Artificial allosteric receptors for nucleotide bases and alkali-metal cations
摘要:
New allosteric thymine receptors, 2,6-diamidopyridine derivatives tethered to an anthracene ring by a polyoxyethylene chain, were synthesized. In these receptors, binding of 1-butylthymine was enhanced by a factor of 4-6 by recognition of sodium cations, and the changes in the electron density of the anthracene ring were found to have influence on the allosterism by through-space interaction. The anthracene-linked diamidopyridines represent a rationally designed new class of artificial allosteric receptors.
Magnetic substance and magnetic substance manufacturing method
申请人:IHI Corporation
公开号:US09779862B2
公开(公告)日:2017-10-03
[object] A magnetization technique that enhances magnetic properties of an organic compound is provided without damaging properties of the organic compound or while maintaining the structure of the organic compound.
[solution] The present disclosure is a method for manufacturing a magnetic substance composed of crystals of a magnetization target compound and an electron acceptor by combining the magnetization target compound with the electron acceptor; forming a solution by dissolving a mixture of the magnetization target compound and the electron acceptor in a solvent; maintaining the solution in a very low temperature state and allowing the solution to deposit the crystals of the magnetic target compound and the electron acceptor; and separating the crystals from the solvent.
Reactions of copper(II) halides with aromatic compounds—XI
作者:J.M. Mancilla、D.C. Nonhebel、J.A. Russell
DOI:10.1016/0040-4020(75)80155-4
日期:1975.1
9-Alkyl and 9-arylanthracenes react with copper(II) bromide in methanol to give 10-alkyl (or aryl)-10-methoxyanthrones as the major product. 9-Methylanthracene additionally affords 10-methoxy-10-methoxymethylanthrone. The formation of all these products can be interpreted in terms of an initial electron-transfer oxidation of the aromatic moiety to the radical cation.
reaction between the folded and twisted isomers. With increasing the polarity of the solvent, 2 showed an isomerization reaction from the folded form to the twisted form. The stabilization of the twisted isomer in polar solvents can be interpreted as proof of its relatively large zwitterionic character. The DMF solution of 2 displayed paramagnetically‐broadened NMR signals from the thermally populated triplet