to obtain the compound 3 as a white solid.

The structure of the furan fused boraaza-dihydropyrene derivative compound is as follows:

the synthesis method of the furan fused boron aza dihydro pyrene derivative compound comprises the following steps:

the method comprises the following specific steps:

31mmol of the compound is weighed in a glove box and placed in a sealed tube, 2.5mmol of potassium aryl trifluoroborate, 4.0mmol of triethylamine, 4.0mmol of silicon tetrachloride and 5ml of toluene and 5ml of methyl cyclopentylmethyl ether are added. Taking out from the glove box after covering the cover, reacting for 5h at 80 ℃, cooling to room temperature, adding water for quenching, spin-drying the solvent, adding water and dichloromethane for extraction, drying with anhydrous sodium sulfate, filtering, spin-drying the solvent, and separating and purifying by column chromatography to obtain the compounds 4a-4 e.

Drawings

FIG. 1 is an absorption spectrum of furan-fused boraazadihydropyrene.

FIG. 2 is an emission spectrum of furan fused boraazadihydropyrene.

FIG. 3 is a single crystal structure of furan fused borazadihydropyrene 4 d.

FIG. 4 is a single crystal structure of furan fused borazadihydropyrene 4 e.

FIG. 5 is of furan fused boraazadihydropyrene 4a¹H-NMR。

FIG. 6 is of furan fused boraazadihydropyrene 4b¹H-NMR。

FIG. 7 is of furan fused boraazadihydropyrene 4c¹H-NMR。

FIG. 8 is of furan fused boraazadihydropyrene 4d¹H-NMR。

FIG. 9 is of furan fused boraazadihydropyrene 4e¹H-NMR。

Detailed Description

The following examples are helpful in understanding the present invention, but are not limited to the contents of the present invention.

The invention relates to an integral synthesis method of furan fused boron nitrogen heterodihydropyrene, a synthesis route and a specific synthesis method:

the above compounds are exemplified by the following:

example (b): synthesis of compounds 1, 2, 3 and 4a-4 e;

1) synthesis of Compound 1: a100 mL flask was charged with 3, 6-dibromobenzene-1, 2-diamine (265.9mg, 1.0mmol, 1.0equiv), glyoxal (87.06mg, 1.5mmol, 1.5equiv), triethylamine (151.79mg, 1.5mmol, 1.5equiv), flushed with argon three times, a balloon of argon was added, 20mL of ethanol was added with a syringe, and reacted at room temperature for 16 h. After completion of the reaction, methylene chloride was dissolved and washed with a saturated aqueous sodium bicarbonate solution. The organic layer was collected and dried over anhydrous sodium sulfate, filtered, and the solvent was dried by spinning, and the product was purified by silica gel column chromatography, eluted with ethyl acetate and petroleum ether to give compound 1 as a white solid.

2) Synthesis of Compound 2: a100 mL flask was charged with Compound 1(287.94mg, 1.0mmol, 1.0equiv), sodium borohydride (378.25mg, 10.0mmol, 10.0equiv), flushed with argon three times, and charged with an argon balloon, then 50mL of absolute ethanol was added with a syringe, and reacted at room temperature for 16 h. After completion of the reaction, methylene chloride was dissolved and washed with a saturated aqueous sodium bicarbonate solution. The organic layer was collected and dried over anhydrous sodium sulfate, filtered, and the solvent was dried by spinning, and the product was purified by silica gel column chromatography, eluted with ethyl acetate and petroleum ether to give product 2 as a white solid.

3) Synthesis of Compound 3: a100 mL flask was charged with Compound 2(291.97mg, 1.0mm0l, 1.0equiv), arylfuranboronic acid (1.5mmol, 1.5equiv), palladium acetate (11.22mg, 0.05mmol, 0.05equiv), potassium carbonate (288.42mg, 3.0mmol, 3.0equiv), flushed with argon three times, an argon balloon was added, 20mL of 1, 4-dioxane was added with a syringe, and reacted at 50 ℃ for 8 h. After completion of the reaction, methylene chloride was dissolved and washed with a saturated aqueous sodium bicarbonate solution. The organic layer was collected and dried over anhydrous sodium sulfate, filtered, and the solvent was dried by spinning, and the product was purified by silica gel column chromatography, eluted with ethyl acetate and petroleum ether to give product 3 as a white solid.

4) Synthesis of Compounds 4a-4 e: in a glove box, compound 3(266.30mg, 1.0mmol, 1.0equiv) was weighed into a sealed tube, and potassium aryltrifluoroborate (2.5mmol, 2.5equiv), triethylamine (404.36mg, 4.0mmol, 4.0equiv), silicon tetrachloride (679.52mg, 4.0mmol, 4.0equiv) toluene and cyclopentylmethyl ether were added in an amount of 5ml each. Taking out from the glove box after covering the cover, reacting for 5h at 80 ℃, cooling to room temperature, adding water for quenching, spin-drying the solvent, adding water and dichloromethane for extraction, drying with anhydrous sodium sulfate, filtering, spin-drying the solvent, and separating and purifying by column chromatography to obtain the compounds 4a-4 e.