A novel intramolecular hydrogen bonding between a side-chain pyridine ring and an amide hydrogen of the peptide backbone in tripeptides containing the new amino acid, α,α-di(2-pyridyl)glycine
摘要:
通过改进的 Ugi 反应合成了四种含有新型氨基酸α,α-二(2-吡啶基)甘氨酸(2Dpy)的三肽(Z-AA1-2Dpy-AA3-OMe;AA1, AA3 = Gly, Aib)。核磁共振分析清楚地表明,除 AA1、AA3 = Aib 的肽外,含 2Dpy 的三肽采用了一种独特的构象,在 2Dpy-NH 与一个吡啶氮之间以及 AA3-NH 与另一个吡啶氮之间有两个分子内氢键。这种构象迄今尚未见报道。另一方面,肽 Z-Aib-2Dpy-Aib-OMe 很可能采用δ-匝结构,该结构通过 2Dpy-NH 与一个吡啶氮之间以及 AA3-NH 与 Z 基团的 CO 之间的两个分子内氢键来稳定。
A novel intramolecular hydrogen bonding between a side-chain pyridine ring and an amide hydrogen of the peptide backbone in tripeptides containing the new amino acid, α,α-di(2-pyridyl)glycine
摘要:
通过改进的 Ugi 反应合成了四种含有新型氨基酸α,α-二(2-吡啶基)甘氨酸(2Dpy)的三肽(Z-AA1-2Dpy-AA3-OMe;AA1, AA3 = Gly, Aib)。核磁共振分析清楚地表明,除 AA1、AA3 = Aib 的肽外,含 2Dpy 的三肽采用了一种独特的构象,在 2Dpy-NH 与一个吡啶氮之间以及 AA3-NH 与另一个吡啶氮之间有两个分子内氢键。这种构象迄今尚未见报道。另一方面,肽 Z-Aib-2Dpy-Aib-OMe 很可能采用δ-匝结构,该结构通过 2Dpy-NH 与一个吡啶氮之间以及 AA3-NH 与 Z 基团的 CO 之间的两个分子内氢键来稳定。
[EN] DESFERRIOXAMINE CONJUGATES, DERIVATIVES AND ANALOGUES<br/>[FR] CONJUGUÉS DE LA DESFERRIOXAMINE, DÉRIVÉS ET ANALOGUES
申请人:UNIV SYDNEY
公开号:WO2009055863A1
公开(公告)日:2009-05-07
The present invention relates to desferoxamine conjugates, derivatives and analogues thereof. In particular, the present invention relates to desferoxamine conjugates, analogues and derivatives thereof, and methods for reducing levels of metals, especially iron, in a mammal. Uses of the compounds according to the invention are also provided. Compounds of the present invention may also be used to treat iron dyshomeostasis disorders, cancer, malaria and fungal infections. The compounds of the invention may be formulated into a pharmaceutical composition or packaged into kits.
[EN] FIVE-MEMBERED RING-SUBSTITUTED PYRIDAZINOL COMPOUND AND DERIVATIVES THEREOF, PREPARATION METHOD, HERBICIDAL COMPOSITION, AND APPLICATION<br/>[FR] COMPOSÉ DE PYRIDAZINOL SUBSTITUÉ PAR UN CYCLE À CINQ CHAÎNONS ET SES DÉRIVÉS, PROCÉDÉ DE PRÉPARATION, COMPOSITION HERBICIDE ET APPLICATION<br/>[ZH] 五元环取代的哒嗪醇类化合物及其衍生物、制备方法、除草组合物和应用
[EN] PYRIDAZINOL COMPOUND, DERIVATIVE THEREOF, PREPARATION METHOD THEREFOR, HERBICIDAL COMPOSITION AND USE THEREOF<br/>[FR] COMPOSÉ DE PYRIDAZINOL, DÉRIVÉ DE CELUI-CI, PROCÉDÉ DE PRÉPARATION CORRESPONDANT, COMPOSITION HERBICIDE ET UTILISATION ASSOCIÉES<br/>[ZH] 一种哒嗪醇类化合物及其衍生物、制备方法、除草组合物和应用