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27 Newest Publications about the topic solution
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Spectroscopic characterization of photoaccumulated radical anions: a litmus test to evaluate the efficiency of photoinduced electron transfer (PET) processes
24-04-2013 | Maurizio Fagnoni, Stefano Protti, Davide Ravelli and Angelo Albini, Beilstein Journal of Organic Chemistry, 2013
Abstract Steady-state irradiation in neat acetonitrile of some aromatic nitriles, imides and esters (10−5–10−3 M solution) in the presence of tertiary amines allowed the accumulation of the corresponding radical anions, up to quantitative yield for polysubstituted benzenes and partially ...
Ring opening of 2-aza-3-borabicyclo[2.2.0]hex-5-ene, the Dewar form of 1,2-dihydro-1,2-azaborine: stepwise versus concerted mechanisms
18-04-2013 | Holger F. Bettinger and Otto Hauler, Beilstein Journal of Organic Chemistry, 2013
Abstract The ring opening of the Dewar form of 1,2-dihydro-1,2-azaborine, 2-aza-3-borabicyclo[2.2.0]hex-5-ene (3) is investigated by theoretical methods by using multiconfiguration SCF (CASSCF) and coupled cluster theory [CCSD(T)] with basis sets up to polarised quadruple-zeta quality. The ...
From bead to flask: Synthesis of a complex β-amido-amide for probe-development studies
06-02-2013 | Kevin S. Martin, Cristian Soldi, Kellan N. Candee, Hiromi I. Wettersten, Robert H. Weiss and Jared T. Shaw, Beilstein Journal of Organic Chemistry, 2013
Abstract A concise synthesis of benzimidazole-substituted β-amido-amide LLW62 is presented. The original synthesis of compounds related to LLW62 was developed on Rink resin as part of a “one-bead, one-compound” combinatorial approach for on-bead screening purposes. The current synthesis is ...
Synthesis and testing of the first azobenzene mannobioside as photoswitchable ligand for the bacterial lectin FimH
01-02-2013 | Vijayanand Chandrasekaran, Katharina Kolbe, Femke Beiroth and Thisbe K. Lindhorst, Beilstein Journal of Organic Chemistry, 2013
Abstract In order to allow spatial and temporal control of carbohydrate-specific bacterial adhesion, it has become our goal to synthesise azobenzene mannosides as photoswitchable inhibitors of type 1 fimbriae-mediated adhesion of E. coli. An azobenzene mannobioside 2 was prepared and its ...
Inclusion of the insecticide fenitrothion in dimethylated-β-cyclodextrin: unusual guest disorder in the solid state and efficient retardation of the hydrolysis rate of the complexed guest in alkaline solution
17-01-2013 | Dyanne L. Cruickshank, Natalia M. Rougier, Raquel V. Vico, Susan A. Bourne, Elba I. Buján, Mino R. Caira and Rita H. ..., Beilstein Journal of Organic Chemistry, 2013
Abstract An anhydrous 1:1 crystalline inclusion complex between the organophosphorus insecticide fenitrothion [O,O-dimethyl O-(3-methyl-4-nitrophenyl)phosphorothioate] and the host compound heptakis(2,6-di-O-methyl)-β-cyclodextrin (DIMEB) was prepared and its structure elucidated by ...
Cyclodextrin-induced host–guest effects of classically prepared poly(NIPAM) bearing azo-dye end groups
14-11-2012 | Gero Maatz, Arkadius Maciollek and Helmut Ritter, Beilstein Journal of Organic Chemistry, 2012
Abstract A thermo-, pH- and cyclodextrin- (CD) responsive poly(N-isopropylacrylamide) (PNIPAM), with a N,N-dimethylaminoazobenzene end group was synthesized. Using 3-mercaptopropionic acid as a chain transfer agent, PNIPAM with a well-defined COOH end group was obtained. The acid end group ...
Cyclization of ortho-hydroxycinnamates to coumarins under mild conditions: A nucleophilic organocatalysis approach
26-09-2012 | Florian Boeck, Max Blazejak, Markus R. Anneser and Lukas Hintermann, Beilstein Journal of Organic Chemistry, 2012
Abstract (E)-Alkyl ortho-hydroxycinnamates cyclize to coumarins at elevated temperatures of 140–250 °C. We find that the use of tri-n-butylphosphane (20 mol %) as a nucleophilic organocatalyst in MeOH solution allows cyclization to take place under much milder conditions (60–70 °C). ...
Influence of cyclodextrin on the solubility of a classically prepared 2-vinylcyclopropane macromonomer in aqueous solution
13-09-2012 | Helmut Ritter, Jia Cheng and Monir Tabatabai, Beilstein Journal of Organic Chemistry, 2012
Abstract A macromonomer 5 consisting of a polymerizable vinylcyclopropane end group and a poly(N-isopropylacrylamide) (poly(NiPAAm)) chain was obtained from amidation of 1-ethoxycarbonyl-2-vinylcyclopropane-1-carboxylic acid (4) with an amino-terminated poly(NiPAAm) 3 as an example. This ...
Cyclodextrin nanosponge-sensitized enantiodifferentiating photoisomerization of cyclooctene and 1,3-cyclooctadiene
16-08-2012 | Wenting Liang, Cheng Yang, Masaki Nishijima, Gaku Fukuhara, Tadashi Mori, Andrea Mele, Franca Castiglione, Fabrizio ..., Beilstein Journal of Organic Chemistry, 2012
Abstract Enantiodifferentiating geometrical photoisomerizations of (Z)-cyclooctene and (Z,Z)-1,3-cyclooctadiene were performed by using the pyromellitate-linked cyclodextrin network polymer, termed “cyclodextrin nanosponge (CDNS)”, as a supramolecular sensitizing host. The photochirogenic ...
Partial thioamide scan on the lipopeptaibiotic trichogin GA IV. Effects on folding and bioactivity
24-07-2012 | Marta De Zotti, Barbara Biondi, Cristina Peggion, Matteo De Poli, Haleh Fathi, Simona Oancea, Claudio Toniolo and Fe ..., Beilstein Journal of Organic Chemistry, 2012
Abstract Backbone modification is a common chemical tool to control the conformation of linear peptides and to explore potentially useful effects on their biochemical and biophysical properties. The thioamide, ψ[CS-NH], group is a nearly isosteric structural mimic of the amide (peptide) ...
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