95870-54-5Relevant academic research and scientific papers
Two new methods to form substituted oligoethylene glycols
Krakowiak, Krzysztof E.,Bradshaw, Jerald S.,Huszthy, Peter
, p. 2853 - 2856 (1994)
1-Bromo-2-trityloxyethane (1) and 1-allyloxymethyl-2-trityloxyethanol (2) react readily at room temperature with substituted oligoethylene glycols or the ditosylate derivative of an oligoethylene glycol, respectively, to form the extended, ditrityl-protected, substituted oligoethylene glycols in high yields. The trityl groups are easily removed by acidified methanol in CH2Cl2 to give the extended, substituted oligoethylene glycols.
Modular synthesis of dihydroxyacetone monoalkyl ethers and isosteric 1-hydroxy-2-alkanones
Güclü, Deniz,Rale, Madhura,Fessner, Wolf-Dieter
supporting information, p. 2960 - 2964 (2015/04/27)
Straightforward methods for the efficient, systematic preparation of libraries of the title compound classes have been evaluated. A general and efficient modular route to dihydroxyacetone monoethers was developed based on trityl glycidol, which, through epoxide opening, oxidation, and deprotection, provided variously alkylated ethers by three routine operations in good overall yields (eight examples, 24-59 %). The preparation of structurally related 1-hydroxyalkanones depends on the availability of the most economic starting materials and on their physicochemical properties. Thus, the most practical one-step approaches consisted of the sec-selective oxidation of short-chain 1,2-diols (≤ C6) using NaOCl, and the direct ketohydroxylation of 1-alkenes (≥ C6) using buffered stoichiometric KMnO4 or catalytic RuO4 with reoxidation by oxone, for which mostly good overall yields were achieved on a multigram scale (nine examples, 15-78 %).
2,2'-Bipyridine lariat calixcrowns: A new class of encapsulating ligands forming highly luminescent Eu3+ and Tb 3+ complexes
Fischer, Claudia,Sarti, Gianluca,Casnati, Alessandro,Carrettoni, Barbara,Manet, Ilse,Schuurman, Ruud,Guardigli, Massimo,Sabbatini, Nanda,Ungaro, Rocco
, p. 1026 - 1034 (2007/10/03)
A new class of calix[4]arene crown ethers with one or two bipyridines appended to the polyether ring (lariat calixcrowns) have been designed and synthesized; the luminescence properties of their Eu3+ and Tb3+ complexes have been studied in acetonitrile. In this solvent, long lifetimes for the metal emitting states and high metal-luminescence intensities obtained upon ligand excitation have been observed in both Eu3+ and Tb3+ complexes. The association constants in methanol have been determined for some of the complexes studied.
The reaction between epichlorohydrin and polysaccharides: Part 1, syntheses of some model substances with non-cyclic substituents
Holmberg, Lars,Lindberg, Bengt,Lindqvist, Bengt
, p. 213 - 222 (2007/10/02)
Five derivatives of methyl α-D-glucopyranoside, in which the substituents form noncyclic structures, have been prepared as model substances for possible structural elements formed on reaction of polysaccharides with epichlorohydrin.The substances were converted into the permethylated alditol-1-d derivatives and characterised by CIMS and EIMS.
