- Design and synthesis of sinomenine isoxazole derivatives via 1,3-dipolar cycloaddition reaction
-
A novel structure of sinomenine isoxazole derivatives is synthesised from sinomenine hydrochloride and aromatic aldehydes and requires six steps. 19 target compounds have been obtained in good yields. The sinomenine hydrochloride transforms to 4-alkynyl sinomenine, which is a key intermediate product to synthesise the target sinomenine isoxazole compounds, after a neutralisation reaction with ammonia and substitution reaction with 3-chloropropyne. Another key intermediate product is 1,3-dipole, which can be obtained from aromatic aldehyde. After treatment with hydroxylamine hydrochloride and then sodium carbonate solution, aromatic aldehyde is converted to aldehyde oxime, which reacts with N-chlorosuccinimide (NCS) to afford aryl hydroximino chloride. 1,3-Dipole is eventually formed in situ while triethylamine (TEA) in DMF is added dropwise. Then 4-alkynyl sinomenine is added to provide the sinomenine isoxazole derivative via 1,3-dipolar cycloaddition reaction as the key step. All the target compounds are characterised by melting point, 1H NMR, 13C NMR, HRMS and FT-IR spectroscopy.
- Pan, Hongmei,Lu, Tong,Wu, Xuedan,Gu, Chengwen,Tao, Naili,Zhang, Biao,Wang, Ao,Chen, Guangmei,Zhang, Kehua,Cheng, Jie,Jin, Jie
-
supporting information
p. 2360 - 2364
(2019/11/11)
-
- Design, synthesis, in vitro and in silico evaluation of new 3-phenyl-4,5-dihydroisoxazole-5-carboxamides active against drug-resistant mycobacterium tuberculosis
-
A new series of 3-phenyl-4,5-dihydroisoxazole-5-carboxamides were designed, synthesized, and evaluated for their potency against Mtb H37Rv. Designed molecules were synthesized by one-pot cycloaddition reaction in good to excellent yields. Anti-Tubercular evaluation of all synthesized derivatives identified 6k to be highly potent (MIC 1 μg/mL) against Mtb and drug-resistant strains. All potent derivatives were found to be non-toxic when tested against Vero cells. Also, in silico studies were employed to explore the binding patterns of designed compounds to target Mycobacterial membrane protein Large-3. All derivatives exhibited excellent binding patterns with the receptor. The excellent in silico Absorption, Distribution, Metabolism, and Excretion properties and druggability parameters positions these molecules as promising lead candidates for the future development of new drugs to treat drug-resistant Tuberculosis.
- Gaikwad, Nikhil Baliram,Afroz, Pathan,Ahmad, Mohammad Naiyaz,Kaul, Grace,Shukla, Manjulika,Nanduri, Srinivas,Dasgupta, Arunava,Chopra, Sidharth,Yaddanapudi, Venkata Madhavi
-
-
- Dibenzazepine-linked isoxazoles: New and potent class of α-glucosidase inhibitors
-
α-Glucosidase inhibition is a valid approach for controlling hyperglycemia in diabetes. In the current study, new molecules as a hybrid of isoxazole and dibenzazepine scaffolds were designed, based on their literature as antidiabetic agents. For this, a series of dibenzazepine-linked isoxazoles (33–54) was prepared using Nitrile oxide-Alkyne cycloaddition (NOAC) reaction, and evaluated for their α-glucosidase inhibitory activities to explore new hits for treatment of diabetes. Most of the compounds showed potent inhibitory potency against α-glucosidase (EC 3.2.1.20) enzyme (IC50 = 35.62 ± 1.48 to 333.30 ± 1.67 μM) using acarbose as a reference drug (IC50 = 875.75 ± 2.08 μM). Structure-activity relationship, kinetics and molecular docking studies of active isoxazoles were also determined to study enzyme-inhibitor interactions. Compounds 33, 40, 41, 46, 48–50, and 54 showed binding interactions with critical amino acid residues of α-glucosidase enzyme, such as Lys156, Ser157, Asp242, and Gln353.
- Umm-E-Farwa,Ullah, Saeed,Khan, Maria Aqeel,Zafar, Humaira,Atia-tul-Wahab,Younus, Munisaa,Choudhary, M. Iqbal,Basha, Fatima Z.
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supporting information
(2021/05/10)
-
- 1,3-Dipolar Cycloaddition, HPLC Enantioseparation, and Docking Studies of Saccharin/Isoxazole and Saccharin/Isoxazoline Derivatives as Selective Carbonic Anhydrase IX and XII Inhibitors
-
Two series of saccharin/isoxazole and saccharin/isoxazoline hybrids were synthesized by 1,3-dipolar cycloaddition. The new compounds showed to be endowed with potent and selective inhibitory activity against the cancer-related human carbonic anhydrase (hCA) IX and XII isoforms in the nanomolar range, while no affinity was encountered for off-targets, such as hCA I and II. Successive enantioseparation on a milligram scale of the most representative compounds led to the discovery that (S)-isomers were more potent than their corresponding (R)-enantiomers. Lastly, molecular modeling studies were conducted to define those structural requirements that were responsible for the discrimination among selected human isoforms of carbonic anhydrases. Two nanomolar hCA IX and XII inhibitors were also screened for their selective toxicity against non tumoral primary cells (fibroblasts) and against a breast adenocarcinoma cell line (MCF7) in hypoxic environment. The efficacious combination of these compounds with doxorubicin on MCF7 cells was demonstrated after 72 h of treatment.
- D'Ascenzio, Melissa,Secci, Daniela,Carradori, Simone,Zara, Susi,Guglielmi, Paolo,Cirilli, Roberto,Pierini, Marco,Poli, Giulio,Tuccinardi, Tiziano,Angeli, Andrea,Supuran, Claudiu T.
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p. 2470 - 2488
(2020/03/31)
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- Nitro-, cyano-, and methylfuroxans, and their bis-derivatives: From green primary to melt-cast explosives
-
In the present work, we studied in detail the thermochemistry, thermal stability, mechanical sensitivity, and detonation performance for 20 nitro-, cyano-, and methyl derivatives of 1,2,5-oxadiazole-2-oxide (furoxan), along with their bis-derivatives. For all species studied, we also determined the reliable values of the gas-phase formation enthalpies using highly accurate multilevel procedures W2-F12 and/or W1-F12 in conjunction with the atomization energy approach and isodesmic reactions with the domain-based local pair natural orbital (DLPNO) modifications of the coupled-cluster techniques. Apart from this, we proposed reliable benchmark values of the formation enthalpies of furoxan and a number of its (azo)bis-derivatives. Additionally, we reported the previously unknown crystal structure of 3-cyano-4-nitrofuroxan. Among the monocyclic compounds, 3-nitro-4-cyclopropyl and dicyano derivatives of furoxan outperformed trinitrotoluene, a benchmark melt-cast explosive, exhibited decent thermal stability (decomposition temperature >200 ?C) and insensitivity to mechanical stimuli while having notable volatility and low melting points. In turn, 4,40-azobis-dicarbamoyl furoxan is proposed as a substitute of pentaerythritol tetranitrate, a benchmark brisant high explosive. Finally, the application prospects of 3,30-azobis-dinitro furoxan, one of the most powerful energetic materials synthesized up to date, are limited due to the tremendously high mechanical sensitivity of this compound. Overall, the investigated derivatives of furoxan comprise multipurpose green energetic materials, including primary, secondary, melt-cast, low-sensitive explosives, and an energetic liquid.
- Larin, Alexander A.,Bystrov, Dmitry M.,Fershtat, Leonid L.,Konnov, Alexey A.,Makhova, Nina N.,Monogarov, Konstantin A.,Meerov, Dmitry B.,Melnikov, Igor N.,Pivkina, Alla N.,Kiselev, Vitaly G.,Muravyev, Nikita V.
-
-
- Diversity Oriented Clicking (DOC): Divergent Synthesis of SuFExable Pharmacophores from 2-Substituted-Alkynyl-1-Sulfonyl Fluoride (SASF) Hubs
-
Diversity Oriented Clicking (DOC) is a unified click-approach for the modular synthesis of lead-like structures through application of the wide family of click transformations. DOC evolved from the concept of achieving “diversity with ease”, by combining classic C?C π-bond click chemistry with recent developments in connective SuFEx-technologies. We showcase 2-Substituted-Alkynyl-1-Sulfonyl Fluorides (SASFs) as a new class of connective hub in concert with a diverse selection of click-cycloaddition processes. Through the selective DOC of SASFs with a range of dipoles and cyclic dienes, we report a diverse click-library of 173 unique functional molecules in minimal synthetic steps. The SuFExable library comprises 10 discrete heterocyclic core structures derived from 1,3- and 1,5-dipoles; while reaction with cyclic dienes yields several three-dimensional bicyclic Diels–Alder adducts. Growing the library to 278 discrete compounds through late-stage modification was made possible through SuFEx click derivatization of the pendant sulfonyl fluoride group in 96 well-plates—demonstrating the versatility of the DOC approach for the rapid synthesis of diverse functional structures. Screening for function against MRSA (USA300) revealed several lead hits with improved activity over methicillin.
- Barrow, Andrew S.,Cheng, Yunfei,Gialelis, Timothy L.,Giel, Marie-Claire,Kitamura, Seiya,Li, Gencheng,Moses, John E.,Ottonello, Alessandra,Sharpless, K. Barry,Smedley, Christopher J.,Wolan, Dennis W.
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supporting information
p. 12460 - 12469
(2020/06/10)
-
- Discovery of Natural Product-Based Fungicides (II): Semisynthesis and Biological Activity of Sarisan Attached 3-Phenylisoxazolines as Antifungal Agents
-
Many phytopathogenic fungi cause severe damage to crop yields. In continuation of our research aimed at the discovery and development of natural products-based fungicides, a series of thirty-one sarisan attached 3-phenylisoxazolines were synthesized and evaluated for their antifungal activities against five phytopathogenic fungi (B. cinerea, C. lagenarium, A. solani, F. solani, and F. graminearum). Among all title sarisan derivatives, compounds IV2, IV14 and IV23 showed potent antifungal activity against some phytopathogenic fungi. In particular, compound IV2 exhibited a broad-spectrum and more potent antifungal activity against A. solani, F. solani, and F. graminearum than the commercial fungicide Hymexazol. In addition, compounds IV2, IV14 and IV23 also displayed relative low toxicity on normal NRK-52E cells. This work will give some insights into the development of sarisan derivatives as new fungicide candidates in plant protection.
- Liu, Zhiyan,Cao, Jiangping,Yan, Xiaoting,Cheng, Wanqing,Wang, Xiaoguang,Yang, Ruige,Guo, Yong
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-
- Synthesis method of parecoxib sodium isomeric impurities
-
The invention provides a synthesis method of parecoxib sodium isomeric impurities. Structures of the parecoxib sodium isomeric impurities are shown in formulae I and II in the description. The synthesis method comprises the following steps: the compound as shown in the formula I is subjected to reaction with the compound as shown in formula II or the compound as shown in formula III under the action of alkali, and a compound as shown in formula IV is generated; the corresponding parecoxib sodium isomeric impurities are generated by reduction reaction, diazotization, sulfonylation, amino substitution reaction and acylation reaction; the total reaction yield is higher than 22%, and purity of a target product is higher than 99%.
- -
-
Paragraph 0153; 0161-0167
(2019/01/23)
-
- Substituent effect study on the experimental 13C NMR chemical shifts of 3-(substituted phenyl)-3a,4,8,8a-tetrahydro-1,3-dioxepino[5,6-d] [1,2] isoxazoles
-
Novel heterocyclic derivatives containing isoxazole ring were synthesized by the 1,3-dipolar cycloaddition reaction of substituted nitrile oxides with cis-4,7-dihydro-1,3-dioxepin in the present study. These 3-(substituted phenyl)-3a,4,8,8a-tetrahydro-1,3
- Kara, Yesim S.,Yalduz, Sümeyye
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p. 158 - 165
(2019/05/22)
-
- Discovery of a Furanopyrimidine-Based Epidermal Growth Factor Receptor Inhibitor (DBPR112) as a Clinical Candidate for the Treatment of Non-Small Cell Lung Cancer
-
Epidermal growth factor receptor (EGFR)-targeted therapy in non-small cell lung cancer represents a breakthrough in the field of precision medicine. Previously, we have identified a lead compound, furanopyrimidine 2, which contains a (S)-2-phenylglycinol
- Lin, Shu-Yu,Chang Hsu, Yung,Peng, Yi-Hui,Ke, Yi-Yu,Lin, Wen-Hsing,Sun, Hsu-Yi,Shiao, Hui-Yi,Kuo, Fu-Ming,Chen, Pei-Yi,Lien, Tzu-Wen,Chen, Chun-Hwa,Chu, Chang-Ying,Wang, Sing-Yi,Yeh, Kai-Chia,Chen, Ching-Ping,Hsu, Tsu-An,Wu, Su-Ying,Yeh, Teng-Kuang,Chen, Chiung-Tong,Hsieh, Hsing-Pang
-
supporting information
p. 10108 - 10123
(2019/11/29)
-
- INDAZOLYL-L,2,4-THIADIAZOLAMINES AND RELATED COMPOUNDS FOR INHIBITION OF RHO-ASSOCIATED PROTEIN KINASE AND THE TREATMENT OF DISEASE
-
The invention provides indazolyl thiadiazolamines and related compounds, pharmaceutical compositions, methods of inhibiting Rho-associated protein kinase, and methods of treating inflammatory disorders, immune disorders, fibrotic disorders, and other medical disorders using such compounds. An exemplary indazolyl thiadiazolamine compound is an N-(3-(5-((1 H-indazol-5-yl)amino)- 1,2,4-thiadiazol-3-yl )phenyl )-heteroaryl-carboxamide compound.
- -
-
Paragraph 00177
(2018/03/25)
-
- Tandem Condensation/Rearrangement Reaction of 2-Aminohetarene N-Oxides for the Synthesis of Hetaryl Carbamates
-
A new approach to hetaryl carbamates through a tandem condensation/rearrangement reaction of 2-aminohetarene N-oxides was developed. The developed reaction is suitable for both five- and six-membered heterocycles and proceeds through the condensation of 2
- Bystrov, Dmitry M.,Zhilin, Egor S.,Fershtat, Leonid L.,Romanova, Anna A.,Ananyev, Ivan V.,Makhova, Nina N.
-
supporting information
p. 3157 - 3163
(2018/08/24)
-
- Preparation technology for 3-aryl-4-nitro isoxazole compound
-
The invention discloses a preparation technology for a 3-aryl-4-nitro isoxazole compound. The preparation technology comprises the following steps: synthesizing a compound shown as formula II through the nucleophilic addition of hydroxylamine hydrochloride and the compound shown as formula I used as the raw material; acquiring the compound shown as formula III through the substitution reaction of the compound shown as formula II and N-chlorosuccinimide; preparing 1-dimethyl amino-2-nitro ethylene through the reaction of N,N-dimethylformamide dimethyl acetal and nitromethane used as the raw material; and acquiring a target product 3-aryl-4-nitro isoxazole compound through the cyclization reaction of the compound shown as formula III and 1-dimethyl amino-2-nitro ethylene. The raw materials in the synthesis route are low in cost and easily acquired, the operation condition is mild and is easily controlled, the product is easily purified and the preparation technology is a new method for synthesizing the 3-aryl-4-nitro isoxazole compound.
- -
-
Paragraph 0135; 0136
(2018/03/01)
-
- Synthesis, characterization, antimicrobial activity, and QSAR studies on substituted oxadiazaboroles
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This paper presents the synthesis and in vitro antimicrobial activity studies of 3,4,5-trisubstituted 4,5-dihydro-1,2,4,5-oxadiazaboroles (4) and 3,5-disubstituted 4,5-dihydro-1,2,4,5-oxadiazaboroles (7). The antimicrobial activities of the compounds were
- Pir, Meryem,Agirbas, Hikmet,Budak, Fatma,Ilter, Merve
-
p. 1794 - 1812
(2016/10/03)
-
- Side-chain prototropic tautomerism of 4-hydroxyfuroxans in methylation reactions
-
A general and simple method for the preparation of under explored 3-aryl-4-hydroxyfuroxans by nucleophilic substitution of the nitro group in 3-aryl-4-nitrofuroxans using NaOH in H2O-THF has been developed. The methylation of 3-aryl-4-hydroxyfu
- Fershtat, Leonid L.,Epishina, Margarita A.,Ovchinnikov, Igor V.,Struchkova, Marina I.,Romanova, Anna A.,Ananyev, Ivan V.,Makhova, Nina N.
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supporting information
p. 5685 - 5689
(2016/11/28)
-
- Substituent effect study on experimental 13C NMR chemical shifts of (3-(substituted phenyl)-cis-4,5-dihydroisoxazole-4,5-diyl)bis(methylene)diacetate derivatives
-
Abstract Eleven novel (3-(substituted phenyl)-cis-4,5-dihydroisoxazole-4,5-diyl)bis(methylene) diacetate derivatives were synthesized in the present study. These dihydroisoxazole derivatives were characterized by IR, 1H NMR, 13C NMR
- Kara, Yesim S.
-
p. 723 - 730
(2015/07/28)
-
- Efficient synthesis of bis-isoxazole ethers via 1,3-dipolar cycloaddition catalysed by Zn/Zn2+ and their antifungal activities
-
An efficient method was developed for synthesising isoxazoles. A series of novel bis-isoxazole ether compounds VI, VII and VIII were synthesised starting from different substituted aldehydes (I) via a 1,3-dispolar cycloaddition using Zn/Zn2+ as a catalyst; these were characterised by FT-IR, HRMS, 1H NMR and 13C NMR spectroscopy. In addition, the antimicrobial properties of the synthesised products were investigated. The synthesised compounds exhibited significant antifungal activities in comparison with the standard drugs, fluconazole and itraconazole. It was found that Candida albicans was sensitive to 2-substituted phenyl bis-isoxazole ethers bearing pyridyl.
- Zhang, Da-Wei,Lin, Feng,Li, Bo-Chao,Liu, Hong-Wei,Zhao, Tian-Qi,Zhang, Yu-Min,Gu, Qiang
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p. 1500 - 1511
(2015/09/15)
-
- PEST CONTROL COMPOSITION
-
A pest control composition comprising a hydrazide compound shown by formula (1) below (in the formula, G, M, Q1, Q2, Q3, Q4, R2, R4, R5, R6 and m have the same meanings described in the specification) and etofenprox and a method for controlling pests whereby an effective dose of the hydrazide compound represented by formula (1) and etofenprox is applied to a pest or a pest habitat.
- -
-
Paragraph 0732; 0733; 0734
(2013/06/04)
-
- PEST CONTROL COMPOSITION
-
A pest control composition comprising a hydrazide compound shown by formula (1) below (in the formula, G, M, Q1, Q2, Q3, Q4, R2, R4, R5, R6 and m have the same meanings described in the specification) and dinotefuran, and a method for controlling pests whereby an effective dose of the hydrazide compound represented by formula (1) and dinotefuran is applied to a pest or a pest habitat.
- -
-
Paragraph 0799; 0800; 0801
(2013/06/04)
-
- PEST CONTROL COMPOSITION
-
A pest control composition comprising a hydrazide compound shown by formula (1) below (in the formula, G, M, Q1, Q2, Q3, Q4, R2, R4, R5, R6 and m have the same meanings described in the specification) and an ester compound shown by formula (2) below (in the formula, X10, X20, X30 and X40 have the same meanings described in the specification) and a method for controlling pests whereby an effective dose of the hydrazide compound represented by formula (1) and the ester compound represented by formula (II) is applied to a pest or a pest habitat.
- -
-
Paragraph 0962; 0963; 0964
(2013/06/04)
-
- PEST CONTROL COMPOSITION
-
A pest control composition comprising a hydrazide compound shown by formula (1) below (in the formula, G, M, Q1, Q2, Q3, Q4, R2, R4, R5, R6 and m have the same meanings described in the specification) and an ester compound shown by formula (2) below (in the formula, X10, X20 and X30 have the same meanings described in the specification) and a method for controlling pests whereby an effective dose of the hydrazide compound represented by formula (1) and the ester compound represented by formula (II) is applied to a pest or a pest habitat.
- -
-
Paragraph 1044; 1045; 1046
(2013/06/04)
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- Facile synthesis of 3-aryl-5-(2-oxopyrrolidin-1-yl)-and 5-(pyridin-4-yl)-4,5-dihydroisoxazoles via 1,3-dipolar cycloaddition under mild conditions
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A convenient and efficient synthetic approach for the synthesis of 5-substituted 3-aryl-4,5-dihydroisoxazoles is reported. In the presence of triethylamine, a series of hydroximoyl chlorides were transformed into nitrile oxides, followed by reaction with N-vinyl-2-pyrrolidinone (or 4-vinylpyridine) by a 1,3-dipolar cycloaddition to give novel 4,5-dihydroisoxazole derivatives.
- Gong, Yan,Wang, Yong,Zhao, Wen-Tao,Tang, Xiang-Yang
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p. 499 - 502
(2013/09/12)
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- AZOLINE COMPOUNDS FOR COMBATING INVERTEBRATE PESTS
-
The present invention relates to azoline compounds which are useful for combating or controlling invertebrate pests, in particular arthropod pests and nematodes. The invention also relates to a method for controlling invertebrate pests by using these comp
- -
-
Page/Page column 249-250
(2011/07/07)
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- One-pot synthesis of (3-phenylisoxazol-5-yl) methanol derivatives under ultrasound
-
An ultrasonic-assisted, one-pot, efficient, convenient procedure for the synthesis of (3-phenylisoxazol-5-yl)methanol derivatives has been developed. (3-Phenylisoxazol-5-yl)-methanol derivatives with biological and pharmaceutical property have been synthe
- Shen, Chuansheng,Zhang, Yumin,Gan, Yuanming,Zhao, Tianqi,Gu, Qiang
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experimental part
p. 278 - 281
(2012/04/18)
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- HYDRAZIDE COMPOUND AND USE OF THE SAME IN PEST CONTROL
-
There is provided a hydrazide compound having a controlling effect on pests represented by the formula (1): wherein, G is a 5-membered heterocyclic group, M is an oxygen atom or a sulfur atom, Q1, Q2, Q3 and Q4 is independently a nitrogen atom, etc., m is an integer of 0 to 5, R2 is an optionally halogenated C1-C6 alkyl group, etc., R5 and R6 are independently an optionally substituted C1-C12 chain hydrocarbon group, etc., and R4 is an optionally substituted C1-C12 chain hydrocarbon group, etc.
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Page/Page column 130-131
(2010/08/18)
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- NOVEL SULFAMOYL-PHENYL-UREIDO COMPOUNDS AND THEIR USE AS MEDICAMENT
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The present invention relates to novel sulfamoyl-phenyl-ureido compounds having the formula (I) or a physiologically acceptable salt or derivative thereof which are suitable for the therapy of infections caused by protozoa and in particular uncomplicated
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-
Page/Page column 12-13
(2010/08/08)
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- An alkynyliodide cycloaddition strategy for the construction of iodoisoxazoles
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(Figure presented) The thermally promoted cycloaddition between alkynyliodides and nitrile oxides is reported. The process offers excellent regioselectivity and a broad scope with respect to both the iodoalkynes and chloro-oximes. Further functionalization of the highly decorated iodoisoxazole motifs can be achieved via Suzuki cross-coupling.
- Crossley, James A.,Browne, Duncan L.
-
supporting information; scheme or table
p. 5414 - 5416
(2010/10/04)
-
- Parallel synthesis of bis-heterocyclic isoxazolylmethyl- And isoxazolinylmethylpyrazoles
-
The solution-phase parallel synthesis of a 136-member library of isoxazol(in)e-CH2-pyrazoles is described, X-ray crystallographic structure determination verified the regioselectivities of the N-alkylation and nitrile oxide 1,3-dipolar cycloadd
- Meng, Liping,Lorsbach, Beth A.,Sparks, Thomas C.,Fettinger, James C.,Kurth, Mark J.
-
body text
p. 129 - 136
(2010/10/19)
-
- Diastereoselective cycloadditions of a soluble polymer-supported substituted allyl alcohol derived from Baylis-Hillman reaction with nitrile oxides
-
A diastereoselective cycloaddition of a soluble polymer-supported Baylis-Hillman adduct with nitrile oxides is described. The reaction has shown to proceed with moderate diastereoselectivity, favoring the syn isomer of the resulting 3,5-substituted isoxazolines. The stereochemistry of the products has been assigned using 1H NMR studies. The structure of one of the diastereomers has been determined by single-crystal X-ray crystallographic analysis.
- Shang, Yongjia,Feng, Zhijun,Yuan, Lili,Wang, Shaowu
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p. 5779 - 5783
(2008/09/21)
-
- Biologically active hydroxymoyl chlorides as antifungal agents
-
Several oximes and oxime ethers have been developed as antimicrobial agents. A series of chlorooximes (hydroximoyl chlorides) have been synthesized and tested for antifungal activity under in-vitro conditions against Candida albicans, Candida parapsilosis, Candida glabrata, Candida krusei, Aspergillus fumigatus, Aspergilhis flaviis and Aspergillus niger. The derived antifungal activity has been compared with the corresponding oximes. The results show that most of the chlorooximes exhibit potent antifungal activity with anti-isomers showing better activity. It is observed that most of the chlorooximes show interesting antifungal activity (MICs ≤ 32 μg/mL) compared to oximes. Compound 3q (2,3-dimethoxy phenyl hydroxymoyl chloride) is the most active compound. This compound is active against all the Candida species (MIC 0.5 μg/mL) as well as filamentous fungi with MIC range of 2-4 μg/mL. This series of compounds are fungicidal in nature as evident from the MFC results.
- Ismail, Tabasum,Shafi, Syed,Singh, Parvinder Pal,Qazi, Naveed Ahmed,Sawant, Sanghapal D.,Ali, Intzar,Khan, Inshad Ali,Kumar,Qazi, Ghulam Nabi,Alam, M. Sarwar
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p. 740 - 747
(2008/12/20)
-
- ISOXAZOLINE COMPOUNDS AND THEIR USE IN PEST CONTROL
-
An isoxazoline compound represented by the formula (I): wherein the substituents are as defined in the description, has a controlling activity against pests.
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Page/Page column 186-187
(2008/12/08)
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- The synthesis of benzhydroximoyl chloride and nitrile oxides under solvent free conditions
-
Benzhydroximoyl chlorides were prepared as nitrile oxide precursors with acidic (HCl) silica gel/Oxone in solvent less media in excellent yields with the selective chlorination of aldoximes vs. aromatic substitution. Nitrile oxides were generated by Huisg
- Bigdeli, Mohammad A.,Mahdavinia, Gholam Hossein,Jafari, Saeed
-
-
- Oxadiazoline ligands for modulating the expression of exogenous genes via an ecdysone receptor complex
-
The present invention relates to non-steroidal ligands for use in nuclear receptor-based inducible gene expression system, and a method to modulate exogenous gene expression in which an ecdysone receptor complex comprising: a DNA binding domain; a ligand binding domain; a transactivation domain; and a ligand is contacted with a DNA construct comprising: the exogenous gene and a response element; wherein the exogenous gene is under the control of the response element and binding of the DNA binding domain to the response element in the presence of the ligand results in activation or suppression of the gene.
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Page/Page column 30
(2008/06/13)
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- SUBSTITUTED DIPHENYL ISOXAZOLES, PYRAZOLES AND OXADIAZOLES USEFUL FOR TREATING HCV INFECTION
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The present invention relates to substituted diphenyl heterocycle compounds and pharmaceutical compositions thereof that inhibit replication of HCV virus. The present invention also relates to the use of the compounds and/or compositions to inhibit HCV replication and/or proliferation and to treat or prevent HCV infections.
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Page 44; 10/22
(2010/02/09)
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- Regioselective synthesis and side-chain metallation and elaboration of 3-aryl-5-alkylisoxazoles
-
A number of 3-aryl-5-alkylisoxazoles have been synthesized in high yields by reacting arylnitrile oxides with free enolate ions regioselectively obtained by metallation of various alkyl methyl ketones with LDA in THF at -78°C followed by dehydration. Inve
- Di Nunno, Leonardo,Scilimati, Antonio,Vitale, Paola
-
p. 2659 - 2665
(2007/10/03)
-
- Synthesis of isoxazolines and isoxazoles using poly(ethylene glycol) as support
-
A general method for the liquid-phase syntheses of isoxazoles and isoxazolines through a 1,3-dipolar cycloaddition is described. The poly(ethylene glycol) (PEG)-supported alkyne 2 or alkene 6 reacted with nitrile oxides generated in situ from aldoximes 3, followed by cleavage from the PEG, to give isoxazoles or isoxazolines in good yield and purity.
- Shang, Yong-Jia,Wang, Yan-Guang
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p. 1663 - 1668
(2007/10/03)
-
- Synthesis and reactivity of carbohydroximoyl azides: I. Aliphatic and aromatic carbohydroximoyl azides and 5-substituted 1-hydroxytetrazoles based thereon
-
Chlorination of 1-hydroxyiminopentane gave 1-chloro-1-nitrosopentane which reacted with sodium azide in DMF to form pentanohydroximoyl azide. The azidation of benzohydroximoyl chlorides was always accompanied by decomposition to benzonitriles. Treatment of carbohydroximoyl azides in ether with gaseous hydrogen chloride afforded 5-butyl-and 5-aryl-1-hydroxytetrazoles which reacted with acetic anhydride to form the corresponding acetates.
- Tselinskii,Mel'nikova,Romanova
-
p. 430 - 436
(2007/10/03)
-
- Unusual Regioselectivity of the Dipolar Cycloaddition Reactions of Nitrile Oxides and Tertiary Cinnamides and Crotonamides
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Benzonitrile oxides undergo 1,3-dipolar cycloaddition reactions with methyl cinnamate to produce the 5-phenyl and 4-phenyl regioisomers in approximately an 80:20 ratio. However, use of N,N-diethylcinnamide as the dipolarophile unexpectedly resulted in the formation of the 5-phenyl and 4-phenyl regioisomers in a 23:77 ratio. Studies have shown that this phenomena occurs only for tertiary cinnamides. In addition, it has been demonstrated that the phenyl group of tertiary cinnamides is not essential for the reversal of regioselectivity since crotonamides produce the same results and trends as the cinnamides. However, since acrylates and acrylamides both produce the 5-carbonyl regioisomers, it can be concluded that the β-substituent is playing a key role for the unexpected results by possibly increasing steric interactions between the dipole and dipolarophile in the transition state. Transition state energies were calculated for the regioisomeric cycloadduct pairs derived from several crotonamides as well as methyl crotonate. These calculations indicate that steric factors are indeed responsible for the reversal of regioselectivity.
- Weidner-Wells, Michele A.,Fraga-Spano, Stephanie A.,Turchi, Ignatius J.
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p. 6319 - 6328
(2007/10/03)
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- Regioselectivity in the 1,3-Dipolar Cycloaddition of Nitrile Oxides to N-(3,5-Dichlorophenyl)itaconimide
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The regioselectivity of the nitrile oxide cycloaddition with 3,3-methylene-1-(3,5-dichlorophenyl)-2,5-pyrrolidindione (1) is discussed.Arylnitrile oxides add regioselectively to the carbon-carbon double bond of 1, giving exclusively spiro-isoxazolines 3a-
- Fisera, L.,Konopikova, M.,Ertl, P.,Pronayova, N.
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p. 301 - 312
(2007/10/02)
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- Selective Acylations of 3(5)-Alkyl-5(3)-amino-1H-pyrazoles and a New Pyrazolo-1,2,4-triazole Synthesis
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(Z)-5-Amino-1--1H-pyrazoles 3 have been synthesized by acylation of 3(5)-alkyl-5(3)-amino-1H-pyrazoles 1 with nitrile oxides.The tosylation of the hydroxyimino group of 3 to (Z)-5-amino-1--1H-pyrazoles 4 and the subsequent acetylation of the 5-amino group give (E)- and (Z)-5-acetamido-1--1H-pyrazoles 5, which undergo cyclization under basic conditions to pyrazolo-1,2,4-triazoles 6, 7 or 8. - Key Words: Pyrazoles / Pyrazolo-1,2,4-triazoles
- Kirschke, Klaus,Wolff, Erich,Ramm, Matthias,Lutze, Gerhard,Schulz, Burkhard
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p. 1037 - 1042
(2007/10/02)
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- A new method for the synthesis of nitriles enriched with the 15N isotope
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A new synthetic method for the preparation of 15N-labeled nitriles from nonlabeled nitriles is proposed. - Key words: 15N isotope; nitriles; amidoximes.
- Yarovebko, V. N.,Krayushkin, M. M.,Lysenko, O. V.,Kustov, L. M.,Zavarzin, I. V.
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p. 402 - 404
(2007/10/02)
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- Phosphotriesters Approach to the Synthesis of Oligonucleotides: A Reappraisal
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The phosphotriester approach to the synthesis of oligodeoxyribo- and oligoribo-nucleotides in solution has been reinvestigated.The efficacy of mesitylene-2-sulfonyl chloride (MSCl) 15a, 2,4,6-triisopropylbenzenesulfonyl chloride (TrisCl) 15b, 4-bromobenzenesulfonyl chloride 15c, naphthalene-1-sulfonyl chloride 39, and 2- and 4-nitrobenzenesulfonyl chlorides 40a and 40b, respectively, as activating agents has been examined.The latter arenesulfonyl chlorides have been used in conjunction with the following nucleophilic catalysts: 1-methylimidazole, 3-nitro-1H-1,2,4-triazole 19, 5-(3-nitrophenyl)-1H-tetrazole 20a, 5-(3,5-dinitrophenyl)-1H-tetrazole 20b, 5-(1-methylimidazol-2-yl)-1H-tetrazole 21, 5--1H-tetrazole 22, 4-ethoxypyridine 1-oxide 14a, 4,6-dinitro-1-hydroxybenzotriazole 29a, 1-hydroxy-4-nitro-6-(trifluoromethyl)benzotriazole 29b, 1-hydroxy-5-phenyltetrazole 30a and 1-hydroxy-5-(3-nitrophenyl)tetrazole 30b.The rates of formation and yields of the fully protected dideoxyribonucleoside and diribonucleoside phosphates 37 and 47, respectively, were determined using various combinations of activating agents and nucleophilic catalysts.Although 2- and 4-nitrobenzenesulfonyl chlorides 40a and 40b, respectively, proved to be the most powerful activating agents, their use in the deoxy-series led to the formation of by-products and hence to unsatisfactory isolated yields of the dideoxyribonucleoside phosphate 37.
- Reese, Colin B.,Pei-Zhuo, Zhang
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p. 2291 - 2302
(2007/10/02)
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- An improved synthesis of isoxazolines based on Tprssell's procedure
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Isoxazolines (1-29) have been prepared in 65-75percent yield by cycloaddition of alkenes to benzonitrile oxide, 4-chlorobenzonitrile oxide and 3-nitrobenzonitrile oxide generated in situ from the respective araldoximes.A number of new isoxazolines such as
- Nagarajan, A.,Pillay, M. Krishna
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p. 471 - 474
(2007/10/02)
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- The 1,3-dipolar cycloadditions of nitrile oxides and nitrile imines to alkyl dicyanoacetates
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The readily available alkyl dicyanoacetates 1 reacted with the 1,3-dipolar reagents arenecarbonitrile oxides 2′ and arenecarbonitrile imines 5′ to afford 1,2,4-oxadiazol and 1,2,4-triazol derivatives. The arenecarbonitrile oxides 2′ with electron-donating
- Neidlein, Richard,Sui, Zhihua
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p. 501 - 507
(2007/10/02)
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- Regioselective synthesis of C-nucleosides by 1,3-dipolar cycloaddition of arylnitrile oxides to 5,6-dideoxy-1,2-O-isopropylidene-α-D-xylo-hex-5-enofuranose
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The synthesis of 3-aryl-5-(1,2-O-isopropylidene-α-D-xylo-tetrofuranos-4-yl)-2-isoxazoline (3) from arylnitrile oxides and 5,6-dideoxy-1,2-O-isopropylidene-α-D-xylo-hex-5-enofuranose (1) is described.The 1,3-dipolar cycloaddition reactions give mainly anti-adducts (>=95percent ?-facial stereoselectivity).
- Al-Timari, Usama A. R.,Fisera, Lubor
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p. 121 - 127
(2007/10/02)
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- Heterocycles from Nitrile Oxides. I. 5-Imino-Δ2-1,4,2-Oxathiazolines
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The reaction of some arylnitrile oxides with potassium thiocyanate in acetone at ambient temperature, has been investigated.Those having para- or meta-halo (or nitro) substituents give 3-aryl-5-imino-Δ2-1,4,2-oxathiazolines as stable cycloadducts. ortho-Substitution, on the other hand, led directly to the corresponding 5-(carbamido)imino analogues.The structures of these new heterocycles are supported by elemental analyses and spectral data.
- Hussein, Ahmed Q.,El-Abadelah, Mustafa M.,Sabri, Wail S.
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p. 301 - 304
(2007/10/02)
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