共查询到19条相似文献,搜索用时 78 毫秒
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采用比较分子力场分析(CoMFA)和比较分子相似因子分析(CoMSIA)方法,对训练集中的26个楝酰胺(Rocaglamide)类化合物进行了三维定量构效关系(3D-QSAR)研究,最终建立的CoMFA模型和CoMSlA模型的q<'2>分别为0.593和0.656.并对测试集中的5个化合物的生物活性进行了预测,结果表明... 相似文献
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利用中间体衍生化方法, 将噻吩环引入到双酰胺类化合物中, 合成了一系列取代噻吩双酰胺类化合物1~3; 目标化合物的结构经核磁共振波谱、 红外光谱及元素分析确认. 生物活性测试结果表明, 化合物1在600 mg/L剂量下对小菜蛾具有良好的杀虫效果, 致死率均为100%, 其中化合物1a和1e在20 mg/L剂量下对小菜蛾的致死率仍达到60%以上; 改变双酰胺结构中的吡唑环得到化合物2和3, 其杀虫活性消失, 说明该类化合物中吡唑环结构对杀虫活性具有关键作用. 相似文献
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根据已知的激酶变构抑制剂与其靶点激酶的X射线共晶结构,设计了一系列以吡啶联异噁唑为中心结构的潜在激酶变构抑制剂.以2-甲基-5-硝基-3-吡啶甲酸甲酯为原料,通过形成酰胺、磺酰胺和连接嘧啶片段等衍生化手段合成了21个新的吡啶联异噁唑类化合物,其结构经1H NMR,13C NMR和MS确证.采用噻唑蓝(MTT)法测试了所合成化合物的体外抗肿瘤活性,初步测试结果表明该类化合物对肿瘤细胞的增长具有显著的抑制作用. 相似文献
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α—取代乙酰胺类化合物结构与除草活性的构效关系研究 总被引:1,自引:0,他引:1
分别研究了N,N-二取代-α-氯代乙酰胺类化合物及N,N-二取代-α-二硫代磷酰基之酰胺类化合物结构与除草活性的定量关系,结果表明,氮原子上取代基的大小对两类化合物的除草活性具有相同的影响,只是最适宜的疏水性不同,两类化合物可能具有相同的作用机制。 相似文献
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以双炔酰菌胺为模板, 利用"基团反转"原理将酰胺中的羰基和氮原子交换位置, 设计了一系列苯乙酰儿茶酚胺类化合物. 从取代苯乙酮出发, 经过溴代、 胺化、 还原制备2-氨基-1-取代苯乙醇(6), 然后与取代苯乙酸反应制备酰胺(7), 最后经烷基化得到一系列保持氮原子位置不变的N-(2-烷氧基-2-取代苯基乙基)苯乙酰胺类化合物(8). 所有目标化合物均通过核磁共振氢谱、 元素分析或高分辨质谱确认, 并测试了其生物活性. 结果表明, 部分化合物对黄瓜霜霉病具有较好的防治活性, 化合物8k在浓度为100 μg/mL时对黄瓜霜霉防效可达75%. 研究还发现, 该类化合物均对蚜虫具有较好的防治效果. 相似文献
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Fast anionic oxy-Cope rearrangements of 1,5-hexadiyn-3,4-olates can be incorporated into cascade transformations which rapidly assemble densely functionalized cyclobutenes or cyclopentenones via a common bis-allenic intermediate. The competition between fragmentation, 4π-electrocyclic closure, and aldol condensation can be efficiently controlled by the nature of the acetylenic substituents. The rearrangement of bis-alkynes with two hydroxyl substituents opens a conceptually interesting entry in the chemistry of ε-dicarbonyl compounds and suggests a new approach to analogues of rocaglamide/aglafolin. 相似文献
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Synthesis of Each Enantiomer of Rocaglamide by Means of a Palladium(0)‐Catalyzed Nazarov‐Type Cyclization 下载免费PDF全文
Zhe Zhou Prof. Dr. Marcus A. Tius 《Angewandte Chemie (International ed. in English)》2015,54(20):6037-6040
A recently reported Pd0‐catalyzed asymmetric Nazarov‐type cyclization has been successfully applied in the key step of the first catalytic asymmetric total synthesis of (?)‐rocaglamide (natural) and (+)‐rocaglamide. The stereochemistry at the C3 position that controls the stereochemistry of all other stereocenters is determined in the cyclization step. This versatile and modular synthesis proceeds from simple reagents. 相似文献
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Dr. Zhe Zhou Dr. Darryl D. Dixon Dr. Anais Jolit Prof. Dr. Marcus A. Tius 《Chemistry (Weinheim an der Bergstrasse, Germany)》2016,22(44):15929-15936
The complex flavagline, (?)‐rocaglamide, possesses a synthetically intriguing tricyclic scaffold with five contiguous stereocenters and also exhibits potent anticancer, anti‐inflammatory and insecticidal activity. This full account details distinct approaches to (±)‐ and (?)‐rocaglamide utilizing Brønsted acid catalyzed and asymmetric Pd0‐catalyzed Nazarov chemistry developed in our laboratory, respectively. The successful asymmetric synthesis revealed unforeseen mechanistic complexity that required adjusting our strategy to overcome an unanticipated racemization process, an unusual reversible ring‐cleavage step and a very facile trialkylsilyl group migration. 相似文献
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Xianyou Wang Zhuoqun Xie Bin Fu Nan Li Mingan Wang Yongqiang Ma Fengpei Du Yanjun Xu Zhaohai Qin 《Journal of heterocyclic chemistry》2014,51(5):1430-1434
The synthesis of the key intermediate of rocaglamide, oxidative aglafolin, was studied, and its diastereoisomers were obtained. The amination of oxidative aglafolin was also investigated, affording amino derivatives. The preliminary bioassay results indicate that these new aglafolin derivatives showed certain degree of insecticidal and repellent activity against Plutella xylostella and Laphygma exigua. 相似文献
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Gerard B Sangji S O'Leary DJ Porco JA 《Journal of the American Chemical Society》2006,128(24):7754-7755
Enantioselective syntheses of methyl rocaglate and the related natural products rocaglamide and rocaglaol are outlined. The approach involves enantioselective [3 + 2] photocycloaddition promoted by chiral Br?nsted acids (TADDOLs) to afford an aglain precursor followed by a ketol shift/reduction sequence to the rocaglate core. 相似文献
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Two new rocaglamide derivatives, 1-O-formylrocagloic acid (1) and 3'-hydroxy rocagloic acid (2), together with five known compounds, rocaglaol (3), rocagloic acid (4), 3'-hydroxymethylrocaglate (5), 1-O-formylmethyl rocaglate (6), and methylrocaglate (7), were isolated from the fruits of Amoora cucullata. Their structures were elucidated by spectroscopic methods. Compounds 1-3, 6, and 7 exhibited potent cytotoxicity against KB, BC, and NCI-H187 cell lines, whereas 4 and 5 showed selective cytotoxicity against NCI-H187 cell line. 相似文献
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Chemical and biological properties of carzinophilin congeners obtained in the course of our synthetic studies were investigated. These studies revealed feasibility for the use of some analogues as a double alkylating agent. Further, analogues carrying the naphthalene and the epoxide parts were found to show remarkable in vitro cytotoxicity and in vivo antitumor activity. 相似文献
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Amol A. Nagargoje Satish V. Akolkar Madiha M. Siddiqui Aditi V. Bagade Kisan M. Kodam Jaiprakash N. Sangshetti Manoj G. Damale Bapurao B. Shingate 《中国化学会会志》2019,66(12):1658-1665
A series of pyrazole‐incorporated monocarbonyl analogues of curcumin were synthesized via Clasien–Schimidt‐type condensation and subsequently screened for in vitro antiproliferative and antioxidant activity. The analogues 4c, 5d, 5e, 5g, 6e, and 6f showed potential activity against the MDA‐MB‐231 cell line. The synthesized analogues were also screened for their antioxidant activity. Compounds 5a , 5e , 6d, and 6f exhibit comparable radical scavenging activity with respect to the standard drug ascorbic acid. Furthermore, a molecular docking study has been conducted for 5d and 5g and suggests that these compounds have a potential to become lead molecules in drug discovery and process. 相似文献
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The literature data and the results of our own investigations on the comparative study of the biological activity of isostructural organogermanium and organosilicon compounds have been summarized. It has been shown that the series of organogermanium and organosilicon compounds is more active than the carbon analogues, the majority of organogermanium compounds are less toxic than the sila analogues, the biological activity of the compounds under study appears to be similar but can dramatically differ in the degree of activity, and, moreover, in some particular cases sila and germa analogues exhibit the opposite biological effects. 相似文献