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D251
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Showing 1-30 of 36 results for "D251" within Papers
Nanoscale, 3(5), 2130-2133 (2011-03-30)
Naphthalene diimide (NDI) bolaamphiphilic molecules (1) self-assemble in water to form organic nanoparticles, which exhibit self-assembly induced preassociated excimer formation and hence an enhanced green fluorescence.
Molecular microbiology, 74(4), 826-843 (2009-10-24)
Many toxic man-made compounds have been introduced into the environment, and bacterial strains that are able to grow on them are ideal model systems for studying the evolution of metabolic pathways and regulatory systems. Acidovorax sp. strain JS42 is unique
Journal of pharmaceutical sciences, 100(7), 2801-2815 (2011-02-22)
Spontaneous crystalline-to-amorphous phase transformation of organic or medicinal molecules in the presence of mesoporous materials has been observed, for which pathway was suggested to be via the vapor phase, that is, sublimation of the crystalline molecules followed by adsorption on
Journal of mass spectrometry : JMS, 49(11), 1181-1190 (2014-11-15)
Pressure-sensitive adhesives (PSA) are used to manufacture labels that are applied directly on the food. These adhesives could contain not only intentionally added compounds (IAS) to the adhesive formula but also non-intentionally added substances (NIAS), due to the impurities from
Total synthesis of the antibiotic branimycin.
Angewandte Chemie (International ed. in English), 49(11), 2050-2053 (2010-02-11)
Langmuir : the ACS journal of surfaces and colloids, 31(44), 12000-12008 (2015-10-16)
The hydrophobicity of surfactants has been described through different concepts used to guide the formulation of surfactant-water (SW) and surfactant-oil-water (SOW) systems. An integrated framework of hydrophobicity indicators could provide a complete tool for surfactant characterization, and insights on how
Journal of Asian natural products research, 11(9), 792-795 (2010-02-26)
A new decalin derivative, monascusic acid A (1), together with a new natural product (2), was isolated from the ethanol extract of red yeast rice. Their structures were elucidated by spectroscopic methods.
Antiproliferative and calcemic actions of trans-decalin CD-ring analogs of 1,25-dihydroxyvitamin D3.
Anticancer research, 29(9), 3579-3584 (2009-08-12)
1,25-Dihydroxyvitamin D3 [1,25(OH)2D3] has potent antiproliferative actions but calcemic effects obstruct its application in the treatment of hyperproliferative disorders. Therefore, analogs of 1,25-(OH)2D3 are designed with a clear dissociation between both effects. Here the biological activity of the trans-decalin CD-ring
The Journal of organic chemistry, 76(9), 3274-3285 (2011-03-31)
An unprecedented and highly diastereoselective 6-endo-trig cyclization of 2-alkenyl-1,3-dithiolanes has been developed yielding trans-decalins, an important scaffold present in numerous di- and triterpenes. The novelty of this 6-endo-trig cyclization stands in the stepwise mechanism involving 2-alkenyl-1,3-dithiolane, acting as a novel
Science (New York, N.Y.), 337(6100), 1322-1325 (2012-09-18)
Despite the growing importance of fluorinated organic compounds in drug development, there are no direct protocols for the fluorination of aliphatic C-H bonds using conveniently handled fluoride salts. We have discovered that a manganese porphyrin complex catalyzes alkyl fluorination by
Journal of the American Chemical Society, 133(6), 1614-1617 (2011-01-25)
Decalins bearing two axial -NHCONHAr substituents and an ester-linked alkyl side chain have been synthesized and studied as anion receptors and transporters. The design relates to steroid-based "cholapods" but is more compact and less intrinsically lipophilic. Transport rates depend on
Organic letters, 14(1), 366-369 (2011-12-14)
The addition of 0.5 equiv of TiCl(4) to (cyclo)alkanones tethered to α,β-unsaturated ketones afforded polyfunctionalized diquinanes, hydrindanes, and decalines. These products, resulting from a Michael-aldol or a Baylis-Hillman reaction, can be obtained with high or total diastereoselectivity in moderate to
Journal of natural products, 75(4), 567-571 (2012-03-08)
Five new decalin derivatives (1-5), together with two known compounds (6 and 7), were isolated from the ethyl acetate extract of red yeast rice. Their structures were elucidated by means of NMR and mass spectroscopic analyses. Monascusic lactone A (1)
Journal of the American Chemical Society, 134(42), 17520-17525 (2012-09-27)
The stacking interaction between π systems is a well-recognized structural motif, but stacking between σ systems was long considered of secondary importance. A recent paper points out that σ stacking can reach the energy of chemical bonds and concludes that
Nature communications, 6, 5977-5977 (2015-01-20)
Metamaterials are a promising new class of materials, in which sub-wavelength physical structures, rather than variations in chemical composition, can be used to modify the nature of their interaction with electromagnetic radiation. Here we show that a metamaterials approach, using
Small (Weinheim an der Bergstrasse, Germany), 11(43), 5790-5799 (2015-09-24)
Liposomes represent a leading class of nanoparticles for drug delivery. While a variety of techniques for liposome synthesis have been reported that take advantage of microfluidic flow elements to achieve precise control over the size and polydispersity of nanoscale liposomes
Biomicrofluidics, 8(4), 044109-044109 (2014-11-08)
A technique for microfluidic, pH modulated DNA capture and purification using chitosan functionalized glycidyl methacrylate monoliths is presented. Highly porous polymer monoliths are formed and subsequently functionalized off-chip in a batch process before insertion into thermoplastic microchannels prior to solvent
Biosensors & bioelectronics, 39(1), 139-144 (2012-08-14)
A highly sensitive and selective method is developed for the simultaneous detection of dopamine (DA) and acetaminophen (AP) by reactive blue-4 (RB4) dye entrapped poly1,5-diaminonaphthalne (polyDAN) composite film layer. The polyDAN-RB4 composite is electrochemically developed at glassy carbon electrode. The
Discussion on "A comprehensive two-dimensional gas chromatography coupled with quadrupole mass spectrometry approach for identification of C10 derivatives from decalin" by C. Flego, N. Gigantiello, W.O. Parker, Jr., V. Calemma [J. Chromatogr. A 1216 (2009) 2891].
Journal of chromatography. A, 1217(37), 5872-5873 (2010-08-11)
Huan jing ke xue= Huanjing kexue, 31(3), 793-800 (2010-04-03)
In this study,two elite rice inbred lines, Nipponbare and Mastumae were selected and irrigated with naphthalene solution with different concentrations. Epigenetic instabilities in the blade of the plants in tillering and heading stage were assessed by MSAP marks. The results
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 77(5), 998-1004 (2010-09-25)
Oleum (fuming sulphuric acid), a well known superacid, was used as medium for the generation of the radical cation of a series of selected PAHs. The resulting radical cation spectra were studied by electronic absorption spectroscopy. Not only common PAHs
Chemical communications (Cambridge, England), 48(6), 901-903 (2011-12-06)
Total synthesis of antimalarial diterpenoid (+)-kalihinol A, isolated from marine sponge Acanthella sp., is achieved. This total synthesis involves regioselective alkylation of an epoxide, construction of a tetrahydropyran ring by iodo-etherification, construction of a cis-decalin ring by intramolecular Diels-Alder reaction
Organic letters, 13(14), 3580-3583 (2011-06-16)
Regio-, stereo-, and facial selective [4 + 2] cycloadditions between highly activated vinyl sulfones and 1,3-dienes derived from (R)-4-tert-butyldimethylsilyloxy-2-cyclohexen-1-one provide a powerful approach for the asymmetric synthesis of compounds containing the bicyclo[2.2.2]octanone carbon skeleton. This new methodology has been successfully
The journal of physical chemistry. B, 116(1), 203-210 (2011-12-06)
A modification of the CHARMM36 lipid force field (C36) for cholesterol, henceforth, called C36c, is reported. A fused ring compound, decalin, was used to model the steroid section of cholesterol. For decalin, C36 inaccurately predicts the heat of vaporization (~10
The Journal of chemical physics, 137(4), 044512-044512 (2012-08-03)
(1)H relaxation dispersion of decalin and glycerol solutions of nitroxide radicals, 4-oxo-TEMPO-d(16)-(15)N and 4-oxo-TEMPO-d(16)-(14)N was measured in the frequency range of 10 kHz-20 MHz (for (1)H) using STELAR Field Cycling spectrometer. The purpose of the studies is to reveal how
Organic letters, 13(9), 2200-2203 (2011-04-12)
An efficient and unprecedented organocatalytic reaction of γ-nitroketones with α,β-unsaturated aldehydes to give polyfunctionalized [4.4.0] bicyclic skeletons was developed. The diphenylprolinol silyl ether mediated nitro-Michael/Aldol reaction afforded the hexa-substituted decalin carboaldehydes with excellent diastereo- and enantioselectivity (up to >99:1 dr
Chemistry, an Asian journal, 7(5), 944-956 (2012-02-09)
We have previously reported that the trimeric Zn(2+)-cyclen complex (tris(Zn(2+)-cyclen), [Zn(3)L(1)](6+)) and the trianion of trithiocyanuric acid (TCA(3-)) assembled in a 4:4 ratio to form a cuboctahedral supramolecular cage, [(Zn(3)L(1))(4)(TCA(3-))(4)](12+) (hereafter referred to as a Zn-cage), in neutral aqueous solution
Colloids and surfaces. B, Biointerfaces, 122, 760-766 (2014-09-06)
Lubricating properties of bovine submaxillary mucin (BSM) on a compliant, hydrophobic surface were studied as influenced by impurities, in particular bovine serum albumin (BSA), at macro and nanoscale contacts by means of pin-on-disk tribometry and friction force microscopy (FFM), respectively.
Organic letters, 14(11), 2886-2889 (2012-05-19)
A concise enantioselective synthesis of (-)-teucvidin has been achieved. Our synthetic strategy involved the diastereoselective Michael/Conia-ene cascade cyclization reaction for rapid establishment of the cis-decalin skeleton with three new stereogenic centers in one pot (72%, single diastereomer), the epoxidation/dealkoxycarbonylation protocol
The journal of physical chemistry. B, 113(31), 10628-10640 (2009-07-16)
The conformational dynamics and orientational behavior of two model cyclic molecules, cis-decalin (cis-dec) and tetrahydrofurane (THF), dissolved in weakly ordering, polypeptidic chiral liquid crystals (CLCs) are theoretically discussed and experimentally investigated using deuterium and carbon-13 NMR spectroscopies. The analysis of
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