- Quantitative helix handedness bias through a single Hvs.CH3stereochemical differentiation
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A novel chiral aromatic δ-amino acid building block was shown to fully induce handedness in quinoline oligoamide foldamers with the possibility of further increasing the bias by combining multiples of these units in the same sequence. Through its incorporation within the helix, both N- and C-termini are still accessible for further functionalisation.
- Bindl, Daniel,Heinemann, Elisabeth,Mandal, Pradeep K.,Huc, Ivan
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- Design, synthesis and biological evaluation of oxime lacking Psammaplin inspired chemical libraries as anti-cancer agents
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In this study, we attempted the chemical simplification of Psammaplin (PsA), while retaining its activity in vitro. Inspired by the previous Structure Activity Relationship (SAR) studies on various PsA analogues and relying on the fact that oxime is metabolically unstable, we initially designed and synthesized a diverse library of PsA analogues and evaluated for cytotoxic activity. Among 32 compounds of Psammaplin analogues synthesized, the compound 10b was almost equally active as parent Psammaplin in vitro.
- Ali, Kasim,Chaturvedi, Priyank,Datta, Dipak,Kumar M, Srinivas Lavanya,Meena, Sanjeev,Panda, Gautam
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- Synthesis and herbicidal activities of aryloxyacetic acid derivatives as HPPD inhibitors
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A series of aryloxyacetic acid derivatives were designed and synthesized as 4-hydoxyphenylpyruvate dioxygenase (HPPD) inhibitors. Preliminary bioassay results reveal that these derivatives are promising Arabidopsis thaliana HPPD (AtHPPD) inhibitors, in particular compounds I12 (Ki = 0.011 μM) and I23 (Ki = 0.012 μM), which exhibit similar activities to that of mesotrione, a commercial HPPD herbicide (Ki = 0.013 μM). Furthermore, the newly synthesized compounds show significant greenhouse herbicidal activities against tested weeds at dosages of 150 g ai/ha. In particular, II4 exhibited high herbicidal activity for pre-emergence treatment that was slightly better than that of mesotrione. In addition, compound II4 was safe for weed control in maize fields at a rate of 150 g ai/ha, and was identified as the most potent candidate for a novel HPPD inhibitor herbicide. The compounds described herein may provide useful guidance for the design of new HPPD inhibiting herbicides and their modification.
- Huang, Hao,Liu, Jian-Min,Shu, Lei,Wang, Man-Man,Yan, Yi-Le,Zhang, Da-Yong,Zhang, Jian-Qiu
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p. 233 - 247
(2020/03/27)
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- An Efficient One-Pot Synthesis of 2-(Aryloxyacetyl)cyclohexane-1,3-diones as Herbicidal 4-Hydroxyphenylpyruvate Dioxygenase Inhibitors
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4-Hydroxyphenylpyruvate dioxygenase (EC 1.13.11.27, HPPD) is an important target for new bleaching herbicides discovery. As a continuous work to discover novel crop selective HPPD inhibitor, a series of 2-(aryloxyacetyl)cyclohexane-1,3-diones were rationally designed and synthesized by an efficient one-pot procedure using N,N′-carbonyldiimidazole (CDI), triethylamine, and acetone cyanohydrin in CH2Cl2. A total of 58 triketone compounds were synthesized in good to excellent yields. Some of the triketones displayed potent in vitro Arabidopsis thaliana HPPD (AtHPPD) inhibitory activity. 2-(2-((1-Bromonaphthalen-2-yl)oxy)acetyl)-3-hydroxycyclohex-2-en-1-one, II-13, displayed high, broad-spectrum, and postemergent herbicidal activity at the dosage of 37.5-150 g ai/ha, nearly as potent as mesotrione against some weeds. Furthermore, II-13 showed good crop safety against maize and canola at the rate of 150 g ai/ha, indicating that II-13 might have potential as a herbicide for weed control in maize and canola fields. II-13 is the first HPPD inhibitor showing good crop safety toward canola.
- Wang, Da-Wei,Lin, Hong-Yan,He, Bo,Wu, Feng-Xu,Chen, Tao,Chen, Qiong,Yang, Wen-Chao,Yang, Guang-Fu
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p. 8986 - 8993
(2016/12/09)
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- Identification of the novel N-phenylbenzenesulfonamide derivatives as potent HIV inhibitors
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Searching for more safe and effective agents for HIV treatments is still an urgent topic worldwide. Based on our continuous modifications on the benzophenone derivatives as HIV-1 reverse transcriptase (RT) inhibitors, a new template bearing N-phenylbenzenesulfonamide (PBSA) structure was designed to enhance the interactions with HIV-1 RT. In this manuscript, a series of PBSA derivatives were synthesized and evaluated for their anti-HIV-1 activity. The preliminary test showed that these compounds were potent to inhibit wild-type HIV-1 with EC50 values ranging of 0.105-14.531 μmol/L. In particular, compound 13f not only has high anti-HIV-1 activity (0.108 μmol/L), but also possesses low toxicity with a TI value of 1816.6. Furthermore, the major interactions of the inhibitor 13f with HIV-1 RT were also investigated using the molecular modelling. Our discovered structure-activity relationships (SARs) of these analogues may serve as an important clue for further optimizations.
- Sun, Yong,Lu, Cui-Lin,Wang, Chang-Yuan,Wang, Rui-Rui,Liu, Ke-Xin,Yang, Liu-Meng,Zhen, Yu-Hong,Zhang, Hou-Li,Wang, Chao,Zheng, Yong-Tang,Ma, Xiao-Dong
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p. 243 - 247
(2015/03/30)
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- Finding new elicitors that induce resistance in rice to the white-backed planthopper Sogatella furcifera
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Herein we report a new way to identify chemical elicitors that induce resistance in rice to herbivores. Using this method, by quantifying the induction of chemicals for GUS activity in a specific screening system that we established previously, 5 candidate elicitors were selected from the 29 designed and synthesized phenoxyalkanoic acid derivatives. Bioassays confirmed that these candidate elicitors could induce plant defense and then repel feeding of white-backed planthopper Sogatella furcifera.
- He, Xingrui,Yu, Zhaonan,Jiang, Shaojie,Zhang, Peizhi,Shang, Zhicai,Lou, Yonggen,Wu, Jun
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supporting information
p. 5601 - 5603
(2015/11/17)
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- Studies of O,O-Dimethyl α-(2,4-Dichlorophenoxyacetoxy) ethylphosphonate (HW02) as a new herbicide. 1. Synthesis and herbicidal activity of HW02 and analogues as novel inhibitors of pyruvate dehydrogenase complex
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On the basis of the previous work for optimization of O,O-diethyl α-(substituted phenoxyacetoxy)alkylphosphonates, further extensive syntheticmodifications were made to the substituents in alkylphosphonate and phenoxymoieties of the title compounds. New O,O-dimethyl α-(substituted phenoxyacetoxy)alkylphosphonates were synthesized as potential inhibitors of pyruvate dehydorogenase complex (PDHc). Their herbicidal activity and efficacy in vitro against PDHc were examined. Some of these compounds exhibited significant herbicidal activity and were demonstrated to be effective inhibitors of PDHc from three different plants. The structure-activity relationships of these compounds including previously reported analogous compoundswere studied by examining their herbicidal activities. Both inhibitory potency against PDHc and herbicidal activity of title compounds could be increased greatly by optimizing substituent groups of the title compounds. O,O-Dimethyl α-(2,4- dichlorophenoxyacetoxy)ethylphosphonate (I-5), which acted as a competitive inhibitor of PDHc with much higher inhibitory potency against PDHc from Pisum sativum and Phaseolus radiatus than from Oryza sativa, was found to be themost effective compound against broadleaf weeds and showed potential utility as herbicide.
- He, Hong-Wu,Yuan, Jun-Lin,Peng, Hao,Chen, Ting,Shen, Ping,Wan, Shu-Qing,Lee, Yanjun,Tan, Hong-Liang,He, Ya-Hui,He, Jun-Bo,Li, Yan
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scheme or table
p. 4801 - 4813
(2011/12/04)
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- Aza-Michael addition of acrylonitrile with 2-aryloxymethylbenzimidazole derivatives under microwave irradiation
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A simple, rapid, and highly efficient method has been developed for the aza-Michael addition of acrylonitrile to 2-aryl-oxymethylbenzimidazole derivatives in the presence of anhydrous potassium carbonate under microwave irradiation. A series novel of 1-cyanoethyl-2-aryloxymethylbenzimidazole derivatives have been prepared and characterised by 1H NMR, 13C NMR, IR spectra and elemental analysis.
- Wei, Tai-Bao,Hua, Mao-Tang,Shi, Hai-Xiong,Liu, Yong,Zhang, You-Ming
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scheme or table
p. 452 - 454
(2010/12/24)
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- Synthesis and anti-inflammatory activity of 2-aryloxy methyl oxazolines
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A series of potential biologically active 2-aryloxy methyl oxazolines 3a-n have been synthesized from substituted hydroxybenzenes 1a-n with good chemical yield. The compounds 3a-n were screened for their anti-inflammatory, ulcerogenic, cyclooxygenase activities and also for their acute toxicity. The potency of the compounds was compared with that of the standard drugs, aspirin and phenyl butazone. The outcome indicates that compounds 3b (48.2%), 3h (48.5%) and 3l (46.5%) offered significant anti-inflammatory activity with low ulcerogenic activity than the standard drugs.
- Khanum, Shaukath Ara,Khanum, Noor Fatima,Shashikanth
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body text
p. 4597 - 4601
(2009/04/06)
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- Induced helix of 2-(2-aminophenoxy)alkanoic acid oligomers as a δ-peptidomimetic foldamer
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Peptidomimetic foldamers were synthesized by oligomerizing derivatives of the δ-amino acid analogue, 2-(2-aminophenoxy)alkanoic acid. Single-crystal analysis of the tetramer reveals a 21-helical secondary structure stabilized by hydrogen bonding and the coiled stacking of aromatic rings. The M-helicity of 2-aminophenoxyacetic acid oligomers was induced by the incorporation of only a single chiral carbon of the N-terminal (R)-2-(2-nitrophenoxy)propionamide moiety. The solution state CD spectra demonstrated that the resulting helix induced a substantial Cotton effect. The secondary structure was further characterized by IR and NMR spectroscopy.
- Akazome, Motohiro,Ishii, Yuichi,Nireki, Tatsuya,Ogura, Katsuyuki
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p. 4430 - 4433
(2008/12/21)
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- Antimalarial activity enhancement in hydroxymethylcarbonyl (HMC) isostere-based dipeptidomimetics targeting malarial aspartic protease plasmepsin
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Plasmepsin (Plm) is a potential target for new antimalarial drugs, but most reported Plm inhibitors have relatively low antimalarial activities. We synthesized a series of dipeptide-type HIV protease inhibitors, which contain an allophenylnorstatine-dimethylthioproline scaffold to exhibit potent inhibitory activities against Plm II. Their activities against Plasmodium falciparum in the infected erythrocyte assay were largely different from those against the target enzyme. To improve the antimalarial activity of peptidomimetic Plm inhibitors, we attached substituents on a structure of the highly potent Plm inhibitor KNI-10006. Among the derivatives, we identified alkylamino compounds such as 44 (KNI-10283) and 47 (KNI-10538) with more than 15-fold enhanced antimalarial activity, to the sub-micromolar level, maintaining their potent Plm II inhibitory activity and low cytotoxicity. These results suggest that auxiliary substituents on a specific basic group contribute to deliver the inhibitors to the target Plm.
- Hidaka, Koushi,Kimura, Tooru,Ruben, Adam J.,Uemura, Tsuyoshi,Kamiya, Mami,Kiso, Aiko,Okamoto, Tetsuya,Tsuchiya, Yumi,Hayashi, Yoshio,Freire, Ernesto,Kiso, Yoshiaki
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scheme or table
p. 10049 - 10060
(2009/04/07)
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- A rapid and high-yield synthesis of aryloxyacetic acid in one pot under microwave irradiation and phase transfer catalysis conditions
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A series of aryloxyacetic acid 3a-h has been synthesized in one pot under microwave irradiation and phase transfer catalysis conditions. By the optimization of the reaction condition, a rapid, high-yield and efficient method for the preparation of aryloxyacetic acid is reported.
- Wei, Tai-Bao,Liu, Hong,Li, Man-Lin,Zhang, You-Ming
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p. 1312 - 1314
(2007/10/03)
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- Synthesis of analogs of juvenile hormons proceeding from phenol derivatives
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New potential juvenoids, esters of alkenoic and alkadienoic acids with phenoxy-and phenoxy-phenoxyethanol were synthesized, and also esters of phenoxyacetic acid with alkenols amd alkadienols.
- Yamansarova,Kukovinets,Kukovinets,Zainullin,Galin,Kunakova,Zorin,Tolstikov
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p. 246 - 255
(2007/10/03)
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- Synthesis of 1,1,1-trichloro-2,2-bis-(carboxymethoxyaryl)ethanes as potential antimicrobial and insecticidal agents
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Some new 1,1,1-trichloro-2,2-bis-(carboxymethoxyaryl)-ethanes 2a-t have been synthesised by the treating aryloxyacetic acid (two moles) with chloral hydrate (1 mole) in the presence of catalytic amount of conc. sulphuric acid. The aryloxyacetic acid are prepared by the reaction of substituted phenols with chloroacetic acid in the presence of aq. sodium hydroxide. The antimicrobial activity of these compounds have been assayed against various Gram+ve, Gram-ve bacteria and fungi. The constitution of the products have been elucidated by IR, 1H NMR and mass spectral data and elemental analyses.
- Purohit,Shah
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p. 618 - 622
(2007/10/03)
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- Syntheses of HIV-protease inhibitors having a peptide moiety which binds to GP120
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Some HIV-protease inhibitor derivatives having an N- carbomethoxycarbonyl-prolyl-phenylalanine benzyl ester (CPF) moiety as a binding site to gp120 were designed and synthesized. Almost all the compounds bearing CPF on the phenoxyacetyl group showed protease-inhibitory activity. Compounds 25a and 25b, which have the CPF moiety at the ortho- and meta- positions of the phenoxyacetyl group, respectively, had anti-HIV activity, although the others showed only protease-inhibitory activity. These results suggest that 25b binds to gp120 and inhibits HIV protease.
- Asagarasu, Akira,Uchiyama, Taketo,Achiwa, Kazuo
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p. 697 - 703
(2007/10/03)
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- Synthesis of dipeptide-type human immunodeficiency virus (HIV) protease inhibitors with a binding unit to GP120
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Some dipeptide-type human immunodeficiency virus (HIV) protease inhibitors derived from KNI-102, with a N-carbomethoxycarbonylprolyl- phenylalanine benzyl ester (CPF) moiety as a binding site to gp120, were synthesized. Compounds 11a showed 7 - 100 times higher HIV protease- inhibitory activity (11a; IC50 = 0.90 μg/ml, 1.1 μM) than the standard compound 3 or 4 (3; IC50 = 3.7 μg/ml, 7.7 μM, 4; IC50 = 75 μg/ml, 155 μM). Generally, the compounds substituted at the o-position of the phenoxyacetyl group 7a, 11a, 16a and 21a showed several times higher inhibitory activity than 3.
- Asagarasu, Akira,Takayanagi, Nao,Achiwa, Kazuo
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p. 867 - 870
(2007/10/03)
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- Solvent-free synthesis of substituted phenoxyacetic acids under microwave irradiation
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A comparison of microwave-activated vs. classical organic synthesis is presented for a variety of growth-regulator compounds with a phenoxyacetic acid structure. Microwave-assisted nucleophilic substitutions are safely and conveniently carried out in an open vessel, without any solvent. Yields are very good, and reaction times are extremely short.
- Nagy, Gabriela,Filip, Sorin V.,Surducan, Emanoil,Surducan, Vasile
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p. 3729 - 3736
(2007/10/03)
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- POLYMER SUPPORTED REAGENTS: USE OF ANION EXCHANGE RESIN IN THE SYNTHESIS OF ARYLOXY ACETIC ACIDS
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Phenoxides supported on Amberlite IRA 400 on reaction with sodium salt of chloroacetic acid gave corresponding aryloxy acetic acid in high yields.Interestingly nitrophenols, 4-hydroxy coumarin and p-hydroxy ethylbenzoate gave excellent yields of the product.
- Deshmukh, J. G.,Jagdale, M. H.,Mane, R. B.,Salunkhe, M. M.
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p. 479 - 484
(2007/10/02)
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- New Multidentate Compounds of Ether-Ester Type
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A series of ether-esters containing multidentate components have been prepared from phenoxyacetic acid.The ligands were synthesized from the appropriate phenoxyacetic acid chloride and various alcohols.Four types of new compounds have been obtained. - Keywords: Acyclic crown compounds; Ester-ether crown compounds; Multidentate ligands; Phenoxyacetic acid ester
- Lin, Whei Oh,de Souza, Maria C. Bastos Viera,Altoe, Antonio P.,Alt, Helmut G.
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p. 359 - 364
(2007/10/02)
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