1,4-二甲基-2-（三氟甲基）苯的合成

以对二甲苯为原料,无水氟化氢（HF）为溶剂及催化剂,在4.0~5.0 MPa的压力下与CCl4进行傅克反应和氟化反应。经实验发现,在得到1,4-二甲基-2-（三氟甲基）苯的同时还得到副产物1,5-二甲基-2-（三氟甲基）苯。通过对所得产物进行NMR（核磁共振）检测和红外检测,确认了产品结构。同时从理论上对这一现象进行了分析,认为在这个反应过程中发生了缺电子重排反应。     

双邻位甲基取代聚芳醚酮酮醚酮酮／聚芳醚醚酮酮无规共聚物的合成与表征

以4，4’-二（2，6-二甲基苯氧基）三苯二酮（o-M2DPOTPK）、1，4-二苯氧基苯（DPB）为单体，以1，2-二氯乙烷（DCE）为溶剂，无水三氯化铝和N，N-二甲基甲酰胺（DMF）为复合催化溶剂体系，与对苯二甲酰氯（TPC）低温缩聚，合成了一系列高摩尔质量含双邻位甲基取代结构的聚芳醚酮酮醚酮酮（M-PEKKEKK）／聚芳醚醚酮酮（PEEKK）三元无规共聚物，并对聚合物进行了表征。     

高效液相色谱法测定1,4-双(4-氨基-2-三氟甲基苯氧基)苯的含量

采用高效液相色谱法,用Hypersil BDS C18柱(4.6 mm×200 mm,粒径5μm),乙腈-水(v∶v=60∶40)为流动相,检测波长252 nm,测定1,4-双(4-氨基-2-三氟甲基苯氧基)苯(6FAPB)的含量。在0.24~0.48 mg/m L范围内,方法线性良好(r=0.999 8),回收率98.35%~99.93%,重现性RSD≤0.63%,n=5。     

4-氯-3-(三氟甲基)苯异氰酸酯及其衍生物索拉菲尼的合成

本文以邻氯三氟甲苯为起始原料,经混酸硝化,催化氢化,与BTC在1,2-二氯乙烷和1,4-二氧六环的混合溶剂中回流制得4-氯-3-(三氟甲基)苯异氰酸酯(三步总收率87.4%),再与4-(4-氨基苯氧基))-2-(甲基氨甲酰基)毗啶缩合成腺,制得抗肿瘤药物索拉菲尼.总收率为:84.0%.纯度:99.1%.     

3,4,5-三氟-2-甲基苯类液晶化合物的合成与性能

以3,4,5-三氟苯酚、3,5-二氟-4'-烷基联苯为原料,经酚羟基保护反应、丁基锂/碘甲烷上甲基反应、Williamson醚化反应等5步反应最终合成4-[二氟(3,4,5-三氟-2-甲基-苯氧基)甲基]-3,5-二氟-4'-烷基联苯类化合物。纯化后目标产物的气相色谱纯度≥99.5%,总收率约为47%,结构经~1HNMR及GC-MS确证。其中,合成2-(3,4,5-三氟-2-甲基-苯氧基)四氢吡喃适宜的物质的量比为n(2-(3,4,5-三氟苯氧基)四氢吡喃)∶n(丁基锂)=1∶1.2,3,4,5-三氟-2-甲基苯酚和4-溴二氟甲基-3,5-二氟-4'-烷基联苯醚化反应的最优化条件为在DMSO中反应4 h。将该化合物添加到液晶的基础配方中,能降低旋转粘度(γ1),提高液晶的响应速度,增加介电各向异性(Δε),降低阈值电压。     

3,5-双三氟甲基苯甲酸的合成研究

3,5-双三氟甲基苯甲酸[CAS:725-89-3]的合成是先通过1,3-二溴-5,5-二甲基乙内酰脲,与1,3-双三氟甲基苯生成3,5-双三氟甲基溴苯,收率98%,选择性99%.然后由3,5-双三氟甲基溴苯作原料来合成3,5-双三氟甲基苯甲酸,收率72%以上.本文讨论了不同反应摩尔比,反应温度等条件,并得到最优化条件.     

2-[4-(2,6-二氟苯基)噻唑-2-基]-3-羟基-2-三氟甲基肉桂腈的合成探讨

通过对2-[4-(2,6-二氟苯基)噻唑-2-基]-3-羟基-2-三氟甲基肉桂腈合成方法及重要中间体2-氰甲基-4-(2,6-二氟苯基)噻唑合成的探讨,综合考虑原料来源、工艺难易等因素,得到一条比较合理的合成路线。     

1，4-双（4-氨基苯氧基）-2，5-二特丁基苯及其聚酰亚胺的合成与性能研究

在有机溶剂体系中,2,5-二特丁基对苯二酚与对氯硝基苯在碳酸钾的作用下进行缩合反应,得到了1,4-双（4-硝基苯氧基）-2,5-二特丁基苯晶体（14BNPODTB）,随后,在钯/碳-水合肼的还原体系中反应,获得了高纯度的白色1,4-双（4-氨基苯氧基）-2,5-二特丁基苯（14BAPODTB）晶体产物。利用差示扫描量热计（DSC）,熔点仪,傅立叶转换红外光谱仪（FTIR）等分别对其进行了表征。另外,也进行了聚合试验,获得了聚酰胺酸树脂（14BAPODTB-440DA／PMDA—PAA）溶液,涂膜,热亚胺化,制得了聚酰亚胺薄膜（14BAPODTB-440DA／PMDA—PI）,并对其性能进行了研究。     

4-(芳氨基甲酰甲基)-1,4-苯并噁嗪类化合物的合成

利用3,4-二氢-1,4-苯并噁嗪(2)和氯乙酰芳胺经N-烷基化反应合成了4-(芳氨基甲酰甲基)-1,4-苯并噁嗪类衍生物1a～1h.研究了溶剂、温度及反应时间对反应的影响,优化条件下,收率达50％～70％.用IR、1H NMR、13C NMR等对产物的结构进行了表征.     

4-（2＇-氟-4＇-氰基苯氧基）苯酚的合成新方法

4-（2＇-氟-4＇-氰基苯氧基）苯酚是合成苯氧丙酸类高效除草剂的重要中间体。研究了4-（2＇-氟-4＇-氰基苯氧基）苯酚合成的新方法。该方法以3,4-二氟苯腈和对羟基苯甲醚为主要原料,首先合成4-（2＇-氟-4＇-氰基苯氧基）苯甲醚,再经三溴化硼还原得到4-（2＇-氟-4＇-氰基苯氧基）苯酚。通过红外、核磁及质谱等分析手段对其化学结构进行了鉴定,两步反应总收率为64%,产品纯度95.2%,克服了文献报道的合成方法产量小、收率低的缺点。     

1,3-双(4-氨基苯氧基)苯的合成方法研究

间苯二酚和对氯硝基苯经缩合反应、合成得到1,3-双(4-硝基苯氧基)苯,以FeCl3.6H2O/C为催化剂,水合肼为还原剂,在乙醇中还原得到1,3-双(4-氨基苯氧基)苯。采用薄层色谱(TLC)对反应进程进行了跟踪研究,并用熔点测定仪、DSC,FT-IR、1H-NMR和元素分析等分析方法对目标产物的结构进行了表征。试验结果表明:当m[1,3-双(4-硝基苯氧基)苯]=14.1 g(40.1 mmol)、V(水合肼)=20 mL时,选择催化剂m(FeCl3.6H2O)=1.00 g、m(C)=2.50 g进行反应,并控制水合肼加入时的反应温度为70℃,加完以后在回流温度进行反应,还原反应产物的得率可达60%左右[以1,3-双(4-硝基苯氧基)苯计]。     

对苯二甲基二甲醚的制备

以对二氯苄为原料,与甲醇钠反应合成了对苯二甲基二甲醚,对其工业化生产工艺进行了优化。     

Preparation and properties of polyamide-imides derived from 1,3-bis(4-aminophenoxy)benzene,trimellitic anhydride,and various aromatic diamines

A diamine, 1,3-bis(4-aminophenoxy) benzene (II), was synthesized in two steps; fist from the condensation of resorcinol with p-chloronitrobenzene in the presence of potassium carbonate, producing I ,3-bis(4-nitrophenoxy) benzene (I), followed by hydrazine hydrate/Pd-C reduction. A two imide rings-preformed dicarboxylic acid, 1,3-bis(4-trimellitimidophenoxy)benzene (III), was prepared from the condensation of diamine II and trimellitic anhydride in 1:2 molar ratio. A series of structurally new polyamide-imides (V_a-p) were directly synthesized from the diacid III and various aromatic diamines (IV_a-p). The resultant polyamide-imides had inherent viscosities between 0.56–1.39 dl/g. All polymers, except some derived from diamines with p-phenoxy structure, showed excellent solubility. Some polymer resulted in tough or flexible transparent films. Dynamic TG data indicated that all polymers possess excellent thermal stability with no significant weight loss up to the temperature of approximately 450 °C in nitrogen, and their 10% weight loss temperature was recorded in the range of 489–577 °C. Measurements of wide-angle X-ray diffraction revealed that some polymers derived from p-phenoxy group-containing diamines showed crystalline patterns.     

1,4-二(对氟苯甲酰基)苯的合成与纯化

1,4-二(对氟苯甲酰基)苯是合成聚芳醚酮的单体之一,采用付-克酰化反应合成了1,4-二(对氟苯甲酰基)苯,并采用红外光谱(IR)、元素分析、差示扫描量热仪(DSC)和核磁共振谱(1H-NMR)对产物结构进行了表征。     

一锅法合成1,4-二(2,2'-二吡咯甲基)苯

以吡咯和对苯二甲醛为原料,采用无溶剂Michael加成反应一步合成1,4-二(2,2'-二吡咯甲基)苯(BDMP)。考察了投料比、温度、催化剂等因素对反应的影响。得出合成的最佳工艺条件为:n(吡咯)∶n(对苯二甲醛)∶n(丙酸)=4∶1∶0.1,反应温度25℃,反应时间30min。在此条件下,产品1,4-二(2,2'-二吡咯甲基)苯的收率可达85%,纯度可达95%(HPLC)。目标化合物经1HNMR、13CNMR确证。     

Reinvestigation on the synthesis of hexakis(phenylseleno)benzene

Reactions of hexafluorobenzene with PhSeNa in dimethylformamide (DMF) afforded 1,4-bis(phenylseleno)benzene 3 and 1,2,4,5-tetrakis(phenylseleno)benzene 4, instead of the reported product, hexakis(phenylseleno) benzene 1. Reactions of hexabromobenzene with PhSeNa in hexamethylphosphoric triamide (HMPA) afforded 1,4-bis-6, 1,2,4,5-tetrakis-7 and hexakis(phenylseleno)benzene 1. The structures of the products were established by X-ray crystallographic analysis.     

Preparation and properties of poly(amideether-imide)s derived from 1,4-bis(4-aminophenoxy)benzene,trimellitic anhydride,and various aromatic diamines

An imide ring containing dicarboxylic acid, 1,4-bis(4-trimellitimidophenoxy)benzene (III), was prepared by the condensation of 1,4-bis(4-aminophenoxy)benzene and trimellitic anhydride. A series of new poly(amide-ether-imide)s were prepared by the direct polycondensation of diimide-diacid III with various aromatic diamines using triphenyl phosphite and pyridine as condensing agents inN-methyl-2-pyrrolidone (NMP) in the presence of calcium chloride. The highest inherent viscosity value of a poly(amide-ether-imide) obtained was 1.78 dL/g (inN,N-dimethylacetamide, DMAc, at 30 °C). Flexible films with excellent tensile properties were cast from DMAc solutions. Glass transition temperatures of these poly(amide-ether-imide)s were recorded in the range of 248–297 C. These polymers do not show obvious weight loss before 400°C; the decomposition temperatures at which 10% weight loss in nitrogen and in air were observed for these poly(amide-ether-imide)s in the range of 521–564°C and 501–539°C, respectively. The polymers derived fromp-phenylenediamine or the diamines containing 1,4-bisphenoxy units exhibited a higher degree of crystallinity and higher initial decomposition temperatures but poor solubility in organic solvents.     

Preparation of 1,4-bis(4-methylstyryl)benzene nanocrystals by a wet process and evaluation of their optical properties

Single-crystal 1,4-bis(4-methylstyryl)benzene is a promising material for optoelectronic device applications. We demonstrate the preparation of 1,4-bis(4-methylstyryl)benzene nanocrystals by a wet process using a bottom-up reprecipitation technique. Scanning electron microscopy revealed the morphology of the nanocrystals to be sphere-like with an average particle size of about 60 nm. An aqueous dispersion of the nanocrystals was monodisperse and stable with a ζ-potential of -41 mV. The peak wavelengths of the absorption and emission spectra of the nanocrystal dispersion were blue and red shifted, respectively, compared with those of tetrahydrofuran solution. Powder X-ray diffraction analysis confirmed the crystallinity of the nanocrystals. The presented 1,4-bis(4-methylstyryl)benzene nanocrystals are expected to be a candidate for a new class of optoelectronic material.     

1,4-二[2-(3-氨基苯甲酰)乙烯基]苯的合成

以对苯二甲醛、间氨基苯乙酮为原料经羟醛缩合反应合成了光敏性二胺:1,4 二[2 (3 氨基苯甲酰)乙烯基]苯(Ⅰ)。通过优化实验得到最佳的合成工艺为:对苯二甲醛、间氨基苯乙酮在0℃,以乙醇为溶剂,氢氧化钠为催化剂,进行羟醛缩合反应3h,产物经重结晶提纯。Ⅰ收率为86 4%,w(Ⅰ)=99 91%。并用元素分析、红外光谱对Ⅰ的结构进行了表征。