新型2,5-二(取代苯基亚甲基)环戊酮的合成

在碱催化下,环戊酮与芳醛经醇醛缩合反应合成了4个新型的2,5-二(取代苯基亚甲基)环戊酮,其结构经1H NMR,IR,MS和元素分析表征。     

1-苄基-3-[α-羟基-(未)取代苄基叶立德]吡咯啉- 2,4-二酮的合成与生物活性

为了发现具有高除草活性的对羟基苯基丙酮酸双氧化酶抑制剂(简称HPPD, EC 1.13. 11.27), 利用由不同的芳香羧酸和乙酰乙酸乙酯为原料得到的不同的β-酮酸酯与N-苄基甘氨酸乙酯反应得到12个未见文献报道的1-苄基-3-[α-羟基-(未)取代苄基叶立德]吡咯啉-2,4-二酮化合物, 其结构均经过¹H NMR, IR和元素分析确证. 在活性测定方面, 采用了对不同的作用机制敏感的油菜平皿法和稗草小杯法. 初步生物活性测试结果表明, 其生长抑制活性高于对照药HPPD抑制剂磺草酮. 但磺草酮所表现出来的明显白化作用, 在这一类化合物只显示出微弱的缺绿现象, 这也许说明所合成的化合物除显示出较弱的HPPD抑制剂的特征外, 可能还具有生长抑制作用, 而且活性与结构之间存在着一定的构效关系.     

新型3-羟亚甲基吡咯烷-2,4-二酮衍生物的合成与除草活性研究

为了进一步研究3-羟亚甲基吡咯烷-2,4-二酮类化合物构效关系, 以期发现高活性化合物, 利用19种酮酸酯与氨基酸酯合成了19个未见文献报道的新型3-羟亚甲基吡咯烷-2,4-二酮衍生物, 其结构均经过¹H NMR, IR和元素分析确证. 初步生物活性测试结果表明, 其生长抑制活性高于对照药HPPD抑制剂磺草酮. 与已报道的高活性化合物相比, 对油菜的抑制率明显得到提高, 但对稗草的生长抑制没有明显的改善.     

新型2-芳基-4-烷基噻唑甲酸衍生物的设计、合成与生物活性研究

为了发现具有良好生物活性的新型先导化合物,通过活性亚结构拼接方法,在保留噻唑菌胺、甲噻灵和噻氟菌胺等中的1,3-噻唑-5-羰基活性部分,将具有良好生物多样性的苯氧乙酸酯基团引入,设计合成了一系列含苯氧乙酸酯基团结构的1,3-噻唑类化合物.以β-酮酸酯和对羟基硫代苯甲酰胺为原料,经6步反应制得目标物,其结构经1H NMR,IR及高分辨质谱确证,并对该类化合物合成方法进行了探讨.初步生测结果表明,部分化合物对小麦赤霉表现出明显的抑制活性,在50μg/mL浓度下对小麦赤霉的抑制率达到52%.     

5-溴-2-羟基苯甲酰基取代芳醛腙的合成、表征及抑菌活性

以水杨酸甲酯为原料,先经溴化反应制得5-溴水杨酸甲酯,再经肼解反应制得5-溴-2-羟基苯甲酰肼,再与取代芳香醛缩合反应,制得7种5-溴-2-羟基苯甲酰基取代芳醛腙,其中3种为新化合物. 化合物的结构经IR、1H NMR、MS与元素分析测试技术表征确证. 抑菌测试表明,该类化合物对不同菌株的抑菌活性具有明显的选择性;在质量浓度为0.05%时,上述化合物对白色念珠菌、枯草芽孢杆菌的抑菌率高达100%,具有强抑菌活性,是一类极具潜力的抗真菌、抗革兰氏阳性菌的化合物. 5-溴-2-羟基苯基-3′,5′-二溴-2-羟基苯甲醛腙的抗菌活性接近广谱高效杀菌剂三氯生. 构效分析表明,化合物的抑菌活性与Ar环及其取代基性质有关,引入呋喃环、Ar环邻、对位引入-OH、-OCH_3等供电基容易导致化合物抑菌活性降低,Ar环的间位引入Cl、Br等卤素原子能够提高化合物的抑菌活性.     

N-取代苯甲酰基-N′-(2-呋喃甲酰胺基)硫脲的合成与除草活研究

以取代苯甲酸为原料,经酰氯化、酰化反应得到中间体取代苯甲酰基异硫氰酸酯,再与糠酰肼经加成反应合成了7个N-取代苯甲酰基-N′-(2-呋喃甲酰胺基)硫脲类化合物6a～6g,其中5个未见文献报道。通过¹H NMR、¹³C NMR、MS和元素分析确证其结构。采用油菜平皿法测定目标化合物的除草活性,测试结果表明大部分目标化合物具有较强的除草活性。其中,化合物6a在100 mg·L^-1下对反枝苋、鬼针草、稗草和龙爪茅的根抑制率均达90%以上。     

2,2—二取代—5—亚苄（糠）基环戊酮类化合物的合成及其生物活性

合成了１８种２，２－二取代－５－亚苄（糠）基环戊酮类化合物，结构均通过核磁、红外、元素分析等予以确证．初步药理实验结果显示：该类化合物对鼻咽癌、结肠癌、卵巢癌和肺腺癌等癌细胞具有一定的抑制作用；某些化合物还有杀菌作用．     

含喹唑啉二酮片段的新型三酮类化合物的合成及生物活性

对羟苯基丙酮酸双氧化酶(EC 1.13.11.27, HPPD)是一个重要的除草剂作用靶标. 为了寻找具有高效除草活性的新型HPPD抑制剂, 在前期研究的基础上设计合成了24个含有喹唑啉二酮结构的三酮类化合物9a～9x. 所合成的化合物均经过¹H NMR, ¹³C NMR和 HRMS的表征. 以来源于拟南芥的HPPD (AtHPPD)为测试对象进行酶抑制活性筛选, 结果表明所合成的大部分化合物对AtHPPD均表现出了较好的抑制效果, 其中化合物9i的K_i 值为0.005 μmol/L, 显著优于商品化对照药剂硝磺草酮(K_i=0.013 μmol/L). 进一步温室盆栽筛选结果表明, 多数化合物在150 g ai/ha的剂量下对六种供试杂草中的至少一种表现出80%以上的防效, 特别是化合物9g在37.5 g ai/ha的低剂量下对所测试的六种杂草中的四种仍表现出了大于85%的抑制效果, 同时9g 在150 g ai/ha的剂量下对水稻和小麦均表现出了很好的作物安全性, 可以作为先导化合物供进一步深入研究.     

N-(1,2,4-三唑并[1,5-a]嘧啶-2-基)-N′-芳酰基硫脲的合成与生物活性

通过2-氨基-5,7-二甲基-1,2,4-三唑并[1,5-a]嘧啶同芳酰基异硫氰酸酯反应, 合成了12种新的含杂环基的芳酰基硫脲, 用红外光谱、核磁共振氢谱和元素分析确证了其结构, 初步的生物活性测定试验表明部分目标化合物具有良好的生物活性, 尤其是对于双子叶植物表现出较高的除草活性.     

新型含苯基取代嘧啶基磺酰脲衍生物的设计、 合成及生物活性

将苯基引入到嘧啶环的4位, 设计、 合成了2个系列共24个结构新颖的磺酰脲类衍生物, 并对其生物活性进行了研究. 抑菌实验结果表明, 目标化合物对苹果轮纹病菌和小麦纹枯病菌表现出优异的抑制率, 其中化合物9f对5种病菌的抑制率均超过65%. 进一步研究发现, 化合物9f对苹果轮纹病菌的EC₅₀值为8.63 mg/L, 略高于对照药百菌清(7.33 mg/L); 化合物8k和9k对小麦纹枯病菌的EC₅₀值分别为5.48和6.09 mg/L, 与百菌清(4.26 mg/L)接近. 同时, 盆栽法除草测试结果表明, 在75 g/ha剂量下, 化合物8d和9d对油菜具有较好的芽前除草活性, 分别为86%和73%; 化合物9h对反枝苋的土壤处理抑制活性为100%, 优于对照药氯磺隆(96%).     

Synthesis and Bioactivity of Some Novel 5-Arylmethylideneamino-1,3,4-Thiadiazole-2- Ylthioacetanilide Derivatives

Abstract

Some novel of 5-arylmethylideneamino-1,3,4-thiadiazole-2-ylsulfanyl acetamide derivatives were synthesized by the S-alkylation of 5-arylmethylideneamino-2-mercapto-1,3,4-thiadiazoles with chloroacetyl anilide under solid–liquid phase transfer catalysis using polyethylene glycol-400 (PEG-400) catalyst in the presence of potassium carbonate. Some of the title compounds were investigated for plant growth-regulating activity. They were found to enhance root elongation remarkably at a low concentration.

[Supplemental materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfur, and Silicon and the Related Elements to view the following free supplemental files: Additional figures and tables].     

Synthesis and Bioactivity Evaluation of Novel N-Pyridylpyrazolemethanamine Derivatives

To further explore the structure-activity relationship(SAR) of amide bridge moeity of anthranilic diamides derivatives, a series of N-pyridylpyrazole derivatives was designed, synthesized and their biological activities were evaluated. The chemical structures of novel target compounds were confirmed by ¹H nuclear magnetic resonance (NMR), ¹³C NMR and elemental analyses(EA). Bioassay results of insecticidal activity demonstrated that the target compound 6h displayed 70% lethality rate against oriental armyworms at 200 mg/L. Moreover, most compounds displayed moderate to excellent antifungicidal activities against Fusarium oxysporum f. sp. cucumerinum, Cercospora arachidicola Hori, Botryosphaeria dothidea, Alternaria solani, Gibberella zeae and Phytophthora capsici at 50 mg/L. In particular, compound 6e showed 61.5% and 92.3% inhibition rate against Cercospora arachidicola Hori and Botryosphaeria dothidea, which was superior to the commercial positive control Chlorothalonil. These results will provide a potential clue for exploring novel high-effective agrochemicals.     

Novel Thiochromanone Derivatives Containing a Sulfonyl Hydrazone Moiety: Design,Synthesis, and Bioactivity Evaluation

A series of novel thiochromanone derivatives containing a sulfonyl hydrazone moiety were designed and synthesized. Their structures were determined by ¹H-NMR, ¹³C-NMR, and HRMS. Bioassay results showed that most of the target compounds revealed moderate to good antibacterial activities against Xanthomonas oryzae pv. oryzae, Xanthomonas oryzae pv. oryzicolaby, and Xanthomonas axonopodis pv. citri. Compound 4i had the best inhibitory activity against Xanthomonas oryzae pv. oryzae, Xanthomonas oryzae pv. oryzicolaby, and Xanthomonas axonopodis pv. citri, with the EC₅₀ values of 8.67, 12.65, and 10.62 μg/mL, which were superior to those of Bismerthiazol and Thiodiazole-copper. Meanwhile, bioassay results showed that all of the target compounds proved to have lower antifungal activities against Sclerotinia sclerotiorum, Fusarium oxysporum, Gibberella zeae, Rhizoctonia solani, Verticillium dahlia, and Botrytis cinerea than those of Carbendazim.     

Synthesis and Anticoagulant Bioactivity Evaluation of 1, 2, 5-Trisubstituted Benzimidazole Fluorinated Derivatives

Some 1,2,5-trisubstituted benzimidazole fluorinated derivatives were designed and screened by molecular docking. Five compounds which obtained high scores were selected to synthesize. All the target products were char-acterized by ¹H NMR, ¹³C NMR and high resolution mass spectra(HRMS) and preliminarily screened for inhibitory activity against thrombin, among which three compounds(5a, 5c and 5e) were evaluated in vitro. The results showed that compounds 5a, 5c and 5e exhibited better anticoagulant activity than argatroban. Docking simulations demonstrated that these compounds may act as candidates for further studies on thrombin inhibitors.     

1,2,3—噻二唑衍生物的合成及其生物活性

自1976年Arndt等合成植物生长调节剂噻苯隆[1]似来，有关含1，2，3一噻二唑化0合物的生物活性的研究就不断有报道[2～5]．为了寻找新的具有较好生物活性的化合物，本文以5-氨基-1，2，3-噻二唑为中间体合成了5种不同取代基的磺酰脲类化合物、3种SChiff碱类化合物及吡唑类、酰亚胺类化合物各1种，共10种新化合物．其反应式如下：1实验部分MT－3型元素分析仪；Schimadzu-IR-435型红外光谱仪，KBr压片；Jeolfx－90Q型或BrukerAC－P200型核磁共振仪（CDCI。，DMSO－de，TMS）；VGZAB－HS型质谱仪；Yanaco熔点仪（温度计未经校正）…     

Design,Synthesis and Insecticidal Activities of Novel 5-Alkoxyfuran-2(5H)-one Derivatives

A series of novel 5?alkoxyfuran-2(5H)-one derivatives was synthesized, and characterized by 1H NMR, 13C NMR and HRMS. Biological activities of all the title compounds were evaluated systematically. Preliminary bioassays indicated that most of the compounds exhibited moderate insecticidal activities against Aphis craccivora and Nilaparvata lugens at 100 mg/L. Compounds 4h and 4w exhibited 100% mortality rate against Aphis craccivora at 100 mg/L, and compound 4h exhibited good mortality rate against Aphis craccivora and Nilaparvata lugens (60% and 75%, respectively) even at 4 mg/L. The results demonstrated the impact of various chemical groups on insecticidal activities and provided a potential clue for further exploring novel high-effective broad-spectrum insecticides.     

新型双杂环修饰的酰胺硫醚衍生物的合成和生物活性

首次设计并合成了16个新型1,2,4-三唑与1,3,4-噻二唑双杂环修饰的酰胺硫醚衍生物,并对其进行了结构表征。分别评价了目标分子对蛋白酪氨酸磷酸酶1B(PTP1B)和细胞分裂周期25磷酸酶B(Cdc25B)抑制活性,结果发现:16个目标分子对PTP1B具有良好的抑制活性,其中8-C-d和8-D-c的抑制作用最佳,半抑制浓度(IC_(50)值)分别为(1.19±0.22)mg/L和(1.08±0.09)mg/L,优于阳性参照物齐墩果酸(IC_(50)=(1.27±0.19)mg/L),有望作为抗糖尿病药物先导物;对Cdc25B抑制活性测试中,11个目标分子表现出良好的活性,其中8-A-d、8-C-d和8-D-c抑制活性的IC_(50)值分别为(0.97±0.05)、(1.06±0.03)和(0.94±0.11)mg/L,低于阳性参照物Na_3VO_4(IC_(50)=(1.25±0.14)mg/L),有望作为抗肿瘤药物先导物。     

Design, Synthesis and Biological Evaluation of 2-Aroyl-3-aryl-6,7-dihydro-5H-furo[3,2-g]chromen Derivatives as a Novel Series of Estrogen Receptor Modulators

Based on the principles of the bioisosterism, combination of the active substructures of selective estrogen receptor modulators which are currently therapeutic agents available for the prevention and treatment of various es-trogen dependent diseases, and structural optimization, a novel series of 2-aroyl-3-aryl-6,7-dihydro-5H-furo[3,2-g]-chromen derivatives was designed as potent selective estrogen receptor modulators via molecular docking. The target compounds have been synthesized, and characterized by IR...