- Design, synthesis, crystal structure, and herbicidal activity of novel pyrrolidine-2,4-dione derivatives incorporating an alkyl ether pharmacophore with natural tetramic acids as lead compounds
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In order to discover green herbicides with novel molecular scaffolds, natural tetramic acids were used as lead compounds to design and synthesize four pyrrolidine-2,4-dione derivatives incorporating a chainlike alkoxyalkyl moiety (4a-4d) and nineteen pyrrolidine-2,4-dione derivatives incorporating a substituted phenoxyethyl moiety (10a-10s)viasubstitution, acylation, cyclization, and acidification reactions. The synthesized target compounds were confirmed by FT-IR,1H NMR,13C NMR and HRMS spectral analyses. The single-crystal structure of compound10awas analyzed by X-ray diffraction, which revealed that the 1-hydroxyethylidene group links the third position of the pyrrolidine heterocycle through a double bond with theZ-configuration. The herbicidal activity was evaluated using barnyard grass (Echinochloa crus-galli) and rape (Brassica campestris) as model plants by a Petri dish culture method. Most target compounds were found to possess moderate to good inhibitory activities against the plant growth at 100 μg mL?1. Among them, the compounds10qand10nshowed the highest herbicidal activities against the roots of barnyard grass and rape seedlings with the corresponding inhibition rates of 65.6% and 84.0%, respectively. This result indicated that pyrrolidine-2,4-dione derivatives incorporating a substituted phenoxyethyl moiety are worthy of further structural optimization.
- Chen, Min,Geng, Chun-Wen,Han, Ling,Liu, Yu,Yu, Yong-Kai,Lu, Ai-Min,Yang, Chun-Long,Li, Guo-Hua
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p. 5621 - 5630
(2021/04/06)
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- Synthesis and pharmacological activity of a new series of 1-(1H-indol-4-yloxy)-3-(2-(2-methoxyphenoxy)ethylamino)-propan-2-ol analogs
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β-Adrenergic receptor antagonists are important therapeutics for the treatment of cardiovascular disorders. In the group of β-blockers, much attention is being paid to the third-generation drugs that possess important ancillary properties besides inhibiting β-adrenoceptors. Vasodilating activity of these drugs is produced through different mechanisms, such as nitric oxide (NO) release, β2-agonistic action, α1-blockade, antioxidant action, and Ca2t entry blockade. Here, a study on evaluation of the cardiovascular activity of five new compounds is presented. Compound 3a is a methyl and four of the tested compounds (3b–e) are dimethoxy derivatives of 1-(1H-indol-4-yloxy)-3-(2-(2-methoxyphenoxy)-ethylamino)propan-2-ol. The obtained results confirmed that the methyl and dimethoxy derivatives of 1-(1H-indol-4-yloxy)-3-(2-(2-methoxyphenoxy)ethylamino)propan-2-ol and their enantiomers possess α1- and β1-adrenolytic activities and that the antiarrhythmic and hypotensive effects of the tested compounds are related to their adrenolytic properties.
- Bednarski, Marek,Otto, Monika,Dudek, Magdalena,Ko?aczkowski, Marcin,Bucki, Adam,Siwek, Agata,Groszek, Gra?yna,Maziarz, El?bieta,Wilk, Piotr,Sapa, Jacek
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p. 211 - 223
(2018/05/08)
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- Identification of N-(2-Phenoxyethyl)imidazo[1,2-a]pyridine-3-carboxamides as New Antituberculosis Agents
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A series of imidazo[1,2-a]pyridine carboxamides (IPAs) bearing an N-(2-phenoxyethyl) moiety was designed and synthesized as new antitubercular agents. Seven 2,6-dimethyl IPAs demonstrated excellent in vitro activity (MIC: 0.025-0.054 μg/mL) against the drug susceptive H37Rv strain and two clinically isolated multidrug-resistant Mycobacterium tuberculosisstrains. Compound 10j displayed acceptable safety and pharmacokinetic properties, opening a new direction for further development.
- Wu, Zhaoyang,Lu, Yu,Li, Linhu,Zhao, Rui,Wang, Bin,Lv, Kai,Liu, Mingliang,You, Xuefu
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supporting information
p. 1130 - 1133
(2016/12/16)
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- Discovery of a new series of 5-HT1A receptor agonists
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Starting from compounds previously identified as α1-adrenoceptor antagonists that were also found to bind to the 5-HT1A receptor, in an attempt to separate the two activities, a new series of 5-HT1A receptor agonists was identified and shown to have high potency and/or high selectivity. Of these, compound 13, which combines high selectivity (5-HT1A/α1 = 151) and good agonist potency (pD2 = 7.82; Emax = 76), was found to be the most interesting.
- Franchini, Silvia,Prandi, Adolfo,Sorbi, Claudia,Tait, Annalisa,Baraldi, Annamaria,Angeli, Piero,Buccioni, Michela,Cilia, Antonio,Poggesi, Elena,Fossa, Paola,Brasili, Livio
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scheme or table
p. 2017 - 2020
(2010/07/07)
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- SUBSTITUTED 2H-[1,2,4]TRIAZOLO[4,3-A]PYRAZINES AS GSK-3 INHIBITORS
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The invention relates to compounds of formula (I) prodrugs thereof, and the pahrmaceutically acceptabel salts of the compounds and prodrugs, wherein Ra, Rb, R1 and R2 are as defined herein; pharmaceutical compositions thereof; and uses thereof.
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Page/Page column 33
(2010/02/11)
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- Phenoxypropanol connected with phenylpiperazine and phenoxyalkylamine terminal in its side chain
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The invention disclosed some 1,4-dihydropiridine derivative chemically have pharmacologically with adrenoceptor blocking and calcium channel blocker is now emerging. The compound of 1,4-dihydropiridine derivative wherein has the formula I, wherein R selected from four group as follow whetherin R present R1 selected from halogen(X), hydrogen(H), saturated C1-C6 alkyl chain, saturated C1-C6 alkyoxyl chain, R2 selected from R3 selected from halogen(X), hydrogen(H), saturated C1-C6 alkyl chain, saturated C1-C6 alkyoxyl chain, and O—(C1-C3)—CF3.
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