CN106749315B - 8- hexyl-thieno [3 ', 2 ':3,4] benzo [1,2-c] carbazole compound and its synthetic method - Google Patents

8- hexyl-thieno [3 ', 2 ':3,4] benzo [1,2-c] carbazole compound and its synthetic method Download PDF

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CN106749315B
CN106749315B CN201611197432.1A CN201611197432A CN106749315B CN 106749315 B CN106749315 B CN 106749315B CN 201611197432 A CN201611197432 A CN 201611197432A CN 106749315 B CN106749315 B CN 106749315B
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hexyl
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thieno
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thiophene
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刘陟
陈霆
张保杰
冯英
罗新羽
崔得良
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Shandong University
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Abstract

The present invention relates to 8- hexyl-thienos [3 ', 2 ':3,4] benzo [1,2-c] carbazole compound (I) and its synthetic method.The present invention, using the method for photocatalysis closed loop, obtains 8- hexyl-thieno [3 ', 2 ' of a kind of favorable solubility using carbazole derivates and thiophene derivant as raw material:3,4] benzo [1,2-c] carbazole compound.Synthetic method operation of the present invention is simple, and post-processing is simple, application easy to spread.8- hexyl-thieno [3 ', 2 ':3,4] benzo [1,2-c] carbazole compound is expected to be used widely in fields such as organic electroluminescent, organic field-effect tube, organic second-order non-linear, chiral liquid crystal and biological medicines.

Description

8- hexyl-thieno [3 ', 2 ':3,4] benzo [1,2-c] carbazole compound and its Synthetic method
Technical field
Present invention relates particularly to a kind of 8- hexyl-thieno [3 ', 2 ' 3,4] benzo [1,2-c] carbazole compounds (to be under the jurisdiction of Sulphur azepine [5] helicene compound) and its synthetic method, belong to technical field of organic synthesis.
Background technique
Helicene compound especially hetero atom helicene compound and its synthetic method are currently the research of organic synthesis field Hot spot.It is as follows about the progress of hetero atom [5] helicene compound in recent years:Caronna is with symmetrical stilbenes Double miscellaneous nitrogen [5] helicenes of Material synthesis, referring to Bazzini, C.;Brovelli,S.;Caronna,T.,et al.Eur.J.Org.Chem.2005,1247-1257;Abbate, which is used as using phenyl ring as single ring, benzo [h] isoquinolin, to be contained Nitrogen systems have synthesized 1- azepine and/or 3- azepine [5] helicene, referring to Abbate, S.;Bazzini,C.;Caronna,T.,et al.Tetrahedron,2006,62,139-148);Adam is using 2,9- dimethyl -1,10- phenanthroline as six nitrogen of Material synthesis Miscellaneous [5] helicene, referring to Adam, R.;Ballesteros-Garrido,R.;Vallcorba,O.,et al.Tetrahedron Lett.2013,54,4316–4319.In helicene structure introducing hetero-atoms be proved to the electric property to helicene material, Optical property and photorefractive property are advantageous, referring to Maiorana, S.;Papagni,A.;Licandro,E., Tetrahedron,2003,59,6481–6488.In short, the prior art is more to the research of azepine [5] helicene, and for sulphur nitrogen There is not been reported for the research of miscellaneous [5] helicene.
The synthesis of helicene is related to a series of chemical reaction, wherein a vital step is:Ring-closure reaction.Since helicene Since being found for the first time, people always study ring-closure reaction.Tanaka reconciles biaryl coupling reaction according to metal, makes Use TiCl3, DME and Zn-Cu compound synthesized [7] helicene, referring to Tanaka, K., et al., J.Org.Chem.1997, 62,4465-4470), but the method is more complicated, and the reaction time is long, nearly 40 hours time-consuming.Ogawa is according to oxy- Cope rearrangement reaction uses KH, 18- crown ether -6, THF, NaBH4, EtOH etc. synthesized 2- acetate [5] helicene, referring to Ogawa, Y., et al., Tetrahedron Lett.2002,43,7827-7829, but use this method from closed loop precursor It also needs to react by 6 steps to final helicene, reaction step is too many, cumbersome.Shawn is acted on according to olefin metathesis, is used Microwave heating technique, seal pipe, methylene chloride and ruthenium catalyst have synthesized a series of helicenes, referring to hawn, K.C., et al., Angew.Chem.Int.Ed.2006,45,2923-2926, but the method reaction condition require it is relatively high, used catalyst compared with It is expensive, cause synthesis cost higher.Ichikawa utilizes magic acid, hexafluoroisopropanol, triphenyl tetrafluoro according to gram type cyclisation is paid Boric acid carbon and 1,2- dichloroethanes have synthesized a series of helicenes, referring to Ichikawa, J., et al., Angew.Chem.Int.Ed.2008,47,4870-4873, but this method is comparatively laborious from closed loop precursor to final spiral shell Alkene also needs 3 steps to react, and it is somewhat expensive to react required reagent.Oyama has synthesized two using platinum chloride and 1,2- dichloroethanes Methyl silicon [7] helicene, referring to Oyama, H., et al., Org.Lett.2013,15 (9), 2104-2107, but the method makes Platinum chloride catalyst is more expensive.Ruch utilizes benzylamine, palladium acetate, the bis- diphenylphosphine -9,9- xanthphos of 4,5- A series of helicene has been synthesized with cesium carbonate, referring to Ruch, A.A., Org.Biomol.Chem.2016,14,8123-8140, but The method is comparatively laborious, and by-product is more.It is answered in conclusion these routes and synthetic method much have Material synthesis It is miscellaneous, reaction step is more, the reaction time is long, it is at high cost, operate and post-process the disadvantages of loaded down with trivial details, practical and economic value is by very Big limitation.
Summary of the invention
In view of the deficiencies of the prior art, the present invention is intended to provide 8- hexyl-thieno [3 ', 2 ':3,4] benzo [1,2-c] Carbazole compound and its synthetic method.
Summary of the invention:
The present invention is starting reaction raw materials with carbazole derivates and thiophene derivant, can be with by photocatalysis ring-closure reaction A kind of sulphur azepine [5] helicene compound with good solubility and extensive use of preparation, there is not yet suchization in current material Report in terms of conjunction object and its synthetic method.
Detailed description of the invention:
The invention is realized by the following technical scheme:
1,8- hexyl-thieno [3 ', 2 ':3,4] benzo [1,2-c] carbazole compound
8- hexyl-thieno [3 ', 2 ' of the invention:3,4] benzo [1,2-c] carbazole compound has shown in general formula I Structure:
Wherein, substituent R1-R8Independent is H, C1-C6Alkyl, halogen, boryl, containing C, H, N, O, S atom Aromatic rings or aromatic heterocycle;R9For n-hexyl.
It is preferred according to the present invention, substituent R1-R8Independent is H, C1-C6Alkyl, Cl, Br, boryl, benzene or Thiophene;R9For n-hexyl.
It is further preferred that R3For C1-C6Alkyl, Cl, Br, boryl, benzene or thiophene,;R1、R2、R4-R8For H;R9It is positive Hexyl.
More preferably, above-mentioned generalformulaⅰcompound is one of following:
8- hexyl-thieno [3 ', 2 ':3,4] benzo [1,2-c] carbazole I (a)
The bromo- 8- hexyl-thieno [3 ', 2 ' of 11-:3,4] benzo [1,2-c] carbazole I (b)
(trimethylphenyl) boryl -8- of 11- bis- hexyl-thieno [3 ', 2 ':3,4] benzo [1,2-c] carbazole I (c)
11- thiophene -8- hexyl-thieno [3 ', 2 ':3,4] benzo [1,2-c] carbazole I (d)
8- thiophene-thieno [3 ', 2 ':3,4] benzo [1,2-c] carbazole I (e)
2,8- hexyl-thieno [3 ', 2 ':3,4] synthetic method of benzo [1,2-c] carbazole compound
8- hexyl-thieno [3 ', 2 ' of the invention:3,4] synthetic method of benzo [1,2-c] carbazole compound, with Trans- 9- n-hexyl -3- (2- thiophene-vinyl) carbazole derivates are raw material, are prepared by photocatalysis ring-closure reaction.
Chemical equation is as follows:
Reagent and condition:Benzene;I2:Iodine;Propylene oxide;hv:Ultraviolet light;
R1-R9As described in above-mentioned general structure I.
8- hexyl-thieno [3 ', 2 ' of the invention:3,4] synthetic method of benzo [1,2-c] carbazole compound, packet Include following steps:
(1) organic solvent is purified with the way of distillation, is saved under an inert atmosphere stand-by;
(2) by trans- 9- n-hexyl -3- (2- thiophene-vinyl) carbazole derivates and iodine with molar ratio (1-2):1 is added to In the organic solvent of step (1) purifying, is stirred in dissolution, the concentration 0.0005-0.2 of solute in solution is made after being completely dissolved Mol/L is led to inert gas 20-120 minutes;
(3) under lasting stirring state, propylene oxide is added in step (2) resulting solution, solution in ethylene third is made The concentration of alkane is 0.05-3.0 mol/L;
(4) quartz glass irradiating step (3) are penetrated resulting solution 10-120 minutes extremely with the high-pressure sodium lamp of 100-800W Reaction terminates, and obtains crude product;
(5) vacuum rotates out solvent, is successively 5- with mass fraction in methylene chloride by the dissolution of resulting crude product 60% Na2S2O3Solution and distillation water washing;
(6) separating-purifying is carried out to organic filtrate and obtains product.
It is preferred according to the present invention,
Organic solvent described in step (1) is selected from one of benzene, toluene, n-hexane, tetrahydrofuran or methylene chloride.
Separating-purifying in step (6) refer to organic filtrate is extracted, is washed, is dried, is spin-dried for, silica gel column chromatography, Product is obtained after recrystallization separation.
According to the present invention it is further preferred that 8- hexyl-thieno [3 ', 2 ':3,4] benzo [1,2-c] carbazole I (a) Preparation method includes the following steps:
(1) method by organic solvent-benzene air-distillation is purified, and is saved under an inert atmosphere stand-by;
(2) trans- 9- n-hexyl -3- (2- thiophene-vinyl) carbazole 0.45mmol and iodine 0.45mmol is added to step (1) it in the 500ml organic solvent-benzene purified, stirs in dissolution, after being completely dissolved, leads to inert gas 20-60 minutes;
(3) under lasting stirring state, 18ml propylene oxide is added in step (2) resulting solution, solution middle ring is made The concentration of Ethylene Oxide is 0.4-0.6 mol/L;
(4) with the high-pressure sodium lamp of 500-800W through quartz glass irradiating step (3) resulting solution 10-60 minutes to anti- It should terminate to obtain crude product;
(5) vacuum rotates out solvent, is successively 15- with mass fraction in methylene chloride by the dissolution of resulting crude product 20% Na2S2O3Solution and distillation water washing;
(6) organic filtrate extracted, washed, being dried, is spin-dried for, after silica gel column chromatography, recrystallization separating-purifying, being obtained 8- hexyl-thieno [3 ', 2 ':3,4] benzo [1,2-c] carbazole I (a).
Excellent results of the invention are as follows:
Compared with existing helicene derivative, the present invention is using carbazole derivates and thiophene derivant as raw material, extremely short 8- hexyl-thieno [3 ', 2 ' of a kind of favorable solubility is obtained in time:3,4] benzo [1,2-c] carbazole compound.This Invention synthetic method operation is simple, and post-processing is simple, application easy to spread.Experiments have shown that 8- hexyl-thieno [3 ', 2 ': 3,4] benzo [1,2-c] carbazole compound has good dissolubility in different organic solvents, is conducive to mentioning for the compound Pure, film;It can get a variety of sulphur azepine [5] helicene compounds by accessing different substituents.8- hexyl-thiophene provided by the invention Pheno simultaneously [3 ', 2 ':3,4] benzo [1,2-c] carbazole compound can be in organic electroluminescent, organic field-effect tube, organic second It is used widely in the fields such as non-linear, chiral liquid crystal and biological medicine.
Detailed description of the invention
Fig. 1 is the hydrogen spectrogram of trans- 9- n-hexyl -3- (2- thiophene-vinyl) carbazole II (a);Abscissa is chemical shift δ, unit:ppm.
Fig. 2 is the carbon spectrogram of trans- 9- n-hexyl -3- (2- thiophene-vinyl) carbazole II (a);Abscissa is chemical shift δ, unit:ppm.
Fig. 3 is the mass spectrogram of trans- 9- n-hexyl -3- (2- thiophene-vinyl) carbazole II (a);Abscissa is mass-to-charge ratio m/ z;Ordinate is relative intensity, unit:%.
Fig. 4 is 8- hexyl-thieno [3 ', 2 ':3,4] the hydrogen spectrogram of benzo [1,2-c] carbazole I (a);Abscissa is δ, single Position:ppm.
Fig. 5 is 8- hexyl-thieno [3 ', 2 ':3,4] the carbon spectrogram of benzo [1,2-c] carbazole I (a);Abscissa is δ, single Position:ppm.
Fig. 6 is 8- hexyl-thieno [3 ', 2 ':3,4] mass spectrogram of benzo [1,2-c] carbazole I (a);Abscissa is matter lotus Compare m/z;Ordinate is relative intensity, unit:%.
Specific embodiment
The present invention will be further explained with reference to the examples below, but not limited to this.Instrument is described as follows with reagent:
High-pressure sodium lamp (Beijing source Zhong Jiaojin Science and Technology Ltd.), the method for benzene air-distillation is purified, remaining examination Agent is that chemistry is pure.
The trans- 9- n-hexyl -3- of raw material used in embodiment (2- thiophene-vinyl) carbazole (II) (a-e) utilizes Heck reaction preparation.
Below by taking the preparation method of the raw material II (a) of embodiment 1 as an example, reaction equation is as follows:
Preparation step is as follows:
3- bromine 9- n-hexyl carbazole:At normal temperature, magneton, 3- bromine carbazole are added into dried 250ml single-necked flask (4.92g, 0.02mol), tetrabutylammonium bromide (TBAB, (n-C4H9)4BrN, 3g, 9.2mmol), sodium hydroxide (1.2g, 0.03mol) with 80ml acetone, stir evenly.60 DEG C at a temperature of be stirred at reflux, reaction 2-4 hour after, stop react, to It is using constant pressure funnel that the mixing of (4.26ml, 0.03mol) 1- bromo n-hexane and acetone is molten when reaction system is air-cooled to room temperature Liquid is slowly added dropwise into flask.Reaction system is stirred at reflux at a temperature of 50-70 DEG C, after reaction 24 hours, stops reaction.It will Remaining acetone rotates out, is extracted using water and methylene chloride to residue, wash with distilled water after extract liquor, with nothing Water magnesium sulfate is dry, then rotates out by methylene chloride, obtains crude product.Using silica gel column chromatography separating-purifying product, Eluent is pure petroleum ether, finally obtains white solid 5.3g, yield 80%.1H NMR(400MHz,CDCl3,δ):8.19 (s, 1H), 8.03 (d, J=8Hz, 1H), 7.53-7.45 (m, 2H), 7.39 (d, J=8.4Hz, 1H), 7.25 (t, J=5.4Hz, 1H), 7.21 (t, J=3.8Hz, 1H), 4.25 (t, J=7.2Hz, 2H), 1.87-1.80 (m, 2H), 1.37-1.24 (m, 6H), 0.88 (t, J=8.0Hz, 3H)13C NMR(400MHz,CDCl3,δ):140.73,139.09,128.21,126.31, 124.58,123.07,121.84,120.53,119.17,111.51,110.10,108.92,43.22,31.54,28.87, 26.93,22.51,13.97.
Trans- 9- n-hexyl -3- (2- thiophene-vinyl) carbazole:At normal temperature, into dried 100ml three-necked flask Magneton, the bromo- 9- n-hexyl carbazole (2.15g, 6.5mmol) of 3-, 2- vinyl thiophene (0.70g, 6.5mmol), potassium carbonate is added The N of (0.90g, 6.5mmol), triphenylphosphine (1.70g, 6.5mmol), palladium acetate (0.196g, 1mmol) and 30ml, N- diformazan Base formamide (DMF), stirs evenly, and sufficiently dissolves.Led into reaction phase argon gas 20-40 minutes using gas-guide tube, is then taken out true It is 3 times empty.Reaction system is stirred at reflux at a temperature of 100 DEG C, is reacted 40-50 hours, reaction is stopped.Water is mutually poured into reaction In, then water phase is extracted 3 times with methylene chloride.It is dry with anhydrous magnesium sulfate wash with distilled water after extract liquor, then by two Chloromethanes rotates out, obtains crude product.Using silica gel column chromatography separating-purifying product, eluent is petroleum ether:Dichloromethane Alkane=25:1, finally obtain yellow solid 0.59g, yield 25%.1H NMR(400MHz,CD2Cl2,δ):8.22(s,1H), 8.14 (d, J=7.6Hz, 1H), 7.66 (dd, J=2.67Hz, 1H), 7.52-7.42 (m, 3H), 7.34 (d, J=16.4Hz, 1H), 7.27 (dd, J=4.9Hz, 1H), 7.22 (dd, J=6.3Hz, 2H), 7.14 (t, J=7.8Hz, 1H), 7.06 (dd, J= 2.8Hz, 1H), 4.32 (t, J=7.2Hz, 2H), 1.89 (t, J=7.4Hz, 2H), 1.35-1.30 (m, 6H), 0.90 (t, J= 7Hz,3H).13C NMR(400MHz,CD2Cl2,δ):143.59,140.90,140.25,129.31,128.00,127.56, 125.82,125.12,124.13,123.46,123.09,122.68,120.26,119.06,118.95,118.27,109.06, 108.97,43.17,31.56,28.90,26.89,22.53,13.75.HRMS(m/z):360.1789[M+H]+(Calcd for C24H25NS:360.1741).
Embodiment 1:8- hexyl-thieno [3 ', 2 ':3,4] preparation of benzo [1,2-c] carbazole (I a)
8- hexyl-thieno [3 ', 2 ':3,4] preparation of benzo [1,2-c] carbazole (I a), steps are as follows:
(1) method by organic solvent-benzene air-distillation is purified, and is saved under an inert atmosphere stand-by;
(2) trans- 9- n-hexyl -3- (2- thiophene-vinyl) carbazole 0.45mmol and iodine 0.46mmol is added to step (1) it in the 500ml organic solvent-benzene purified, quickly stirs in dissolution, after being completely dissolved, leads to inert gas 20-60 minutes;
(3) under lasting stirring state, 18ml propylene oxide is added in step (2) resulting solution, solution middle ring is made The concentration of Ethylene Oxide is 0.4-0.6 mol/L;
(4) quartz glass irradiating step (3) are penetrated resulting solution 10-60 minutes extremely with the high-pressure sodium lamp of 500-800W W Reaction terminates to obtain crude product;
(5) vacuum rotates out solvent, is successively 15- with mass fraction in methylene chloride by the dissolution of resulting crude product 20% Na2S2O3Solution and distillation water washing;
(6) organic filtrate extracted, washed, being dried, is spin-dried for, after silica gel column chromatography, recrystallization separating-purifying, being obtained 8- hexyl-thieno [3 ', 2 ':3,4] benzo [1,2-c] carbazole I (a).Yield 0.039g, yield 24%.
The compound in n-hexane, toluene, dichloroethanes, ethyl acetate, acetonitrile, methanol the experiment proved that have good Dissolubility.
Now by 8- hexyl-thieno [3 ', 2 ':3,4] Spectrum Analysis of benzo [1,2-c] carbazole is as follows:
1H NMR(300MHz,CDCl3,δ):8.33 (s, 2H), 7.78-7.74 (m, 2H), 7.40 (dd, J=4Hz, 4H), 7.31 (dd, J=5.3Hz, 1H), 7.17 (dd, J=2.8Hz, 1H), 4.29 (t, J=7.2Hz, 2H), 1.91 (t, J= 7.2Hz, 2H), 1.43-1.38 (m, 2H), 1.37-1.31 (m, 4H), 0.92 (t, J=7Hz, 3H)
13C NMR(300MHz,CDCl3,δ):139.78,139.71,139.59,133.85,127.67,126.66, 126.57,126.08,124.40,123.49,123.46,123.27,118.64,118.09,115.39,109.38,109.20, 43.24,31.61,29.27,27.00,22.58,14.03.
HRMS(m/z):358.1619[M+H]+(Calcd for C24H23NS:358.1585).
The trans- 9- n-hexyl -3- of raw material (2- thiophene-vinyl) carbazole and product 8- hexyl-thieno [3 ', 2 ':3,4] benzene And the nuclear magnetic resoance spectrum, mass spectrum of [1,2-c] carbazole are as shown in the picture.
Embodiment 2:11-8- hexyl-thieno [3 ', 2 ':3,4] preparation of benzo [1,2-c] carbazole I (b)
Chemical equation is as follows:
Embodiment 3:(trimethylphenyl) boryl -8- of 11- bis- hexyl-thieno [3 ', 2 ':3,4] benzo [1,2-c] carbazole I (c) preparation
Chemical equation is as follows:
Embodiment 4:11- thiophene -8- hexyl-thieno [3 ', 2 ':3,4] benzo [1,2-c] carbazole I (d)
Chemical equation is as follows:
Embodiment 5:8- thiophene-thieno [3 ', 2 ':3,4] benzo [1,2-c] carbazole I (e)
Chemical equation is as follows:

Claims (7)

1. 8- hexyl-thieno [3 ', 2 ' with structure shown in general formula I:3,4] benzo [1,2-c] carbazole compound Preparation method, which is characterized in that, as raw material, urged by light using trans- 9- n-hexyl -3- (2- thiophene-vinyl) carbazole derivates Change ring-closure reaction to be prepared;
Chemical equation is as follows:
Reagent and condition:Benzene;I2:Iodine;Propylene oxide;hv:Ultraviolet light;
Wherein, substituent R1-R8Independent is H, C1-C6Alkyl, halogen, containing C, H, N, O, S atom aromatic rings or virtue Fragrant heterocycle;R9For n-hexyl.
2. 8- hexyl-thieno [3 ', 2 ' as described in claim 1:3,4] preparation of benzo [1,2-c] carbazole compound Method, which is characterized in that substituent R in general formula I1-R8Independent is H, C1-C6Alkyl, Cl, Br, benzene or thiophene;R9For N-hexyl.
3. 8- hexyl-thieno [3 ', 2 ' as claimed in claim 1 or 2:3,4] system of benzo [1,2-c] carbazole compound Preparation Method, which is characterized in that R in general formula I3For C1-C6Alkyl, Cl, Br, benzene or thiophene,;R1、R2、R4-R8For H;R9It is positive oneself Base.
4. 8- hexyl-thieno [3 ', 2 ' as claimed in claim 1 or 2:3,4] system of benzo [1,2-c] carbazole compound Preparation Method, which is characterized in that generalformulaⅰcompound is one of following:
8- hexyl-thieno [3 ', 2 ':3,4] benzo [1,2-c] carbazole I (a)
The bromo- 8- hexyl-thieno [3 ', 2 ' of 11-:3,4] benzo [1,2-c] carbazole I (b)
11- thiophene -8- hexyl-thieno [3 ', 2 ':3,4] benzo [1,2-c] carbazole I (d)
5. 8- hexyl-thieno [3 ', 2 ' as described in claim 1:3,4] preparation of benzo [1,2-c] carbazole compound Method, which is characterized in that include the following steps:
(1) organic solvent is purified with the way of distillation, is saved under an inert atmosphere stand-by;
(2) by trans- 9- n-hexyl -3- (2- thiophene-vinyl) carbazole derivates and iodine with molar ratio (1-2):1 is added to step (1) it in the organic solvent purified, is stirred in dissolution, the concentration 0.0005-0.2 of solute in solution is made to rub after being completely dissolved You/liter, lead to inert gas 20-120 minutes;
(3) under lasting stirring state, propylene oxide is added in step (2) resulting solution, solution in ethylene propane is made Concentration is 0.05-3.0 mol/L;
(4) it is extremely reacted within resulting solution 10-120 minutes with the high-pressure sodium lamp of 100-800W through quartz glass irradiating step (3) Terminate, obtains crude product;
(5) vacuum rotates out solvent, is successively 5-60%'s with mass fraction in methylene chloride by the dissolution of resulting crude product Na2S2O3Solution and distillation water washing;
(6) separating-purifying is carried out to organic filtrate and obtains product.
6. 8- hexyl-thieno [3 ', 2 ' as claimed in claim 5:3,4] preparation of benzo [1,2-c] carbazole compound Method, which is characterized in that the separating-purifying in step (6) refer to organic filtrate is extracted, is washed, is dried, is spin-dried for, silica gel Product is obtained after column chromatography, recrystallization separation.
7. 8- hexyl-thieno [3 ', 2 ' as claimed in claim 4:3,4] preparation method of benzo [1,2-c] carbazole I (a), Include the following steps:
(1) method by organic solvent-benzene air-distillation is purified, and is saved under an inert atmosphere stand-by;
(2) that trans- 9- n-hexyl -3- (2- thiophene-vinyl) carbazole 0.45mmol and iodine 0.45mmol is added to step (1) is pure It in the 500ml organic solvent-benzene of change, stirs in dissolution, after being completely dissolved, leads to inert gas 20-60 minutes;
(3) under lasting stirring state, 18ml propylene oxide is added in step (2) resulting solution, solution in ethylene third is made The concentration of alkane is 0.4-0.6 mol/L;
(4) it is tied with the high-pressure sodium lamp of 500-800W through quartz glass irradiating step (3) extremely reaction in resulting solution 10-60 minutes Beam obtains crude product;
(5) vacuum rotates out solvent, is successively 15-20% with mass fraction in methylene chloride by the dissolution of resulting crude product Na2S2O3Solution and distillation water washing;
(6) organic filtrate extracted, washed, being dried, is spin-dried for, silica gel column chromatography, recrystallization separating-purifying after, obtain 8- oneself Base-thieno [3 ', 2 ':3,4] benzo [1,2-c] carbazole I (a).
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