1889-01-6Relevant academic research and scientific papers
Phase transfer catalyzed synthesis of diaryl 1,4-phenylene dioxydiacetate
Wei, Taibao,Chen, Jichou,Wang, Xicun,Zhang, Youming,Wang, Lailai
, p. 1447 - 1454 (1996)
The title compounds 3a-3o were prepared with high yield via the reaction of 1,4-phenylenedioxydiacetyl chloride with various substituted phenols under the condition of liquid-liquid phase transfer catalysis, using polyethylene glycol - 400 as the catalyst.
Synthesis, Structure, and Properties of the 2-[5-(Aryloxyacetyl)-Amino-1,3,4-Thiadiazol-2-Ylthio] Propionate Derivatives
Hu, Bing,Zhai, Yue-Yuan,Zhang, Ling,Zhang, You-Ming,Wei, Tai-Bao
, p. 1337 - 1345 (2015/10/29)
A series of novel 2-[5-(aryloxyacetyl)-amino-1,3,4-thiadiazol-2-ylthio] propionate derivatives were synthesized in high yield, and their structures were characterized by IR, 1H NMR, 13C NMR, and elemental analysis, coupled with one selected single-crystal X-ray structure determination. The herbicidal activities of target compounds were assessed. The preliminary bioassay results showed that some compounds exhibited moderate to strong herbicidal symptoms in preemergence and postemergence tests. At 150 g/ha, S. tritici. show tolerance, while E. crus-galli L., E. Dahuricus, A. retroflexus, and C. glaucum L. were killed or severely injured. The activity of some compounds was comparable to the commercial herbicide 2,4-D. A suitable electron-withdrawing substituent at the 2-and/or 4-position of the phenyl ring was essential for high herbicidal activity. Moreover, the antifungal activities of the compounds have also been studied. The compounds were found to possess broad-spectrum antifungal activity.
Functionalized biodegradable triclosan monomers and oligomers for controlled release
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, (2011/11/13)
This invention relates to the discovery of functionalized triclosan monomers and oligomers that, when incorporated into a substrate of, or applied as part of a coating to, medical devices and/or consumer products may extend the duration of antimicrobial properties to the medical devices and/or consumer products.
FUNCTIONALIZED BIODEGRADABLE TRICLOSAN MONOMERS AND OLIGOMERS FOR CONTROLLED RELEASE
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, (2009/05/29)
This invention relates to the discovery of functionalized triclosan monomers and oligomers that, when incorporated into a substrate of, or applied as part of a coating to, medical devices and/or consumer products may extend the duration of antimicrobial properties to the medical devices and/or consumer products.
Dihydroxy aromatic compounds and methods for preparation
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Page/Page column 15, (2010/11/25)
A dihydroxy aromatic compound having a Formula (I), wherein R1 is a C6–C60 aromatic divalent functionality, R2 at each occurrence, can be the same or different and is independently at each occurrence selected from the group consisting of a cyano functionality, a nitro functionality, a halogen, an aliphatic functionality having 1 to 10 carbons, a cycloaliphatic functionality having 3 to 10 carbons and an aromatic functionality having 6 to 10 carbons, and “n” is an integer having a value of 0 to 4.
Cyclobis(paraquat-4,4'-biphenylene) - An Organic Molecular Square
Asakawa, Masumi,Ashton, Peter R.,Menzer, Stephan,Raymo, Francisco M.,Stoddart, J. Fraser,et al.
, p. 877 - 893 (2007/10/03)
Template-directed syntheses of cyclobis(paraquat-4,4'-biphenylene) (1) - a molecular square - have been achieved by use of ?-electron-rich macrocyclic hydroquinone-based and acyclic ferrocene-based templates.In particular, the use of a polyether-disubstituted ferrocene derivative as a template permits synthesis of 1 (which is accessible only in very low yields without templates) on a preparative scale.Furthermore, the use of a macrocyclic hydroquinone-based polyether template incorporating an ester function in one polyether chain - an "oriented" macrocycle - affords a 1:1 mixture of two topologically stereoisomers catenanes.Ester hydrolysis of the ?-electron-rich macrocyclic components mechanically interlocked with 1 within the catenated structures releases the tetracationic cyclophane in quantitative yield as a result of the degradation of the catenanes.The molecular square has been characterized by X-ray crystallography, FAB mass spectrometry, 1H NMR and 13C NMR spectroscopies, and elemental analysis.The binding properties of 1 and of the smaller cyclophane cyclobis(paraquat-p-phenylene) toward a series of ?-electron-rich guests have also been investigated with the above techniques and UV/VIS spectroscopy.The self-assembly of the resulting supramolecular complexes in solution and in the solid state is driven mainly by ?-? stacking interactions and hydrogen-bonding interactions, as well as by edge-to-face T-type interactions.In particular, the complexation of ferrocene or a ferrocene-based derivative within the cavity of 1 suggests the possibility of constructing functioning ferrocene-based molecular and supramolecular devices that can be controlled electrochemically in the form of catenanes, rotaxanes, and pseudorotaxanes. -Keywords: catenanes; second-sphere coordination; self-assembly; template syntheses; topological stereoisomerism
THE FORMATION OF COMPLEXES BETWEEN AZA DERIVATIVES OF CROWN ETHERS AND PRIMARY ALKYLAMMONIUM SALTS. PART 9. BICYCLIC DERIVATIVES OF DIAZA CROWN ETHERS
Kyte, Andrew B.,Owens, Ken A.,Sutherland, Ian O.,Newton, Roger F.
, p. 1921 - 1928 (2007/10/02)
The bridged diaza-15-crown-5 derivatives (12a-c) and (16) form complexes with alkylammonium cations RN(+)H3 in organic solvents.The 1H n.m.r.spectra of the complexes (12).RN(+)H3 show that they are mostly of the inclusion type (3) but in a few cases a second diastereoisomeric complex, possibly (4), is also formed.These bicyclic hosts do not show particularly high selectivity in complexation on the basis of competition between pairs of guest cations.
