9,9-二[4-(4-羧基苯氧基)苯基]呫吨的合成

在碘化亚铜、四丁基溴化铵和磷酸钾存在下,9,9-二(4-羟基苯基)呫吨(1)和4-甲基碘苯(2)于N,N-二甲基甲酰胺溶剂中发生Ullmann偶联反应,加热回流反应24 h,以95%的产率合成了中间体--9,9-二[4-(4-甲基苯氧基)苯基]呫吨(3),继而加入催化量的N-溴代丁二酰亚胺并在光照条件下,将中间体3氧化得到一种新型芳香族二羧酸--9,9-二[4-(4-羧基苯氧基)苯基]呫吨(4),其产率为84%,二步反应总收率为79.8%。 目标化合物4经1H NMR、13C NMR、IR和元素分析测试技术确定了其结构。 该法具有原料易得,操作简单,反应条件温和,收率高等优点。     

9, 9-二(3-氨基-4-羟基苯基)呫吨的合成

以醋酸酐为溶剂, 将9, 9-二(4-羟基苯基)呫吨与浓硝酸在15 ℃左右发生硝化反应1.5 h, 形成中间体-9, 9-二(3-硝基-4-羟基苯基)呫吨, 产率为88.5%;继而以Pd/C 为催化剂, 80%的水合肼为还原剂, 在乙醇和1, 4-二氧六环混合溶剂中, 于70 ℃将中间体进行还原反应10 h, 得到目标产物9, 9-二(3-氨基-4-羟基苯基)呫吨, 产率为90.8%, 两步反应总收率为80.4%。 中间体与目标化合物经NMR、FTIR和元素分析等确定了它们的结构。     

一种可溶性含呫吨结构的聚醚醚酮酮的合成与表征

以呫吨酮为起始原料,经二氯亚砜作用得到9,9-二氯呫吨中间体,继而与苯酚发生取代反应,探索了"一锅、二步"法制备含呫吨结构的双酚单体———9,9-二(4-羟基苯基)呫吨(BHPX)的新方法.在氮气保护下,在K2CO3存在下,以环丁砜为溶剂,将其与1,3-二(4-氟苯甲酰基)苯进行亲核缩聚反应,制得了一种高分子量的(数均分子量为45000,多分散性指数为1.9)新型含呫吨结构的Cardo型聚醚醚酮酮(PEEKK-X),并用FTIR,DSC,TG及WAXD等方法对其进行了分析表征.结果表明,所制得的聚合物(PEEKK-X)为无定形结构,其玻璃化转变温度(Tg)为215℃;在氮气气氛中5%的热失重温度(Td)为558℃,700℃时的残炭率为67%;在常温下易溶于非质子极性溶剂(如NMP、DMF和DMAc)和极性较弱的溶剂如CHCl3中.该聚合物可通过溶液浇铸成膜,所得到的薄膜韧性好,透明且耐折,其拉伸强度为81.5 MPa,杨氏膜量为2.48 GPa,断裂伸长率为16.8%.     

一种含三氟甲基和呫吨结构聚酰胺的合成与性能

在浓硫酸和3-巯基丙酸催化下,3′-三氟甲基苯基-2,2,2-三氟苯乙酮(1)和甲苯于40～50℃下缩合反应8 h,制得中间体-1,1-二(4-甲基苯基)-1-(3′-三氟甲基苯基)-2,2,2-三氟甲基乙烷(2),继而在光照和N-溴代丁二酰亚胺促进下,将中间体氧化得到二羧酸-1,1-二(4-羧基苯基)-1-(3′-三氟甲基苯基)-2,2,2-三氟甲基乙烷(3),二步反应总收率为77.4%.采用Yamazaki体系,3和9,9-二[(4-氨基苯氧基)苯基]呫吨进行溶液亲核缩聚反应,制得了一种高分子量的(数均分子量为43000,分子量分布为1.8)新型含三氟甲基和呫吨结构的聚酰胺.该聚酰胺为非晶态结构并具有良好的透光率(λcutoff=330 nm),其玻璃化转变温度(Tg)为242℃,在氮气气氛中5%的热失重温度(Td5)为465℃,800℃时的残炭率为50%.聚合物易溶于N,N-二甲基乙酰胺(DMAc)、N-甲基吡咯烷酮(NMP)、间甲酚、吡啶(Py)和四氢呋喃(THF)等有机溶剂中,并可浇注得到韧性好和透明的薄膜,其拉伸强度为85 MPa,拉伸模量为2.0 GPa,断裂伸长率为10%.同时,该聚合物的体积电阻、表面电阻和介电常数分别为2.85×1015Ωcm,4.23×1014Ω和3.55(100 Hz),呈现了良好的电绝缘性能.     

9,9-二(4-羟基苯基)呫吨、1,4-二(4-氟苯甲酰基)苯和双酚A三元共聚物聚醚醚酮酮的合成与表征

通过亲核取代反应,将9,9-二(4-羟基苯基)呫吨(BHPX)、1,4-二(4-氟苯甲酰基)苯和双酚A(BPA)进行三元共缩聚反应,合成了几种主链含二甲基甲烷和呫吨结构的聚醚醚酮酮无规共聚物(PEEKK-X/PEEKK-A),并以FTIR、DSC、TG、WAXD等对其结构和性能进行了表征.结果表明,共聚物的玻璃化转变温度(Tg)为185～218℃,均为无定形结构,其数均分子量为39500～41600,多分散性指数为1.94～2.05.在氮气、空气气氛中,在430℃之前不分解,5%的热失重温度(Td5)分别为490～511℃、480～505℃,在氮气中700℃时的残炭率均在40%以上;在常温下易溶于非质子极性溶剂(如NMP和DMAc)以及极性较弱的溶剂(如THF和CHCl3)中.共聚物均可通过溶液浇铸成膜,所得到的薄膜韧性好,透明且耐折,其拉伸强度为58～75MPa,杨氏膜量为1.95～2.70GPa,断裂伸长率为8%～13%.当双酚单体BHPX和BPA摩尔比为60/40～50/50时,所得到的PEEKK-X/PEEKK-A共聚物更有潜在的应用前景.     

呋喃并呫吨酮衍生物的合成与生物活性研究

以水杨酸、间苯三酚为原料合成了1,3-二羟基呫吨酮, 经醚化、环化反应得到1-羟基呋喃并呫吨酮3a和3b, 再经Mannich反应合成了10个呋喃并呫吨酮衍生物4和5, 接着通过季铵化反应得到相应的10个季铵盐6和7. 运用IR、一维和二维NMR、MS、元素分析等对化合物进行了结构表征, 考察了化合物4～7对乙酰胆碱酯酶的抑制作用及化合物6, 7的抗癌活性. 结果表明: 化合物4～7对乙酰胆碱酯酶具有较好的抑制活性, IC50＝2.0～12.4 μmol/L; 化合物6, 7对肝癌(HepG2)、肺癌(SPC-A)、口腔上皮癌(KB)、乳腺癌(MCF-7)这四种癌细胞株的增殖均有抑制作用, 其中化合物6c对癌细胞株HepG2、化合物7d对癌细胞株MCF-7的抑制作用最强, IC50分别为0.82和0.77 μmol/L.     

氮杂类聚合大环化合物的合成

以间苯二甲酰氯为原料, 分别与二(4-氨基苯基)甲烷、二(4-氨基苯基)醚及二(4-氨基苯基)砜通过一步反应合成了3种新的[3＋3]氮杂类聚合大环化合物, 产率分别为41%, 40%和36%; 并通过元素分析, IR, 1H NMR,13C NMR和MS对其结构进行了表征.     

一种含三氟甲基和咕吨结构聚酰胺的合成与性能

在浓硫酸和3-巯基丙酸催化下,3'-三氟甲基苯基-2,2,2-三氟苯乙酮(1)和甲苯于40～50℃下缩合反应8 h,制得中间体-1,1-二(4-甲基苯基)-1-(3'-三氟甲基苯基)-2,2,2-三氟甲基乙烷(2),继而在光照和N-溴代丁二酰亚胺促进下,将中间体氧化得到二羧酸-1,1-二(4-羧基苯基)-1-(3'-三...     

β-(3,4-二羟基苯基)-α-羟基丙酸异丙酯/冰片酯合成研究

以3,4-二羟基苯甲醛为起始原料, 经苄基保护、Darzens环氧化、Lewis酸开环、NaBH4还原、催化加氢脱保护得到β-(3,4-二羟基苯基)-α-羟基丙酸异丙酯和β-(3,4-二羟基苯基)-α-羟基丙酸冰片酯, 所得化合物的结构通过1H NMR、13C NMR, IR, MS证实. 该方法操作简单、毒性低、产物易于纯化.     

可光固化单体2,7-二溴-9,9-双[4’-(3″-乙基-3″-氧杂环丁烷甲氧基己基氧基)苯基]芴的合成

以芴为原料,经溴代和氧化反应制得2,7-二溴芴酮(3);3与苯酚反应合成2,7-二溴-9,9-双(4’-羟基苯基)芴(4);4与3-(6’-溴己氧基甲基)-3-乙基氧杂环丁烷经醚化反应合成了可光固化单体2,7-二溴-9,9-双[4’-(3″-乙基-3″-氧杂环丁烷甲氧基己基氧基)苯基]芴,总收率67%,其结构经1H NMR,13C NMR和元素分析表征。     

New Organosoluble and Optically Transparent Polyamides Containing Xanthene Units and Methyl Pendant Groups From 9,9-Bis[4-(4-carboxyphenoxy)-3-methylphenyl]xanthene

A new aromatic dicarboxylic acid, 9,9-bis[4-(4-carboxyphenoxy)-3-methylphenyl]xanthene (BCAMPX) was prepared from the nucleophilic substitution reaction of 9,9-bis(4-hydroxy-3-methylphenyl)xanthene with p-fluorobenzonitrile, followed by alkaline hydrolysis. Then BCAMPX was polycondensated with various aromatic diamines to afford the polyamides with the number-average molecular weight in the range of 45,300–51,500 and the polydispersity index ranged from 1.67 to 1.85. These polyamides showed glass transition temperatures between 260–286°C and 10% weight loss temperatures ranging from 490 to 504°C and 480 to 490°C in nitrogen and air respectively, and char yields above 52% at 800°C in nitrogen. Nearly all polyamides were readily soluble polar aprotic solvents such as N-methyl-2-pyrrolidone, N,N-dimethylacetamide (DMAc), tetrahydrofuran and pyridine, and afforded transparent, strong and flexible films upon casting from DMAc solvent. All polyamides were amorphous and exhibited tensile strengths of 80–91 MPa, elongations at break of 9–13%, and initial moduli of 1.95–2.82 GPa, as well as low moisture absorption in the range of 2.65–3.65%, and high transparency with an ultraviolet–visible absorption cut-off wavelength in the 360–378 nm range.     

Synthesis and Characterization of New Soluble Polyamides from 9,9-Bis[4-(chloroformylphenoxy)phenyl]xanthene and Various Aromatic Diamines

9,9‐Bis(4‐hydroxyphenyl)xanthene (BHPX) was synthesized in 82% yield from xanthenone in a one‐pot, two‐step synthetic procedure. A new diacyl chloride monomer, 9,9‐bis[4‐(chloroformylphenoxy)phenyl]xanthene (BCPX), was synthesized in three steps from the nucleophilic fluorodisplacement of 4‐fluorobenzonitrile with the dipotassium bisphenolate of BHPX, followed by alkaline hydrolysis of the intermediate bis(ether nitrile), and then chlorination with thionyl chloride. Several novel aromatic polyamides containing ether and bulky xanthene groups with the inherent viscosities (0.72–0.98 dL/g) were prepared by the low temperature polycondensation of BCPX with various aromatic diamines in N,N‐dimethylacetamide (DMAc) solution containing pyridine (Py). All new polyamides were amorphous and readily soluble in various polar solvents such as DMAc, N,N‐dimethylformamide (DMF), N‐methyl‐2‐pyrrolidone (NMP) and Py. These polymers showed relatively high glass transition temperatures between 236 and 298°C, decomposition temperatures at 10% weight loss ranging from 490 to 535°C and 483 to 515°C in nitrogen and air, respectively, and char yields at 700°C in nitrogen higher than 50%. Transparent, flexible, and tough films of these polymers cast from DMAc solutions exhibited tensile strengths ranging from 82 to 106 MPa, elongations at break from 10% to 25%, and initial moduli from 2.0 to 2.8 GPa.     

A novel class of organosoluble poly(arylene ether nitrile) copolymers containing methyl substituent and cardo xanthene moiety

9,9‐Bis(3‐methyl‐4‐hydroxyphenyl)xanthene (BMHPX) was synthesized in 72% yield by a HCl/ZnCl₂‐catalyzed condensation reaction of xanthenone with excess o‐cresol. Based on this new bisphenol monomer, a series of poly(arylene ether nitrile) (PAEN) and PAEN copolymers containing methyl substituent and cardo xanthene moiety were prepared by the nucleophilic substitution reaction of 2,6‐difluorobenzonitrile (DFBN) with BMHPX and with varying mole proportions of BMHPX to hydroquinone (HQ) (100/0–40/60) using N‐methyl‐2‐pyrrolidone (NMP) as solvent in the presence of anhydrous potassium carbonate. These polymers had inherent viscosities between 0.54 and 0.72 dl/g, and their weight‐average molecular weights and number‐average molecular weights were in the range of 32,600–36,400 and 17,300–18,300, respectively. All PAENs were amorphous and were soluble in dipolar aprotic solvents such as NMP and N,N‐dimethylacetamide (DMAc), and even in THF and chloroform at room temperature. The resulting polymers showed glass transition temperatures (T_g's) between 213–226°C, and the T_g values of the copolymers were found to increase with increase of the BMHPX units content in the polymer. Thermogravimetric studies showed that all the polymers were stable up to 404°C, with 10% weight loss temperatures ranging from 444 to 455°C, and char yields of 52–58% at 700°C in nitrogen. All new PAENs could be cast into transparent, strong, and flexible films with tensile strengths of 102–120 MPa, elongations at break of 14–18%, and tensile moduli of 3.3–3.7 GPa. Copyright © 2011 John Wiley & Sons, Ltd.     

A new fluorinated poly(ether amide) bearing xanthene group

<正>A new fluorinated poly(ether amide) bearing xanthene group was prepared from 9,9-bis[4-(2-trifluoromethyl-4-aminophenoxy) phenyl]xanthene(BTFAPX) with 9,9-bis[4-(4-carboxyphenoxy)phenyl]xanthene(BCAPX) in the presence of triphenyl phosphate and pyridine(Py).The polymer had the weight-average molecular weight(M_w) of 69,000 and number-average molecular weight(Mn) of 39,000,showed the glass transition temperature(T_g) of 267℃,5%weight loss temperature(T_(d5)) over 460℃both in N_2 and air,and char yield of 62%at 800℃in N_2.This polymer was amorphous and readily soluble in amide-type solvents such as N,N-dimethylacetamide(DMAc),and even in m-cressol,Py and tetrahydrofuran(THF) at room temperature,and exhibited tensile strength of 74 MPa,elongation at break of 6%,tensile moduli of 2.2 GPa.The polymer had low dielectric constant of 3.69(100 Hz), low moisture absorption of 0.56%,and high transparency with an ultraviolet-visible absorption cut-off wavelength at 334 nm.     

Optically high transparency and light color of organosoluble fluorinated polyamides with bulky xanthene pendent groups

New fluorinated polyamides were prepared directly from a diamine, 9,9‐bis[4‐(2‐trifluoromethyl‐4‐aminophenoxy)phenyl]xanthene ( BTFAPX ) with various aromatic dicarboxylic acid chlorides by low‐temperature polycondensation. The polymers were produced with moderate‐to‐high inherent viscosities of 0.65–1.01 dl/g while the weight‐average molecular weight and number‐average molecular weight were in the range of 69,000–82,000 and 39,000–43,000, respectively. Nearly all the polymers were readily soluble in amide‐type polar aprotic solvents [e.g. N, N‐dimethylacetamide (DMAc) and N‐methyl‐2‐pyrrolidinone], and even in less polar solvents such as dimethyl sulfoxide and pyridine, and afforded transparent, light‐colored, and flexible films upon casting from DMAc solvent. The polymers showed glass transition temperatures between 235 and 284°C, and 10% weight loss temperatures ranging from 495 to 532°C and 476 to 510°C in nitrogen and air, respectively, and char yields higher than 55% at 800°C in nitrogen. All polymers were amorphous and their films exhibited tensile strengths of 64–95 MPa, elongations at break of 6–9%, and tensile moduli of 1.9–2.5 GPa. These polymers had dielectric constants ranging from 3.65 to 4.03 (100 Hz), low‐moisture absorption in the range of 0.56–1.14%, and high transparency with an ultraviolet–visible absorption cut‐off wavelength in the 334–372 nm range. Copyright © 2010 John Wiley & Sons, Ltd.