Bifunctional thioureas
Supported bifunctional thioureas as recoverable and reusable catalysts for enantioselective nitro-Michael reactions
... supported bifunctional thioureas on sulfonylpolystyrene resins has been studied in the nitro- Michael addition of different nucleophiles to trans-β-nitrostyrene ...
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Chiral Bifunctional Thioureas and Squaramides Grafted into Old Polymers of Intrinsic Microporosity for Novel Applications
... chiral bifunctional thioureas and squaramides by modification of the very well-known polymers of intrinsic microporosity (PIM), specifically PIM-1 and PIM-CO-1, to be used as recoverable ...
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Recyclable Chiral Bifunctional Thioureas Derived from [60]Fullerene and Their Use as Highly Efficient Organocatalysts for the Asymmetric Nitro-Michael Reaction
... chiral bifunctional thioureas because the low solubility of the fullerene derivatives in organic solvents [9] facilitates the recovering and reusing of the ...
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Short Synthesis of Novel Recyclable Chiral Bifunctional Thioureas from Aminoalkyl Polystyrene and their use as Organocatalysts in Stereoselective aza-Henry Reaction
... Eleven novel supported chiral bifunctional thioureas have been prepared, in one or two steps, from commercially available aminoalkyl polystyrene resins. The synthesis of polymeric materials was carried out ...
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Chiral Bifunctional Thioureas and Squaramides and Their Copolymers as Recoverable Organocatalysts Stereoselective Synthesis of 2 Substituted 4 Amino 3 nitrobenzopyrans and 3 Functionalized 3,4 Diamino 4H Chromenes
... 4-Aminochromanes is a family of natural and synthetic products with important biological activity, and their synthesis has attracted considerable interest. In general, the organocatalyzed synthesis involves cascade ...
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Bottom up Synthesis of Novel Supported Thioureas and Their Use in Enantioselective Solvent free Aza Henry and Michael Additions
... The support of proline derivatives on different solid materials has been extensively developed, but other privileged catalysts, such as bifunctional thioureas, have attracted less attention. The most ...
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Chiral Ureas and Thioureas Supported on Polystyrene for Enantioselective Aza Henry Reaction in Solvent free conditions
... chiral bifunctional thioureas derived from trans-1,2-cyclohexane diamine have been successfully used as organocatalysts in the enantioselective addition of nitromethane to N-phosphinoylimines 5 and N-Boc ...
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N-terminal amino acid sequences of chloroform/methanol-soluble proteins and albumins from endosperms of wheat, barley and related species: Homology with inhibitors of α-amylase and trypsin and with 2 S storage globulins
... Within this región CM3 of wheat has 13 out of 16 residues in common with CMd of barley, 9 with the millet bifunctional and wheat 0.19 a-amylase inhibitors but only four and three wit[r] ...
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In Vitro Stability of C-NETA Radiolabeled with 2056
... the bifunctional ligands C-DOTA and C-NETA (10 µL, 10 mM) was added into their respective sample cells; kinetics spectra were collected every 30 s at 652 nm for 1 ...
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Characterization of four bifunctional plant IAM/PAM-amidohydrolases capable of contributing to auxin biosynthesis.
... To investigate the distribution of AMI1-like proteins in the plant kingdom, the Arabidopsis IAM-hydrolase (AtAMI1, At1g08980) nucleic acid sequence, as well as the tran[r] ...
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A disposable electrochemical sensor based on bifunctional periodic mesoporous organosilica for the determination of lead in drinking waters
... new bifunctional disulfide- and tetrasulfide-bridged periodic mesoporous organosilica (PMO) with mercaptothiazoline ligand was synthesized and employed to prepare chemically modified carbon paste electrodes for ...
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Bifunctional nanocomposites: surface modification of reactive matrices with functional metal nanoparticles by intermatrix synthesis technique
... materials such as, for example FIBAN K-4.18,19 The surface of these materials can be easily modified with metal nanoparticles MNPs as it has been shown in our recent publications.20,21 T[r] ...
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Conversion of cellulosic biomass towards added value products over bifunctional
... explanation, bifunctional acid/redox catalysts are required for this purpose, where hydrolysis and dehydration processes are carried out on solid acid sites and dehydrogenation/hydrogenation on active metal sites ...
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Detection and identification of explosives by surface enhanced Raman scattering
... A large variety of SERS active substrates were tested for ClO4- detection by this group including AgNPs [82], selective bifunctional anion-exchange resins consisting of quaternary ammoni[r] ...
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Ant colony optimization for predicting gene interactions from expression data
... Tryptophan synthase involved in tryptophan biosynthesis, regulated by the general control system of amino acid biosynthesis Bifunctional carbamoylphosphate synthetase CPSase-aspartate tr[r] ...
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Título1,4,7‐triazacyclononane‐based bifunctional picolinate ligands for efficient copper complexation
... Recently, we described the tacn‐based ligand Hno1pa2py, which contains two picolyl and one carboxypicolyl pendant arms for complexation with Cu 2+ cations. [9] This complex exhibited fast complexation kinetics, high ...
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Biodegradable Chitosan Derived Thioureas as Recoverable Supported Organocatalysts – Application to the Stereoselective Aza Henry Reaction
... The level of stereoselection was only moderate for the reaction of the parent benzaldimine (24a) with nitroethane (25b), leading to 26ab in 89:11 er and 78:22 dr. Much better results were obtained when nitropropane (25c) ...
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Analysis of mitotic recombination induced by several mono- and bifunctional alkylating agents in the Drosophila wing-spot test
... The spot size distributions for acute treatments are characterized by a larger average clone size than those for chronic treatments (see Tables 1 and 2). the ana[r] ...
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