新型达比加群酯衍生物的合成及其抗凝血活性

以3-［(3-氨基-4-甲基氨基苯甲酰)吡啶-2-基氨基］丙酸乙酯为原料,经环合、水解、酰胺化等反应合成了6个新型的达比加群酯衍生物（5a~5f）,其结构经¹H NMR, IR和HR-MS(ESI)表征。研究了5a~5f对凝血活酶抑制活性（IC₅₀）和活化部分凝血活酶时间（aPTT）的抑制作用。结果表明：5a的抗凝血活性最好,其IC₅₀和aPTT分别为1.25±0.1 nmol·L^-1和77.2±1.3 s,优于阳性对照药达比加群酯。     

伊马替尼衍生物的合成及其抗肿瘤活性

以4-硝基-2-氨基甲苯为起始原料,经加成、缩合、环化和还原反应制得中间体N-(2-甲基-5-氨基苯基)-4-(3-吡啶基)嘧啶-2-胺(4),再与取代酰氯反应,合成了7个新型伊马替尼衍生物（5a~5g）,其结构经¹H NMR, ¹³C NMR和HR-MS 表征。采用四甲基偶氮唑盐(MTT)法考察了5对人肝癌细胞(HepG₂)、子宫颈癌细胞（Hela）、肺癌细胞（H460）和乳腺癌细胞（MCF-7）体外抑制活性。结果显示：5e体外抑制活性最优,其IC₅₀分别为10.90±1.00 μmol·L^-1; 8.51±0.90 μmol·L^-1; 13.15±1.11 μmol·L^-1; 14.75±0.78 μmol·L^-1。     

新型4-取代苯胺喹唑啉衍生物的合成与抗肿瘤活性研究

以6-碘喹唑啉-4-酮为原料,经氯代、胺化、Suzuki偶联、Wittig-horner等反应合成了7个新型的4 取代苯胺喹唑啉衍生物(5a~5g),其结构经¹H NMR和HR-MS(ESI)表征。采用MTT法研究了5a~5g对人乳腺癌细胞(MCF-7)、人肺癌细胞(A549)和人皮肤鳞癌细胞（A431）的抑制活性。结果表明：5a~5g对肿瘤细胞均具有明显的抑制活性;其中5e的抑制活性(IC₅₀=0.13~5.26 μmol·L^-1)优于拉帕替尼(IC₅₀=0.21~15.56 μmol·L^-1)。     

哌啶并[2,3-b]哌嗪类衍生物的设计、合成及其抗血小板聚集活性研究

以2,3-二氨基吡啶和2,3-丁二酮为起始原料,经环化、催化氢化和亲核取代反应合成了10个新型哌啶并[2,3-b]哌嗪类衍生物(3a~3j),其结构经¹H NMR、¹³C NMR和HR-MS确证。体外抗血小板聚集活性研究表明,化合物3d、3e、3g、3h和3j具有一定的抗血小板聚集作用,其中化合物3h(IC₅₀=1.24mmol/L)的活性显著优于母体化合物川芎嗪(IC₅₀=3.96mmol/L)和阳性药物阿司匹林(IC₅₀=2.41mmol/L)。     

新型5-取代吲哚-3-甲酰胺化合物的合成

以5-取代吲哚为原料,经维尔斯迈尔-哈克反应制得5-取代吲哚-3-甲醛(2a~2e); 2a~2e在DMF催化下,与盐酸羟胺反应制得5-取代吲哚-3-甲腈（3a~3e）; 3a~3e在H₂O₂和NaOH溶液中水解合成了5-取代吲哚-3-甲酰胺（4a~4e, 4b~4e为新化合物）,产率62.0%~75.0%,其结构经¹H NMR, ¹³C NMR和ESI-MS表征。     

新型2-氨基苯并咪唑类EGFRT790M抑制剂的合成及其生物活性

以1-氟-2-硝基芳烃和反式-4-氨基环己醇盐酸盐为原料,经亲核取代、还原、环化及缩合等反应合成了15个新型的2-氨基苯并咪唑类EGFR^T790M抑制剂(6a~6o),其结构经¹H NMR, ¹³C NMR和HR-MS(ESI)表征。分别采用ELISA法和SRB法测定了6a~6o的体外酪氨酸激酶抑制活性和体外抗肿瘤活性。结果表明：6l对EGFR^T790M/L858R的抑制活性最好,其IC₅₀为45.6±18.8 nmol·L^-1,优于先导化合物N-{1-[(1R,4R)-4-羟基环己基]-7-甲基-1H-苯并[d]咪唑-2-基}-3-(三氟甲基)苯甲酰胺(6,IC₅₀为136.7±9.1 nmol·L^-1),且对EGFR^T790M的选择性高达219倍;6a, 6e, 6h和6i对人肺腺癌细胞(NCI 1975)的抑制活性较好,其IC₅₀值分别为1.929±0.347, 2.168±0.819, 2.335±0.787和1.930±0.529 μmol·L^-1,优于先导化合物6(2.653±1.395 μmol·L^-1)。     

5-苄基-4-叔丁基-2-芳氨基噻唑氢溴酸盐的合成、表征及抗肿瘤活性

以芳香胺和4,4-二甲基-1-芳基-2-溴戊-3-酮为原料, 设计合成了29种新的5-苄基-4-叔丁基-2-芳氨基噻唑氢溴酸盐化合物; 其结构经¹H NMR和元素分析等确证. 体外抗肿瘤活性测试结果表明, 化合物A4, A5, A12和A29对人非小细胞肺癌细胞A549的IC₅₀值分别为0.016, 0.019, 0.019和0.026 μmol/mL, 与阳性对照物紫杉醇(IC₅₀值为0.022 μmol/mL)相当; 化合物A5, A7, A13, A14和A19对肝癌细胞Bel7402的IC₅₀值分别为0.021, 0.021, 0.026, 0.014和0.029 μmol/mL, 与阳性对照物紫杉醇的IC₅₀值(0.030 μmol/mL)相近. 利用倒置显微镜和Hoechst33342-PI双染色法观察了细胞经化合物处理后的形态变化.     

超声辅助合成新型二氢嘧啶-2(1H)-硫酮衍生物及其生物活性研究

以苯乙酮与取代苯甲醛（1a~1e）为起始原料，在碱性条件下制得中间体查尔酮(2a~2e)；在超声辅助下，合成了一系列硫代嘧啶酮类化合物（3a~3e），其中3a、 3d和3e为新化合物，其结构经¹H NMR, ¹³C NMR, IR和MS(ESI)表征。研究了3a~3e对酪氨酸酶和α-葡萄糖苷酶的抑制活性及抗氧化活性。结果表明：4-(2-甲氧基苯基)-6-苯基-3,4-二氢嘧啶-2(1H)=硫酮（3b）抑制酪氨酸酶活性最好，IC₅₀为0.676 mmol·L^-1，与阳性对照曲酸相当。以3b为例进行了抑制酪氨酸酶动力学与分子对接研究。结果表明：3b为竞争型抑制剂，苯环可能为其活性基团。     

新型苯丙氨酸三肽衍生物的合成及其抗乙肝病毒活性

以具有抗HBV活性的苯丙氨酸二肽化合物马蹄金素(MTS)为先导化合物,设计并合成了23个新型的苯丙氨酸三肽衍生物（4a~4h, 5, 6a, 6b和8a~8k）,其结构经¹H NMR, ¹³C NMR和MS(ESI)表征。采用HepG2 2.2.15细胞为乙肝病毒载体,评价了目标化合物的抗HBV活性。结果表明：化合物5（IC₅₀=2.98 μM）、 6b（IC₅₀=0.62 μM）和8k（IC₅₀=5.07 μM）对HBV DNA复制的抑制活性优于MTS（IC₅₀=11.16 μM）。     

新型芳姜黄酮拼合吡咯螺环氧化吲哚类化合物的合成及其抗肿瘤活性

以取代靛红和肌氨酸为原料制得1,3-偶极子,再与(E)-芳姜烯酮类化合物在乙腈中经3+2环加成反应合成了10个新型的芳姜黄酮拼合吡咯螺环氧化吲哚类化合物(3a~3j)产率70%~91%, d/r值15 :1~>20:1,其结构经¹H NMR, ¹³C NMR和HR-MS（ESI-TOF）表征。采用MTT法研究了3a~3j对人肺癌细胞(A549)和人白血病细胞(K562)的体外抗肿瘤活性。结果表明：3f对K562抑制活性较好（IC₅₀=31.1 μmol·L^-1）, 3b对A549抑制活性较好（IC₅₀=54.1 μmol·L^-1）。     

Furyl- and thienyl-silatranes and germatranes

We review our research on the synthesis and study of the physical and biological properties of furyl- and thienylgermatranes and -silatranes.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 6, pp. 725–732, June, 1992.     

Review and patents and literature

The use of the insect cell/baculovirus expression system for producing recombinant proteins of bacterial, plant, insect, and mammalian origin has become widespread. The popularity of this eukaryotic expression system is due to many factors, including (1) potentially high protein expression levels, (2) ease and speed of genetic engineering, (3) ability to accommodate large DNA inserts, (4) protein processing similar to higher eukaryotic cells (e.g., mammalian cells), and (5) ease of insect cell growth (e.g., suspension growth). The following review of the literature discusses two engineering aspects of recombinant protein synthesis by insect cell cultures: bioreactor scale-up and insect cell line selection. Following this review patent abstracts and additional literature pertaining to expression of recombinant proteins in insect cell culture are listed.     

Ground- and excited-state aromaticity and antiaromaticity in benzene and cyclobutadiene

The aromaticity and antiaromaticity of the ground state (S 0), lowest triplet state (T 1), and first singlet excited state (S 1) of benzene, and the ground states (S 0), lowest triplet states (T 1), and the first and second singlet excited states (S 1 and S 2) of square and rectangular cyclobutadiene are assessed using various magnetic criteria including nucleus-independent chemical shifts (NICS), proton shieldings, and magnetic susceptibilities calculated using complete-active-space self-consistent field (CASSCF) wave functions constructed from gauge-including atomic orbitals (GIAOs). These magnetic criteria strongly suggest that, in contrast to the well-known aromaticity of the S 0 state of benzene, the T 1 and S 1 states of this molecule are antiaromatic. In square cyclobutadiene, which is shown to be considerably more antiaromatic than rectangular cyclobutadiene, the magnetic properties of the T 1 and S 1 states allow these to be classified as aromatic. According to the computed magnetic criteria, the T 1 state of rectangular cyclobutadiene is still aromatic, but the S 1 state is antiaromatic, just as the S 2 state of square cyclobutadiene; the S 2 state of rectangular cyclobutadiene is nonaromatic. The results demonstrate that the well-known "triplet aromaticity" of cyclic conjugated hydrocarbons represents a particular case of a broader concept of excited-state aromaticity and antiaromaticity. It is shown that while electronic excitation may lead to increased nuclear shieldings in certain low-lying electronic states, in general its main effect can be expected to be nuclear deshielding, which can be substantial for heavier nuclei.     

Determination and study on residue and dissipation of benazolin-ethyl and quizalofop-p-ethyl in rape and soil

A QuEChERS (quick, easy, cheap, effective, rugged, and safe) method for the determination of benazolin-ethyl and quizalofop-p-ethyl in rape and soil by high-performance liquid chromatography-tandem mass spectrometry has been developed in this study. The residue and dissipation of benazolin-ethyl and quizalofop-p-ethyl in rape and soil were determined with the developed method. The half-lives of benazolin-ethyl in rape straw and soil were 3.7–5.1 days and 14.3–26.3 days, respectively. The half-lives of quizalofop-p-ethyl in rape straw and soil were 5.0-6.1 days and 0.3–9.7 days, respectively. The residue of benazolin-ethyl and quizalofop-p-ethyl in rapeseed and soil were below the detection limit (i.e., 0.5?mg?kg^?1, the maximum residue level of European Union for quizalofop-p-ethyl).     

Syntheses and structures of P-anilino-P-chalcogeno- and P-anilino-P-iminodiazasilaphosphetidines and their group 12 and 13 metal compounds

The P-anilino-P-chalcogeno(imino)diazasilaphosphetidines [Me(2)Si(mu-N(t)Bu)(2)P=E(NHPh)] (E = O (3), S (4), Se (5), N-p-tolyl (6)) were synthesized by oxidizing the P-anilinodiazasilaphosphetidine [Me(2)Si(N(t)Bu)(2)P(NHPh)] (2) with cumene hydroperoxide, sulfur, selenium, and p-tolyl azide, respectively. The lithium salt of 4 reacted with thallium monochloride to produce ([Me(2)Si(mu-N(t)Bu)(2)P=S(NPh)-kappaN-kappaS]Tl)(7), which features a two-coordinate thallium atom. Treatment of 4-6 with AlMe(3) gave the monoligand dimethylaluminum complexes ([Me(2)Si(mu-N(t)Bu)(2)P=E(NPh)-kappaN-kappaE]AlMe(2)) (E = S (8), Se (9), N-p-tolyl (10)), respectively. In these complexes the aluminum atom is tetrahedrally coordinated by one chelating ligand and two methyl groups, as a single-crystal X-ray analysis of 8 showed. A 2 equiv amount of 4-6 reacted with diethylzinc to produce the homoleptic diligand complexes ([Me(2)Si(mu-N(t)Bu)(2)P=E(NPh)-kappaN-kappaE](2)Zn)(E = S (11), Se (12), N-p-tolyl (13)). A crystal-structure analysis of 11 revealed a linear tetraspirocycle with a tetrahedrally coordinated, central zinc atom.     

多环芳二酐型聚酯亚胺膜的透气性能

多环芳二酐型聚酯亚胺膜的透气性能李悦生，丁孟贤，徐纪平（浙江大学高分子科学与工程研究所，杭州，３１００２７）（中国科学院长春应用化学研究所）关键词聚醚酰亚胺，聚酯酰亚胺，膜，透气性通常的聚酰亚胺加工性能较差，在芳环二酐的苯环间引入醚键等柔性基团后，其...