N-5-(1H-1,2,4-三唑基)-N′-芳甲酰基脲的合成与生物活性

以5-氨基-1H-1,2,4-三唑-3-羧酸与酰基异氰酸酯反应,合成了15个新的N-5-(1H-1,2,4-三唑基)-N′-芳甲酰基脲,用核磁共振氢谱、红外光谱和元素分析确证了其结构,并进行了室内生物活性测试.生测试验证明部分酰基脲类化合物具有良好的植物生长调节活性,其中N-5-(3-羧基-1,2,4-三唑基)-N′-o-氯苯甲酰基脲、N-5-(3-羧基-1,2,4-三唑基)-N′-o-溴苯甲酰基脲和N-5-(3-羧基-1,2,4-三唑基)-N′-P(或m)-甲基苯甲酰基脲具有优良的生长素活性.     

N-（1H-3-羧基-1，2，4-三唑-5-基）-N′-芳氧乙酰基脲的合成及生物活性

通过5-氨基-1，2，4-三唑-3-羧酸与芳氧乙酰基异氰酸酯反应，合成了9个新的N-(1H-3-羧基-1，2，4-三唑-5-基)-N′-芳氧乙酰基脲，用核磁共振氢谱、红外光谱和元素分析证明了目标化合物的结构．室内的生物活性测定试验证明，部分目标化合物具有良好的植物生长调节活性．     

N-(4,6-二取代嘧啶-2-基)-N'-(1-甲基-3-乙基-4-氯吡唑-5-基)甲酰基(硫)脲的合成及生物活性

利用活性结构拼接原理,将高效杀螨剂吡螨胺分子的吡唑环部分引入酰基（硫）脲化合物中,以1-甲基-3-乙基-4-氯-5-甲酸基吡唑和2-氨基-4,6-二取代嘧啶为起始原料,通过多步反应合成了5种N-（4,6-二取代嘧啶-2-基）-N’-（1-甲基-3-乙基-4-氯吡唑-5-基）甲酰基脲和5个N-（4,6-二取代嘧啶-2．基）-N’-（1．甲基-3-乙基-4-氯吡唑-5-基）甲酰基硫脲化合物,其化合物结构经IR、^1HNMR及元素分析测试技术确证。初步生物活性试验表明,在50mg／L质量浓度下目标化合物的杀螨活性不太理想,但有些化合物具有较好的除草活性,其中化合物Ib、Ic和Ie对稗草主根的生长抑制率大于60％。     

N-(1H-3-羧基-1,2,4-三唑-5-基)-N''''-芳氧乙酰基脲的合成及生物活性

通过5-氨基-1,2,4-三唑-3-羧酸与芳氧乙酰基异氰酸酯反应,合成了9个新的N-(1H-3-羧基-1,2,4-三唑-5-基)-N'-芳氧乙酰基脲,用核磁共振氢谱、红外光谱和元素分析证明了目标化合物的结构.室内的生物活性测定试验证明,部分目标化合物具有良好的植物生长调节活性.     

N-取代苯基-N′-（1-甲基-3-乙基-4-氯-5-吡唑甲酰基）（硫）脲的合成及其杀螨活性

利用活性结构拼接原理,将高效杀螨剂吡螨胺分子的吡唑环部分引入酰基(硫)脲化合物的分子中,合成了6个新的N-取代苯基-N′-(1-甲基-3-乙基-4-氯-5-吡唑甲酰基)脲(2a~2f)和6个新的N-取代苯基-N′-(1-甲基-3-乙基-4-氯-5-吡唑甲酰基)硫脲(3a~3f),收率44%~89%。2和3的结构经1H NMR,IR和元素分析表征。用叶片浸液法测定了2和3对红蜘蛛的毒杀作用,初步实验结果表明它们有一定的杀螨活性。     

N-(4,6-二取代嘧啶-2-基)-N′-(1-甲基-3-乙基-4-氯吡唑-5-基)甲酰基(硫)脲的合成及生物活性

利用活性结构拼接原理,将高效杀螨剂吡螨胺分子的吡唑环部分引入酰基(硫)脲化合物中,以1-甲基-3-乙基-4-氯-5-甲酸基吡唑和2-氨基-4,6-二取代嘧啶为起始原料,通过多步反应合成了5种N-(4,6-二取代嘧啶-2-基)-N′-(1-甲基-3-乙基-4-氯吡唑-5-基)甲酰基脲和5个N-(4,6-二取代嘧啶-2-基)-N′-(1-甲基-3-乙基-4-氯吡唑-5-基)甲酰基硫脲化合物,其化合物结构经IR、1HNMR及元素分析测试技术确证。初步生物活性试验表明,在50mg/L质量浓度下目标化合物的杀螨活性不太理想,但有些化合物具有较好的除草活性,其中化合物Ⅰb、Ⅰc和Ⅰe对稗草主根的生长抑制率大于60%。     

N-取代苯基-N''''-(1-甲基-3-乙基-4-氯-5-吡唑甲酰基)(硫)脲的合成及其杀螨活性

利用活性结构拼接原理,将高效杀螨剂吡螨胺分子的吡唑环部分引入酰基(硫)脲化合物的分子中,合成了6个新的N-取代苯基-N'-(1-甲基-3-乙基-4-氯-5-吡唑甲酰基)脲(2a～2f)和6个新的N-取代苯基-N'-(1-甲基-3-乙基-4-氯-5-吡唑甲酰基)硫脲(3a～3f),收率44%～89%.2和3的结构经1H NMR,IR和元素分析表征.用叶片浸液法测定了2和3对红蜘蛛的毒杀作用,初步实验结果表明它们有一定的杀螨活性.     

N-取代2-(5-氯-2-(金刚基-1-基)-1H-吲哚-3-基)-2-氧代乙酰胺衍生物的合成及其细胞毒活性

以金刚烷甲酰氯为起始原料,经亲核取代、吲哚环合及酰化反应制得中间体2-(5-氯-2-金刚烷-1H-吲哚-3-基)-2-氧代乙酰（4）; 4与取代胺反应合成了14个新的N-取代2-(5-氯-2-(金刚基-1-基)-1H-吲哚-3-基)-2-氧代乙酰胺衍生物(5a~5n),其结构经¹H NMR, ¹³C NMR和HR-MS(ESI)表征。采用MTT法研究了化合物对人子宫颈癌细胞（Hela）、乳腺癌细胞（MCF-7）和人肝癌细胞（HepG-2）的体外抗肿瘤活性。结果显示：化合物2-(5-氯-2-金刚烷-1H-吲哚-3-基)-N-(3-氯-4-氟苯基)-2-氧代乙酰胺（5e）的体外抑制活性最优,IC₅₀分别为14.10、 10.56和8.55 μmol·L^-1。     

微波促进下1-芳甲酰基-4-（2’-苯并呋喃甲酰基）氨基硫脲及其衍生物的合成

微波辐射条件下，首先由2-苯并呋喃甲酰氯在相转移条件下依次与硫氰酸铵和 芳甲酰肼反应合成了一系列1-芳甲酰基-4-（2’-苯并呋喃甲酰基）氨基硫脲，进 一步在微波辐射的条件下由这些氨基硫脲分别与碘酸钾、醋酸或醋酸汞等试剂作用 高产率地制得了1-芳甲酰基-4-（2’-苯并呋喃甲酰基）氨基脲、2-芳基-5-（2’- 苯并呋喃甲酰胺基）-1，3，4-噻二唑和2-芳基-5-（2’-苯并呋喃甲酰胺基）-1， 3，4-（口恶）二唑。     

含芳基三氮唑结构的3-乙砜基吡啶类化合物的合成及杀虫活性研究

以3,6-二氯吡啶-2-羧酸为起始原料,依据活性亚结构拼接原理,设计合成了结构新颖的含芳基三氮唑结构的3-乙砜基吡啶类化合物,所有目标化合物均经1HNMR, 13CNMR和HRMS结构表征.初步杀虫活性测试结果表明,在500mg/L浓度下,目标化合物均对玉米粘虫(Mythimnaseparatawalker)表现出良好的致死活性,2-(3-(2,6-二氟苯基)-1-甲基-1H-1,2,4-三唑-5-基)-3-(乙基磺酰基)-6-(吡咯烷-1-基)吡啶(9c),N-(仲丁基)-6-(3-(2,6-二氟苯基)-1-甲基-1H-1,2,4-三唑-5-基)-5-(乙基磺酰基)吡啶-2-胺(9g),6-(3-(2,6-二氟苯基)-1-甲基-1H-1,2,4-三唑-5-基)-5-(乙基磺酰基)-N-异丁基吡啶-2-胺(9h)在100 mg/L时,致死率仍达到80%.     

Studies on cardiotonic agents. V. Synthesis of 1-(6,7-dimethoxy-4-quinazolinyl)piperidine derivatives carrying various 5-membered heterocyclic rings at the 4-position

A series of 1-(6,7-dimethoxy-4-quinazolinyl)piperidines carrying various 5-membered heterocycles at the 4-position was synthesized and examined for cardiotonic activity in anesthesized dogs. The (4-oxo-2-thioxo-3-imidazolindinyl)amino derivatives showed the most potent inotropic activity. Marked loss of activity was observed in the 2,4-dihydro-3-thioxo-3H-1,2,4-triazolyl, the 2,4-dihydro-3-oxo-3H-pyrazolyl and the (2,3-dihydro-2-thioxo-3H-1,3,4-thiadiazol-5-yl)amino derivatives. The synthesis and structure-activity relationships are discussed.     

含1,2,3-三氮唑结构的1,5-苯并硫氮杂[艹卓]的合成及其抑真菌活性

设计合成了三类含1,2,3-三氮唑结构的1,5-苯并硫氮杂[艹卓]化合物3-(1H-1,2,3-三氮唑)-4-芳基-2,5-二氢-1,5-苯并硫氮杂[艹卓](5a^5f)、3-(2H-1,2,3-三氮唑)-4-芳基-2,3-二氢-1,5-苯并硫氮杂[艹卓](6a^6f)和3-(1H-1,2,3-三氮唑)-4-芳基-2,3,4,5-四氢-1,5-苯并硫氮杂[艹卓](7a^7f).研究了中间体及目标产物的合成条件,分离出其中两个副产物并进行了结构确定.目标产物的抑真菌活性测试表明,化合物5a^5f对真菌具有良好的抑制作用,对新生隐球菌的抑制效果尤为突出.初步抑真菌构效关系研究表明, 1H-1,2,3-三氮唑环和C=C双键是化合物5a^5f抑真菌活性的关键官能团.     

Novel one-step synthesis of thiazolo[3,2-b]1,2,4-triazoles

[reaction: see text] Reactions of chalcones 3a-f with bis(1H-1,2,4-triazolyl) sulfoxide 4 formed the thiazolo[3,2-b]1,2,4-triazoles 5a-f, which resemble closely some previously prepared COX-2 inhibitors. The structure of 5a was confirmed by X-ray analysis.     

Biological and Cheminformatics Studies of Newly Designed Triazole Based Derivatives as Potent Inhibitors against Mushroom Tyrosinase

A series of nine novel 1,2,4-triazole based compounds were synthesized through a multistep reaction pathway and their structures were scrutinized by using spectral methods such as FTIR, LC-MS, 1H NMR, and 13C NMR. The synthesized derivatives were screened for inhibitory activity against the mushroom tyrosinase and we found that all the synthesized compounds demonstrated decent inhibitory activity against tyrosinase. However, among the series of compounds, N-(4-fluorophenyl)-2-(5-(2-fluorophenyl)-4-(4-fluorophenyl)-4H-1,2,4-triazol-3-ylthio) acetamide exhibited more prominent activity when accompanied with the standard drug kojic acid. Furthermore, the molecular docking studies identified the interaction profile of all synthesized derivatives at the active site of tyrosinase. Based on these results, N-(4-fluorophenyl)-2-(5-(2-fluorophenyl)-4-(4-fluorophenyl)-4H-1,2,4-triazol-3-ylthio) acetamide could be used as a novel scaffold to design some new drugs against melanogenesis.     

Synthesis of new 1H-1,2,4-triazolylcoumarins and their antitumor and anti-HIV activities

A variety of 7-[(1,5-dialkyl-1H-1,2,4-triazolyl)methoxy(and methyl)]coumarins were synthesized from cycloaddition of 2-(2H-benzopyran-7-yloxy)acetonitrile and 2-(5-methoxy-4-methyl-2H-benzopyran-7-yloxy)acetonitrile, respectively, with various reactive cumulene intermediates via spontaneous rearrangements. The anticancer (breast, lung, CNS cancers) and antiviral (HIV-1, HIV-2) properties of some compounds were investigated in vitro. 5-Methoxy-4-methyl-7-[(6,7,8,9-tetrahydro-5H-[1,2,4]triazolo[1,5-a]azepin-2-yl)methyl]coumarin showed some inhibition of HIV-1. Published in Khimiya Geterotsiklicheskikh Soedinenii, No. 5, pp. 669–678, May, 2006.     

Reactivity of N-(1,2,4-triazolyl)-substituted 1,2,3-triazoles

Synthetically useful rhodium(II) carbenes were obtained from N-(1,2,4-triazolyl)-substituted 1,2,3-triazoles and Rh(II) carboxylates. The electron-withdrawing 1,2,4-triazolyl group reveals the heretofore unknown reactivity of nonsulfonyl 1,2,3-triazoles, which exhibit the reactivity of diazo compounds. The resulting carbenes provide ready asymmetric access to secondary homoaminocyclopropanes (80-95% ee, dr >20:1) via reactions with olefins and also engage in efficient transannulation reactions with nitriles.     

Synthesis and biological activity of some novel derivatives of 4-amino-3-(D-galactopentitol-1-yl)-5-mercapto-1,2,4-triazole

To discover new 1,2,4-triazole derivatives which may possess significant biological activities, we synthesized a series of novel 6-aryl-3-(D-galactopentitol-1-yl)-7H-1,2,4-triazolo[3,4-b][1,3,4]thiadiazines and 4-(arylmethylidene)amino-5-(D-galactopentitol-1-yl)-3-mercapto-4H-1,2,4-triazoles from 4-amino-3-(D-galactopentitol-1-yl)-5-mercapto-1,2,4-triazole. All the title compounds were characterized by elemental analysis, IR, 1H- and 13C-NMR. Plant growth-regulating activity tests showed that these compounds have remarkable effects on the growth of radish and wheat.     

On the synthesis and reactivity of the Z-2,4-dinitrophenylhydrazone of 5-amino-3-benzoyl-1,2,4-oxadiazole

The synthesis of the title compound (4b) has been completed: its rearrangement (in dioxane/water; 1:1, v/v) into N-(2,4-dinitrophenyl)-5-phenyl-2H-1,2,3-triazol-4-ylurea (7) has been quantitatively studied in a wide reactivity (at 293 K, k(A) 10(-8) -4 s(-1)) and pS+ (4.5-14.1) range and compared with that of the Z-2,4-dinitrophenylhydrazone of 3-benzoyl-5-phenyl-1,2,4-oxadiazole (10), of the 3-(p-nitro)phenylureine of 5-phenyl-1,2,4-oxadiazole (13), and of N-(5-phenyl-1,2,4-oxadiazol-3-yl)-N'-p-nitrophenylformamidine (14). The results (reactivity, occurrence of specific or general base-catalysis, evidence for or absence of rate-limiting constants) have been well interpreted considering the structure of the side-chains involved and the stability of the final rings obtained in the rearrangements.     

2-{2-[3-(取代苯基)-3-氧代-2-1,2,4-三唑-1-基-丙基]-苯基}-2-甲氧亚氨基乙酸甲酯和乙酰甲胺类衍生物的合成与杀菌活性研究

以2-甲基苯甲酰甲酸甲酯为起始原料, 通过与甲氧基胺的盐酸盐、甲胺、N-溴代丁二酰亚胺(NBS)和1H-1,2,4-三氮唑钠反应合成了两个系列共计22个2-{2-[3-(取代苯基)-3-氧代-2-1,2,4-三唑-1-基-丙基]-苯基}-2-甲氧亚氨基乙酸甲酯和乙酰甲胺类的衍生物. 经IR, 1H NMR和MS对目标化合物进行了结构表征. 用浓度为 10 µg•mL－1的目标化合物进行了初步离体杀菌活性试验, 结果表明: Ha4, Ha5, Ha7对油菜菌核病有杀菌活性; Ha2, Hb8对小麦纹枯病有杀菌活性; Hb4对蔬菜灰霉病有杀菌活性; Hb4, Hb5对小麦赤霉病和小麦纹枯病均有杀菌活性.     

Reaction of arylidene derivatives of Meldrum's acid with 3-amino-1,2,4-triazole

The condensation of arylidene derivatives of Meldrum's acid with 3-amino-1,2,4-triazole in nitrobenzene leads to 4,5,6,7-tetrahydro-1,2,4-triazolo [1,5-a]pyrimidin-5-ones. In DMF the reaction proceeds with the formation of arylsubstituted N-(2H-1,2,4-triazol-3-yl)-3-(2H-1,2,4-triazol-3-ylamino)propionamides. Ukrainian Research Institute for the Pharmacotherapy of Endocrine Diseases, Kharkov 310002. Kharkov State University, Kharkov 310077, Ukraine