3-(D-葡萄糖-1-基)-6-芳基-7H-1，2，4-三唑并[3，4-b][1，3，4]噻二嗪类化合物的合成及波谱研究

ω-溴代芳香基乙酮与3-(D-葡萄糖-1-基)-4-氨基-5-巯基-1，2，4-三唑反应 合成了一系列新颖的3-(D-葡萄糖-1-基)-6-芳基-7H-1，2，4三唑并[3，4-b[1，3 ，4]噻二嗪．用元素分析，IR，NMR，MS对其结构进行了表征，研究了其NMR波谱特 征，并以^1H-^1H COSY，^13C-^1H COSY，COLOC二维NMR技术对其^1H NMR，^13C NMR的谱峰进行了全归属     

邻苯二甲酰亚胺-多胺缀合物的合成及其生物活性

以邻苯二甲酰亚胺、1,3-丙二胺、1,4-丁二胺为原料,合成了5个邻苯二甲酰亚胺-多胺缀合物．所合成的目标化合物经过^1H NMR、^13C NMR、MS、元素分析确认,并评价了它们对K562（人慢性原白血病细胞）、MB231（乳腺癌细胞）、LnCap（前列腺癌细胞）的生物活性．结果表明：5个目标化合物均不具备抗肿瘤活性,提示多胺衍生化不能提高邻苯二甲酰亚胺的抗肿瘤活性．     

新型有机光致变色材料螺嗪的结构确证

采用^1H NMR谱、^13C NMR谱、DEPT（θ=3π/4）谱、红外吸收光谱、质谱等仪器分析手段确证了4种新合成的有机光致变色材料螺E嗪化合物的结构,并对化合物的^13C NMR谱化学位移和质谱碎片进行了归属和确认。     

脂肪胺聚氧乙基醚结构的核磁共振波谱表征

从工业和合成产品脂肪胺聚氧乙基醚中用TLC和快速色谱(FC)分离精制得到6个脂肪胺聚氧乙基醚模型化合物，用^1H、^13C、gCOSY，gHSQC和gHMBC等核磁共振波谱和质谱表征了其结构，完成了^1H和^13C NMR谱带的归属，为本系列化合物的结构和EO分布鉴定提供了依据，并给出了计算本系列化合物叔胺值的方法。考察了酸性条件对脂肪胺聚氧乙基醚化合物相关基团化学位移的影响。     

芳香醛与硫代巴比妥酸固相缩合反应的研究

研究了芳香醛与硫代巴比妥酸固态加热及室温下的缩合反应，两种反应条件得 到同一产物——5—亚烃基硫代巴比妥酸．由^1H NMR，^13C NMR，IR，UV等手段确 定了产物的结构．     

羰基化合物结构参数与其 13C NMR谱化学位移的关系

通过对62个羰基化合物中羰基^13C NMR谱化学位移与其部分结构参数关系研究，发现羰基^13C NMR谱化学位移与烷基极化效应指数(PEI)、部分电荷(qx)的关系可用下式表示：δ=a b∑PEI c∑qx 该式能比现有文献方法较好地表达羰基^13C NMR谱化学位移值随结构变化的规律，从而对解析^13C NMR谱及预测羰基^13C NMR谱的化学位移值提供了理论依据。     

乙拉西坦的合成

2-吡咯烷酮经N-烷基化、氨解反应合成了乙拉西坦，总收率42．6％。其结构经^1H NMR，^13C NMR和IR表征。     

含多氟烷基侧链的螺环化合物的简易合成及其谱学研究

通过多步反应合成了含有一个长链氟烷基的螺环化合物（2-（5-氯-2，2，3，3，4，4，5，5-八氟-戊烷基）．3-（1-碘-甲基）-8，8-二甲基-7，9-二氧杂-螺[4，5]癸烷-6，10-二酮）。通过对各步产物及最终化合物的^1H NMR、^13C NMR、^1H-^13C COSY和IR、MS谱及X-衍射图的分析，对相关化合物进行了结构确证。     

取代芳基吡唑和取代芳基异E唑结构的核磁共振波谱表征

用^1H,^13C NMR和多种二维磁共振谱表征了本系列化合物的结构，完成了^1H和^13C NMR谱带的归属，测定了氟原子对各质子和碳原子的偶合常数，探讨了影响偶合常数大小的因素。     

聚（3，4-二氯）噻吩的制备及表征

以四氯噻吩为原料,采用化学合成法制备了聚（3,4-二氯）噻吩．对影响合成材料结构规整度的溶剂极性进行了初步探讨,并采用元素分析、红外光谱、^13C NMR核磁谱等对目标产物进行了表征．结果表明,当采用极性较低的乙二醇二甲醚作溶剂时,可得到规整度较高的目标产物．     

A carbanion induced synthesis of highly congested pyrazole and imidazole containing heterocycles

An efficient approach to the synthesis of highly congested di, penta and hexacyclic pyrazoles as well as imidazole fragment containing novel heterocyclic molecule has been developed through a carbanion induced transformation of suitably functionalized 2H-pyran-2-ones, benzo[h]chromene and thiochromeno[4,3-b]pyrans. Due to the presence of fluorescence, we report their prime application metal sensor as off/on switching in ferric ions.     

Selective synthesis of 4,5-dihydroimidazo- and imidazo[1,5-a]quinoxalines via modified Pictet–Spengler reaction

An efficient tandem approach for the selective synthesis of 4,5-dihydroimidazo[1,5-a]quinoxalines 6a–g and imidazo[1,5-a]quinoxalines 7a–h by the reaction of 2-imidazolyl anilines 4a–c with aryl aldehydes 5a–k under mild reaction conditions is described. Introduction of electron releasing alkyl groups in substrates 4a–b was found to be instrumental for the success of the reaction.     

Understanding the Diels-Alder reactivity of 1,2-azaborine analogues

The Diels-Alder reactivity of 1,2-heteroborines (H₄C₄B(H)X, X?=?NH, PH, AsH; O, S, Se) has been computationally explored by means of Density Functional Theory (DFT) calculations. The influence of the HB?=?X fragment on the reactivity of the system has been quantitatively analyzed in detail by means of the so-called Activation Strain Model (ASM) of reactivity. It is found that the interaction between these species and the dienophile is significantly stronger than that computed for their all-carbon isoelectronic counterpart, benzene. In addition, the strain energy plays a key role in the observed reactivity trends. The role of the aromaticity strength of these heteroarenes on the reactivity is also assessed.     

Synthesis of N-substituted carbazolones from α-iodo enaminones via Pd(0)-catalyzed intramolecular coupling under microwave irradiation

A variety of N-aryl and N-alkyl carbazolones were conveniently achieved in good to high yields via Pd₂(dba)₃-mediated intramolecular coupling of N-substituted α-iodo enaminones under microwave irradiation. The Pd(0)-catalyzed cyclization was found to proceed favorably with the more electron-deficient phenyl ring during the reactions involving unsymmetrical N,N-diaryl α-iodo enaminones. This unique property enables the construction of carbazolone skeleton containing nitro substituted benzenoid ring.     

Synthesis of substituted 2,4,5,6-tetrahydrocyclopenta[c]pyrazoles and 2,4,5,6-tetrahydropyrrolo[3,4-c]pyrazoles by intramolecular nitrilimine cycloaddition

Both substituted 2,4,5,6-tetrahydrocyclopenta[c]pyrazoles and 2,4,5,6-tetrahydropyrrolo[3,4-c]pyrazoles have been synthesized by the 3+2 intramolecular dipolar cycloaddition of nitrilimines to alkynes. This cyclization has been extended to more versatile 3-bromo derivatives by the use of alkynylbromides as dipolarophiles.     

Catalyst free,visible-light promoted photoaddition reactions between C60 and N-trimethylsilylmethyl-substituted tertiary amines for synthesis of aminomethyl-1,2-dihydrofullerenes

An efficient and benign method for the preparation of aminomethyl-substituted fullerenes has been developed. The process, involving catalyst free, visible-light irradiation of 10% EtOH-toluene solutions containing fullerene C₆₀ and N-trimethylsilylmethyl-substituted amines by using a 20 W compact fluorescent lamp, leads to formation of aminomethyl-substituted fullerene adducts in a highly efficient manner. The photoaddition reaction takes place via a pathway initiated by visible light absorption by C₆₀, followed by SET from the amine to the triplet excited state of C₆₀. Ethanol-promoted desilylation of the resulting a minimum radical then generates the corresponding α-amino radical which couples with the C₆₀ radical anion to form the anion precursor of the fullerene adducts. The new approach using visible-light takes place under mild conditions and it does not require the use of photocatalysts. Thus, the method developed in this effort could broadens the range of functionalized fullerene derivatives that can be readily prepared.     

Highly efficient and stereoselective cycloaddition of nitrones to indolyl- and pyrrolylacrylates

The reactions of various nitrones with indolyl- and pyrrolylacrylates proceeds regioselectively with high diastereoselectivity in the case of aldonitrones, and represents an effective method for obtaining new indolyl- and pyrrolyl-substituted isoxazolidine carboxylates stabilized by weak (CH?O) and moderate (NH?N) strength intramolecular hydrogen bonding. The resulting cycloadducts exhibit promising in vitro anti-influenza activities.     

Transition metal-free direct amination of benzoxazoles using formamides as nitrogen sources

A transition metal-free method for the direct amination of benzoxazoles using formamides as nitrogen sources is reported, which was mediated by an inexpensive and environmentally friendly tetrabutylammonium iodide/tert-butyl hydroperoxide system and gave the 2-aminobenzoxazole derivatives with moderate to good yields.     

l-Proline-catalyzed five-component domino reaction leading to multifunctionalized 1,2,3,4-tetrahydropyridines

Multifunctionalized 1,2,3,4-tetrahydropyridines are concisely synthesized in good yields via l-proline-catalyzed or l-proline/FeCl₃-cocatalyzed one-pot multicomponent reactions (MCRs). The MCRs involve a domino hydroamination/prins reaction/Mannich-type reaction/intramolecular dehydration-cyclization process. The molecular structure of 5baa, one of multifunctionalized 1,2,3,4-tetrahydropyridines, was confirmed by single-crystal X-ray diffraction.     

Exploring the scope of the Gewald reaction: Expansion to a four-component process

An efficient four-component reaction was developed to take advantage of the reactivity of the 2-aminothiophene-3-carbonitrile functionality, which is obtained during the classical three-component Gewald reaction. Various α-methylene bearing ketones were reacted with malononitrile, elemental sulfur, and aryl/heteroarylnitrile derivatives in t-BuOH/NaOH to afford 2-arylthieno[2,3-d]pyrimidin-4-amines in high yields. Preliminary studies revealed the photophysical properties of the products and their potential for use as metal sensors.