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M Reza Naimi-Jamal et al.
Molecular diversity, 14(3), 473-477 (2010-04-08)
Solvent-free one-pot synthesis of 2-amino-4H-chromene scaffold is described in a very simple, efficient, and environmentally benign method using sodium carbonate as a cheap and non-toxic catalyst with up to excellent yields.
Divya P Narayanan et al.
Journal of colloid and interface science, 520, 70-80 (2018-03-13)
A one pot synthesis of carbon dot incorporated porous coconut shell char derived sulphonated catalyst is reported here for the first time and is effectively used in the multicomponent synthesis of amidoalkyl naphthol. Macroporous nature of the char is revealed
Stephen R Davies et al.
Drug testing and analysis, 11(2), 257-266 (2018-08-22)
Two human metabolites of the REV-ERB agonist SR9009, identified by researchers with an interest in sports doping control, have been synthesized and assessed for purity. The synthesis employed was a modification of published procedures for the parent SR9009, careful attention
Abel T Demissie et al.
Journal of the American Chemical Society, 137(27), 8819-8828 (2015-06-23)
We report the systematic characterization of anisotropic, π-conjugated oligophenyleneimine (OPI) films synthesized using stepwise imine condensation, or "click" chemistry. Film synthesis began with a self-assembled monolayer (SAM) of 4-formylthiophenol or 4-aminothiophenol on Au, followed by repetitive, alternate addition of terephthalaldehyde
Yuan Chen et al.
Polymers, 11(6) (2019-06-07)
In this paper, we report chemical modifications of inulin by seven kinds of aromatic Schiff bases, which are different from their substituent groups. The obtained inulin derivatives were confirmed by FTIR, 1H NMR, and 13C NMR. Then, we studied their
Carlotta Raviola et al.
The Journal of organic chemistry, 77(20), 9094-9101 (2012-09-12)
The nonaccessibility of phenyl cations by irradiation of electron-poor aryl chlorides was circumvented by transforming the carbonyl group of aromatic ketones or aldehydes into the corresponding 1,3-dioxolanes and the carboxyl group of benzoate ester into an orthoester functionality. This transformation
Adnan Ashraf et al.
European journal of medicinal chemistry, 159, 282-291 (2018-10-09)
Chalcones and 1,2-benzothiazines are two important classes of bioactive compounds, each scaffold endowed with diverse pharmacological activities. Combining both of these pharmacophores in a single molecule was aimed to yield multi-modal agents. Herein, we report a series of hybrid compounds
Rabia Babar et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 217, 223-236 (2019-04-04)
A novel series Y-shaped π-expanded imidazole based chromophores was designed and synthesized. The series contains thirteen 2-aryl-4,5-bis[2-(aryl)vinyl)]-1H-imidazoles (6a-6m), which were characterized by spectroscopic analysis. The structures of compounds 6d and 6j were also confirmed by X-ray crystallographic analysis. The optical
Ze Yun Li et al.
Phytochemical analysis : PCA, 26(1), 8-14 (2014-06-11)
Quantitative (1)H-NMR (qNMR) is a well-established method for quantitative analysis and purity tests. Applications have been reported in many areas, such as natural products, foods and beverages, metabolites, pharmaceuticals and agriculture. The characteristics of quantitative estimation without relying on special
Keli Gu et al.
Bioorganic & medicinal chemistry, 15(14), 4775-4799 (2007-05-22)
A new class of 2,5-disubstituted-dioxacycloalkanes were designed and synthesized via stereoselective synthetic method as cancer chemoprevention agents. The anti-inflammatory activities of these compounds were tested using the xylene-induced mouse ear edema model. Some of these compounds exhibited comparable or better
Ruoran Zhang et al.
Carbohydrate polymers, 171, 1-8 (2017-06-06)
Staudinger-related reactions between azides and phosphines are important in organic chemistry due to their chemoselectivity, high efficiency, and mild reaction conditions. Staudinger reduction of azides affords highly reactive iminophosphorane ylides; the reactivity of the negatively charged ylide nitrogen atom has
Kanchan Mishra et al.
ChemSusChem, 12(4), 881-889 (2018-12-15)
The band gap of a material can be affected by factors such as size, doping materials, and oxygen vacancies. The decrease in band gap and change in state of ZrO2 with the addition of ZnO indicates interfacial interactions between ZrO2
Mohammed M Rahman et al.
Designed monomers and polymers, 21(1), 82-98 (2018-05-31)
A new category of thermally stable hybrid polyarylidene(azomethine-ether)s and copolyarylidene(azomethine-ether)s (PAAP) based on diarylidenecycloalkanones has been synthesized using solution polycondensation method. For potential cationic sensor development, a thin layer of PAAP onto a flat glassy carbon electrode (GCE, surface area:
Jairo Quiroga et al.
Acta crystallographica. Section C, Crystal structure communications, 69(Pt 9), 1039-1042 (2013-09-06)
The title compound, C27H25Cl2N3, is an unexpected but high-yield product from the microwave-mediated reaction between 3-tert-butyl-N-4-chlorobenzyl-1-phenyl-1H-pyrazol-5-amine and 4-chlorobenzaldehyde. Inversion-related pairs of molecules are linked by C-H···π(arene) hydrogen bonds to form cyclic centrosymmetric dimers, and dimers of this type are linked
Xuemei Tian et al.
Enzyme and microbial technology, 84, 32-40 (2016-02-02)
The first Novozym 435 lipase-catalyzed Morita-Baylis-Hillman (MBH) reaction with amides as co-catalyst was realized. Results showed that neither Novozym 435 nor amide can independently catalyze the reaction. This co-catalytic system that used a catalytic amount of Novozym 435 with a
[Experimental substantiation of an approximate safe level of p-chlorobenzaldehyde in the air of the work area].
A I Khalepo et al.
Gigiena truda i professional'nye zabolevaniia, (2)(2), 50-51 (1987-02-01)
Alemnew Geto et al.
Environment international, 129, 400-407 (2019-06-04)
Bentazone is one of the most problematic pesticides polluting groundwater resources. It is on the list of pesticides that are mandatory to analyze at water work controls. The current pesticide measuring approach includes manual water sampling and time-consuming chromatographical quantification
Gonzalo de Gonzalo et al.
Carbohydrate polymers, 199, 365-374 (2018-08-26)
An efficient and mild procedure was developed for the preparation of three chitosan-supported ureas containing electron-withdrawing groups. These catalysts were characterized and employed as organocatalysts in different transformations, including the enantioselective cyanosilylation of α-ketoesters and aldehydes, the asymmetric addition of
Andreii S Kritchenkov et al.
International journal of biological macromolecules, 149, 682-692 (2020-01-29)
The metal-assisted nitrone-nitrile cycloaddition reaction is apply to empower chitosan chemistry. The ultrasonic irradiation has proven to efficiently accelerate the cycloaddition affording new heterocyclic (1,2,4-oxadiazoline) chitosan derivatives and avoiding ultrasonic degradation of the chitosan macromolecules. By varying the nitrone nature
Stephan Mokesch et al.
Frontiers in chemistry, 8, 209-209 (2020-04-23)
A series of 2-phenylbenzothiazole derivatives and their corresponding organometallic ruthenium(II) and osmium(II) complexes were synthesized, designed to exploit both, the attributes of the half-sandwich transition metal scaffold and the bioactivity spectrum of the applied 2-phenylbenzothiazoles. All synthesized compounds were characterized
Bin-Yu Wen et al.
Journal of Asian natural products research, 21(7), 702-715 (2019-01-01)
Desmosdumotin C (Des C), a natural product isolated from the roots of Desmos dumosus, has shown good antitumor activity. A three dimensional quantitative structure-activity relationship (QSAR) study using the comparative molecular field analysis (CoMFA) method was performed on 32 Des
Mahnaz Yousefian et al.
Carbohydrate polymers, 228, 115393-115393 (2019-10-23)
In this study, a novel copper-based metal-organic framework (Cu-MOF)-immobilized modified chitosan (CS-CA), CS-CA/Cu-MOF, has been constructed easily and applied as an extremely efficient and economic mesoporous catalyst for the Knoevenagel condensation between aromatic aldehydes with malononitrile under mild reaction conditions.
Yun-Na Liu et al.
Acta crystallographica. Section C, Structural chemistry, 71(Pt 7), 554-563 (2015-07-07)
A series of mono- and di-Schiff bases formed between benzil dihydrazone {BDH; systematic name: (1Z)-[(2E)-2-hydrazinylidene-1,2-diphenylethylidene]hydrazine} and three isomeric chlorobenzaldehydes were designed and synthesized to be used as model compounds to help to explain the reaction mechanisms for the formation of
Willsingh Anbu Durai et al.
Journal of fluorescence, 30(2), 275-289 (2020-01-31)
Colorimetric sensors have attracted wide scope of attentions due to its fascinating advantages, like handy, equipment-free and naked eye detections. In this investigation, a new and novel hydrazone based dual-responsive ratiometric/colorimetric chemosensor have been developed for highly selective and sensitive
Gu-cai Li et al.
Die Pharmazie, 70(8), 511-514 (2015-09-19)
Five indolin-2-one derivatives bearing piperazinylbutyl side chains attached to the amide nitrogen were synthesized from 2-indolinone. 1-(4-Bromobutyl)-indolin-2-one was reacted with 1-piperazinecarboxaldehyde to form 1-(4-(4-formyl-1-piperazinyl)butyl)indolin-2-one (2). In the presence of H2SO4, the aldehyde moiety was removed from 1-(4-(4-formyl-1-piperazinyl)butyl)indolin-2-one and then 1-(4-(1-piperazinyl)butyl)indolin-2-one
High-order self-assembly of G-quadruplex DNA: Nano-network formation under the guidance of arene ruthenium(II) complexes.
Qiong Wu et al.
Journal of inorganic biochemistry, 189, 81-90 (2018-09-23)
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