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Lu Gan et al.
Biomaterials, 25(22), 5303-5312 (2004-04-28)
Thin sol-gel-formed calcium phosphate (Ca-P) films were formed on sintered porous-surfaced implants as an approach to increasing the rate of bone ingrowth. The films were prepared using either an inorganic precursor solution (with calcium nitrate tetrahydrate and ammonium dihydrogen phosphate)...
A H Ismail et al.
Die Pharmazie, 56(7), 534-535 (2001-08-08)
Ferrier rearrangement of 3,4,6-tri-O-acetyl-D-glucal (1) in the presence of triethylphosphite afforded the 2,3-unsaturated pyranose 2. Deacetylation and simultaneous migration of the double bond to 1,2-position in the sugar moiety was achieved by stirring in sodium ethoxide. Tosylation with one equivalent...
Kyriacos Agapiou et al.
Journal of the American Chemical Society, 126(14), 4528-4529 (2004-04-09)
Exposure of enone substrates 1a-18a, which possess appendant ketone, ester, and nitrile moieties, to Et2Zn in the presence of catalytic Cu(OTf)2/P(OEt)3 provides the cyclized products in good to excellent yields and diastereoselectivities. These results represent the first use of ketones...
Siyang He et al.
Molecules (Basel, Switzerland), 26(4) (2021-02-11)
Diels-Alder reactions on the surface of nanoparticles allow a thermoreversible functionalization of the nanosized building blocks. We report the synthesis of well-defined magnetite nanoparticles by thermal decomposition reaction and their functionalization with maleimide groups. Attachment of these dienophiles was realized...
Rocky J Barney et al.
The Journal of organic chemistry, 76(8), 2875-2879 (2011-03-17)
Benzyl phosphonate esters often serve as reagents in Horner-Wadsworth-Emmons reactions. In most cases, they can be prepared from benzylic alcohols via formation of the corresponding halide followed by an Arbuzov reaction. To identify a more direct synthesis of phosphonate esters...
Yuanyong Yang et al.
Organic letters, 14(18), 4762-4765 (2012-09-06)
Pentanidium-catalyzed α-hydroxylation of 3-substituted-2-oxindoles using molecular oxygen has been developed with good yields and enantioselectivities. This reaction does not require an additional reductant such as triethyl phosphite, which was typically added to reduce the peroxide intermediate. The reaction was demonstrated...
Timo Rhauderwiek et al.
Chemical science, 9(24), 5467-5478 (2018-07-17)
The Ni-metallated porphyrin-based tetraphosphonic acid (Ni-tetra(4-phosphonophenyl)porphyrin, Ni-H8TPPP) was used for the synthesis of highly porous metal phosphonates containing the tetravalent cations Zr4+ and Hf4+. The compounds were thoroughly characterized regarding their sorption properties towards N2 and H2O as well as...
A Useful Synthesis of 1-Aminocyclopropanephosphonic Acid from Cyclopropanone Acetal.
Antoine Fadel
The Journal of organic chemistry, 64(13), 4953-4955 (2001-10-25)
Kersti B Nilsson et al.
Dalton transactions (Cambridge, England : 2003), (17)(17), 2303-2313 (2008-04-17)
Liquid ammonia, trialkyl phosphites, and especially trialkylphosphines, are very powerful electron-pair donor solvents with soft bonding character. The solvent molecules act as strongly coordinating ligands towards mercury(ii), interacting strongly enough to displace halide ligands. In liquid ammonia mercury(ii) chloride solutions...
Christine E Duval et al.
Analytica chimica acta, 947, 1-8 (2016-11-17)
This contribution describes the synthesis of robust extractive scintillating resin and its use in a flow-cell detector for the direct detection of uranium in environmental waters. The base poly[(4-methyl styrene)-co-(4-vinylbenzyl chloride)-co-(divinylbenzene)-co-(2-(1-napthyl)-4-vinyl-5-phenyloxazole)] resin contains covalently bound fluorophores. Uranium-binding functionality was added...
Stowell, J. K.; Widlanski, T. S. et al.
Tetrahedron Letters, 36, 1825-1825 (1995)
Gabriele Albertin et al.
Dalton transactions (Cambridge, England : 2003), 44(35), 15470-15480 (2015-08-04)
Diazoalkane complexes [Ru(Tp)(N2CAr1Ar2)(PPh3)L]BPh4 ( and ) [Tp = tris(pyrazolyl)borate; L = P(OMe)3, P(OEt)3; Ar1 = Ar2 = Ph; Ar1 = Ph, Ar2 = p-tolyl; Ar1Ar2 = C12H8] were prepared by allowing chloro-compounds RuCl(Tp)(PPh3)L to react with diazoalkane in the presence...
Katarzyna Czarnobaj et al.
Pharmaceutical development and technology, 17(6), 697-704 (2011-04-13)
The aim of this study was to evaluate the physical properties, chemical structure and bioactivity of sol-gel processed oxide (SiO(2)-CaO-P(2)O(5)) composites used as controlled release materials for Metronidazole-drug applied in periodontal disease treatment. The obtained composite materials were characterized by...
Amedjkouh, M.; Westerlund, K.
Tetrahedron Letters, 45, 5175-5175 (2004)
Victoria I Bunik et al.
Biochemistry, 44(31), 10552-10561 (2005-08-03)
The alpha-ketoglutarate dehydrogenase complex (KGDHC), a control point of the tricarboxylic acid cycle, is partially inactivated in brain in many neurodegenerative diseases. Potent and specific KGDHC inhibitors are needed to probe how the reduced KGDHC activity alters brain function. Previous...
Misner, J. W.; Fisher, J. W. et al.
Tetrahedron Letters, 44, 5991-5991 (2003)
Triethyl phosphite mediated domino reaction: direct conversion of omega-nitroalkenes into N-heterocycles.
Elena Merişor et al.
Angewandte Chemie (International ed. in English), 46(18), 3353-3355 (2007-03-21)
R J Young et al.
Molecular reproduction and development, 33(3), 347-356 (1992-11-01)
Appropriate software settings and optimum procedures were determined for the measurement of the motion parameters of rabbit spermatozoa by the CellSoft (Cryo Resources Ltd., Montgomery, NY) computer-assisted digital image analysis system. The system was used to follow motion parameter changes...
Kersti B Nilsson et al.
Inorganic chemistry, 45(17), 6912-6921 (2006-08-15)
The coordination chemistry of solvated Ag(I) and Au(I) ions has been studied in some of the most strong electron-pair donor solvents, liquid and aqueous ammonia, and the P donor solvents triethyl, tri-n-butyl, and triphenyl phosphite and tri-n-butylphosphine. The solvated Ag(I)...