Highly Efficient Recognition of Native TpT by Artificial Ditopic Hydrogen-Bonding Receptors Possessing a Conformationally Well-Defined Linkage
作者:Masayoshi Takase、Masahiko Inouye
DOI:10.1021/jo0264473
日期:2003.2.1
Synthesis and binding affinity of rationally designed artificialditopic nucleobase receptors are reported. The ditopicreceptors were designed to recognize thymine-thymine dinucleotides by their two hydrogen-bonding moieties, which are connected to conformationally well-defined linkages such as ferrocene and biphenylene. The ditopicreceptors exhibited a remarkably strong binding affinity for lipophilic
Adducts thermotropes à partir d'espèces non mésogènes liées par liaisons hydrogène et leur procédé de préparation
申请人:RHONE-POULENC CHIMIE
公开号:EP0434576A1
公开(公告)日:1991-06-26
La présente invention concerne des adducts thermotropes répondant
représente un groupe formant au moins deux liaisons hydrogène avec le groupe fonctionnel complémentaire représenté par le symbole Σ; A et B représentent des substitutions appropriées, portées par les groupes fonctionnels Σ et Σ, qui contribuent en combinaison avec la structure du motif central Σ --- Σ à induire la propriété thermotrope; p et q = 1 ou 2. Le motif central Σ --- Σ dérive notamment des couples complémentaires: cytosine/isocytosine, guanine/cytosine, adénine/uracil, dialkanamido-2,6 pyridine/uracil, dialkanamido-2,6 pyridine/thymine. Les substituants A et B sont notamment de longues chaînes aliphatiques hydrocarbonées, pouvant renfermer un ou plusieurs hétéroatomes, qui sont ramifiées et possèdent au moins 28 atomes.
本发明涉及响应信息请求的热致加合物。
代表与符号 Σ 所代表的互补官能团形成至少两个氢键的基团;A 和 B 代表由官能团 Σ 和 Σ 所携带的合适的取代基,它们与中心单元 Σ --- Σ 的结构相结合,有助于诱导热致性;p 和 q = 1 或 2。中心Σ---Σ单元主要来自互补对:胞嘧啶/异胞嘧啶、鸟嘌呤/胞嘧啶、腺嘌呤/尿嘧啶、二烷氨基-2,6 吡啶/尿嘧啶、二烷氨基-2,6 吡啶/胸腺嘧啶。取代基 A 和 B 尤其是长的脂肪族烃链,其中可能含有一个或多个杂原子,这些烃链是支链的,至少有 28 个原子。
Artificial allosteric receptors for nucleotide bases and alkali-metal cations
作者:Masahiko Inouye、Takashi Konishi、Kakuzo Isagawa
DOI:10.1021/ja00071a021
日期:1993.9
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.
Ferrocene-Modified Artificial Ditopic Nucleobase Receptors Capable of Serving Both Hydrogen-Bonding and π-Stacking Interactions
作者:Masahiko Inouye、Masa-aki S. Itoh、Hiroyuki Nakazumi
DOI:10.1021/jo990716g
日期:1999.12.1
Ferrocene-modified artificial ditopic nucleobase receptors were designed and synthesized. The ditopic receptors possess two hydrogen-bonding and one pi-stacking interaction sites that act simultaneously for the binding to 1-butylthymine utilizing the pivot character of the ferrocene skeleton. Diamidopyridine was chosen for the hydrogen-bonding moiety, and 2,7-disubstituted pyrene was used for pi-stacking one. The ditopic receptors bound 1-butylthymine, and the stoichiometry for the complexation was found to be 1:2 in CDCl3. In the H-1 NMR spectrum of the mixture for the receptors and 1-butylthymine, large downfield shifts of the NH protons on both diamidopyridine and 1-butylthymine revealed the complementary hydrogen bonds between them, while upfield shifts were observed for CH protons of the pyrene and the thymine nuclei reflecting from the close approach of the bound 1-butylthymine to the pyrene. Binding affinities of the ditopic receptors for 1-butylthymine were discussed on the basis of the total association constants.