(-) -ラウリマリドの合成総量
Paul A Wender1, Sayee G Hegde, Robert D Hubbard
1Department of Chemistry, Stanford University, Stanford, California 94305-5080, USA. wenderp@stanford.edu
Journal of the American Chemical Society
|May 2, 2002
まとめ
研究者らは,チューブリンポリメリゼーションを阻害し,アポトーシスを誘発する海洋由来化合物である (-) - ラウリマリドを合成した. この効率的な合成は,ラウリマリドおよび関連する薬物アナログへの新しい経路を提供します.
科学分野:
- 海洋自然産物化学 海洋自然産物化学
- 有機合成による有機合成です.
- 化学生物学 化学生物学とは
背景:
- (-) - ラウリマリドは,海洋スポンジからの新しいマクロリドです.
- 異常なチューブリンポリメリゼーションとアポトーシスを促進することにより,強力な抗がん活性を示します.
- その作用はTaxolと類似しており,多剤耐性を克服する潜在的利点があります.
研究 の 目的:
- (-) -ラウリマリドの柔軟かつ収束する非対称合成を開発する.
- ラウリマリドとその類似物を生産するための効率的な経路を確立し,さらなる研究のために使用する.
主な方法:
- 合成は,ダイアステレオセレクティブサクラライ反応を用いた.
- 保護されていない近隣ダイオルの地域選択的なマクロラクトニゼーションが重要なステップでした.
- 全体的な合成には25のステップ (最も長い線形) と全体として36のステップが含まれていました.
主要な成果:
- (-) -ラウリマリドの合成が成功しました.
- 合成により3.5%の総収量を達成した.
- この経路は特に短く効率的で,アナログ合成を容易にする.
結論:
- 新しく効率的な (-) - ラウリマリドの非対称合成が確立されました.
- この合成経路は,ラウリマリドおよびその類似剤へのアクセスを提供し,その治療的可能性を調査する上で極めて重要です.
- この合成は,サクラライ反応や複雑な分子構造のためのマクロラクトニゼーションのような重要な反応を強調しています.
関連する概念動画
Long-term Depression
Long-term depression, or LTD, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTD is the process of synaptic weakening that occurs over time between pre and postsynaptic neuronal connections. The synaptic weakening of LTD works in opposition to synaptic strengthening by long-term potentiation (LTP) and together are the main mechanisms that underlie learning and memory.
Combined Effects of Drugs: Antagonism
The combined effects of drugs can result in various interactions, of which an important type is antagonism. Antagonism is a mechanism where one drug inhibits or counteracts the effects of another drug. Antagonism can occur through various means, including receptor binding, allosteric modulation, functional interaction, chemical reactions, and pharmacokinetic processes.
The most common type is receptor antagonism, where one drug acts as an antagonist to block the effects of another drug by...
The most common type is receptor antagonism, where one drug acts as an antagonist to block the effects of another drug by...
Combined Effects of Drugs: Synergism
Synergism is a useful mechanism where combining two or more drugs is more effective than each constituent used alone. Such combinations are also called supra-additive interactions. The drugs collectively enhance the final therapeutic effect by acting on different targets. Another advantage is that the low dose of each constituent drug is sufficient to achieve the desired effect. This helps reduce the duration of therapy and lower the adverse effects of these drugs.
Such synergistic combinations...
Such synergistic combinations...
Surface Active Agents
Surfactants, named for their behavior at interfaces, positively adsorb at the interfaces of two phases, reducing interfacial tension. Their versatility as emulsifiers, detergents, and foaming agents stems from this ability. Surfactants, often termed amphiphiles, share the property of amphipathy, with molecules having both hydrophilic and hydrophobic portions. The hydrophilic part is called the head, and the hydrophobic part, including an elongated alkyl substituent, forms the tail.Surfactants...
Agonism and Antagonism: Quantification
When drugs are administered, they can elicit either an agonist or antagonist effect on the body. Agonism occurs when a drug activates a specific receptor, triggering a biological response. On the other hand, antagonism happens when a drug binds to the same receptors but blocks their activation, thereby preventing a biological response.
To quantify these effects, researchers use a dose-response curve, which provides valuable information about the potency and efficacy of a drug. Potency refers to...
To quantify these effects, researchers use a dose-response curve, which provides valuable information about the potency and efficacy of a drug. Potency refers to...
Formation of Lipopolysaccharides
Lipopolysaccharides (LPS) are crucial components of the outer membrane of Gram-negative bacteria, serving both structural and functional roles. It contributes to membrane stability and protects bacteria from host immune responses. LPS is composed of three major regions—lipid A, a core oligosaccharide, and an O antigen. The biosynthesis and assembly of LPS involve a highly coordinated set of enzymatic reactions and transport mechanisms. Additionally, LPS is recognized as an endotoxin, triggering...


