2950-82-5Relevant academic research and scientific papers
Semiconductive and magnetic one-dimensional coordination polymers of Cu(II) with modified nucleobases
Amo-Ochoa, Pilar,Castillo, Oscar,Gomez-Garcia, Carlos J.,Hassanein, Khaled,Verma, Sandeep,Kumar, Jitendra,Zamora, Felix
, p. 11428 - 11437 (2013)
Four new copper(II) coordination complexes, obtained by reaction of CuX2 (X = acetate or chloride) with thymine-1-acetic acid and uracil-1-propionic acid as ligands, of formulas [Cu(TAcO)2(H 2O)4]·4H2O (1), [Cu(TAcO) 2(H2O)2]n (2), [Cu 3(TAcO)4(H2O)2(OH)2] n·4H2O (3), and [Cu3(UPrO) 2Cl2(OH)2(H2O)2] n (4) (TAcOH = thymine-1-acetic acid, UPrOH = uracil-1-propionic acid) are described. While 1 is a discrete complex, 2-4 are one-dimensional coordination polymers. Complexes 2-4 present dc conductivity values between 10-6 and 10-9 S/cm-1. The magnetic behavior of complex 2 is typical for almost isolated Cu(II) metal centers. Moderate-weak antiferromagnetic interactions have been found in complex 3, whereas a combination of strong and weak antiferromagnetic interactions have been found in complex 4. Quantum computational calculations have been done to estimate the individual "J" magnetic coupling constant for each superexchange pathway in complexes 3 and 4. Compounds 2-4 are the first known examples of semiconductor and magnetic coordination polymers containing nucleobases.
Carbon nanotube-nucleobase hybrids: Nanorings from uracil-modified single-walled carbon nanotubes
Singh, Prabhpreet,Toma, Francesca Maria,Kumar, Jitendra,Venkatesh,Raya, Jesus,Prato, Maurizio,Verma, Sandeep,Bianco, Alberto
, p. 6772 - 6780 (2011)
Single-walled carbon nanotubes (SWCNTs) have been covalently functionalized with uracil nucleobase. The hybrids have been characterized by using complementary spectroscopic and microscopic techniques including solid-state NMR spectroscopy. The uracil-functionalized SWCNTs are able to self-assemble into regular nanorings with a diameter of 50-70 nm, as observed by AFM and TEM. AFM shows that the rings do not have a consistent height and thickness, which indicates that they may be formed by separate bundles of CNTs. The simplest model for the nanoring formation likely involves two bundles of CNTs interacting with each other via uracil-uracil base-pairing at both CNT ends. These nanorings can be envisaged for the development of advanced electronic circuits. Copyright
Symmetrical and unsymmetrical α,ω-nucleobase amide-conjugated systems
Boncel, Slawomir,Mazka, MacIej,Motyka, Radoslaw,Walczak, Krzysztof Z.,Koziol, Krzysztof K. K.
scheme or table, (2010/07/09)
We present the synthesis and selected physicochemical properties of several novel symmetrical and unsymmetrical α,ω-nucleobase mono-and bis-amide conjugated systems containing aliphatic, aromatic or saccharidic linkages. The final stage of the synthesis i
Novel acyclic amide-conjugated nucleosides and their analogues
Boncel, Slawomir,Walczak, Krzysztof
experimental part, p. 103 - 117 (2009/06/18)
An effective one-step synthesis of new amide-conjugated nucleosides and their analogues, in the presence of 4-(4,6-dimethoxy-1,3,5-triazin-2-yl)-4- methylmorpholinium chloride (DMT-MM) as the condensing agent, is presented. Substrate subunits carrying carboxylic group were obtained by acidic hydrolysis of Michael-type adducts of various 5-substituted uracil derivatives to methyl acrylate. Amine substrate was synthesized by reduction of 1-(2′- cyanoethyl)thymine with sodium borohydride in the presence of nickel (II) chloride as catalyst. Other applied amine substrates were 5′-amino- 5′-deoxythymidine and 5-aminouracil. Copyright Taylor & Francis Group, LLC.
Oligopyrrole carboxamides linked with a nucleobase as potential DNA minor groove binding ligands: Synthesis, DNA binding and biological evaluation
Keuser,Pindur, Ulf
, p. 261 - 268 (2007/10/03)
The synthesis of a series of new oligopyrrole carboxamides closely related to netropsin and distamycin A, linked with a nucleobase is reported. The new compounds possess similar structure elements as the known peptide nucleic acids which are interesting s
SYNTHESIS OF REGIOSPECIFICALLY SUBSTITUTED PYRIMIDYL DERIVATIVES AND THEIR INCORPORATION INTO PENEMS
Capraro, Hans-Georg,Lang, Marc,Schneider, Peter
, p. 643 - 652 (2007/10/02)
Syntheses of regiospecifically substituted pyrimidines are described.Depending on the reaction conditions, N1- or N3-substituted pyrimidines are obtained.It has been shown that substitution on uracil under Mitsunobu conditions yields N1-substituted products.Incorporation of these derivatives into the penem nucleus gives penem antibiotics with extremely long half-lives.
ACYLATION OF POLYMETHYLENEDIAMINES BY 3-(1-URACILYL)PROPIONIC ACID
Lulle, I. Zh.,Paegle, R. A.,Lidak, M. Yu.,Krishane, V. E.
, p. 1228 - 1230 (2007/10/02)
The reaction of pentafluorophenyl 3-(1-uracilyl)propionate with polymethylenediamines gives N,N'-bispolymethylenediamines.
Synthesis of 1,2:5,6-Di-O-isopropylidene-3-O--α-D-glucofuranose and 1,2-Mono-O-isopropylidene-6-O--α-D-glucofuranose
Ouchi, Tatsuro,Jokei, Satoshi,Chikashita, Hidenori
, p. 935 - 936 (2007/10/02)
1,2:5,6-Di-O-isopropylidene-3-O--α-D-glucofuranose and 1,2-mono-O-isopropylidene-6-O--α-D-glucofuranose were synthesized.
