アクアミリンアルカロイドピクリニンの全合成
Joel M Smith1, Jesus Moreno, Ben W Boal
1Department of Chemistry and Biochemistry, University of California , Los Angeles, California 90095, United States.
Journal of the American Chemical Society
|March 7, 2014
まとめ
研究者は,複雑なアクアミリンアルカロイドピクリニンの最初の完全合成を達成しました. このブレークスルーには,フィッシャー・インドリゼーションのような重要なステップが含まれており,関連するストリクトアミンアルカロイドへのアクセスを可能にしました.
科学分野:
- 有機化学 オーガニック・ケミストリー
- 自然製品合成 自然製品の合成
- 薬用化学 薬用化学について
背景:
- ピクリニンを含むアクアミリンアルカロイドは,潜在的な生物学的活動を持つ複雑な天然製品です.
- ピクリニンは50年近く前に初めて分離され,その化学合成における長年の課題を明らかにした.
- ピクリニンの複雑な構造は,重要な合成のハードルを提示します.
研究 の 目的:
- 複雑なアクアミリンアルカロイドピクリニンの最初の完全合成を報告する.
- ピクリニンの枠組みを構築するための効率的で簡潔な合成戦略を開発する.
- ピクリニンおよび関連する化合物の生物学的性質および潜在的な応用に関するさらなる研究を可能にするために.
主な方法:
- [3.3.1]-アザビサイクリックコア構造の簡潔な組み立て.
- 自然製品の炭素枠組を確立するために,重要なフィッシャー・インドリゼーション反応の利用.
- ピクリニンの最終的な構築のために,繊細な後期変容の適用.
主要な成果:
- ピクリニンの最初の完全合成が成功しました.
- 合成経路は,この挑戦的な天然製品にアクセスするための信頼できる方法を提供します.
- この合成は,関連する多循環性アルカロイドストリクトアミンの正式な合成でもある.
結論:
- 開発された合成戦略は,ピクリニンおよび関連するアクアミリンアルカロイドへの実行可能な経路を提供します.
- この合成は,これらの複雑な分子の薬理学的可能性を調査するための道を開きます.
- この方法論は,他の構造的に関連した天然製品の合成にも適用できます.
関連する概念動画
Preparation of Amines: Reductive Amination of Aldehydes and Ketones
3.2K
Carbonyl compounds and primary amines undergo reductive amination first to produce imines, followed by secondary amines in the same reaction mixture, using selective reducing agents like sodium cyanoborohydride or sodium triacetoxyborohydride. Reductive amination produces different degrees of substitution of amines depending on the starting amine substrate.
3.2K
Cholinergic Antagonists: Chemistry and Structure-Activity Relationship
3.2K
Cholinergic antagonists bind to cholinergic receptors and limit the effects of acetylcholine and other cholinergic agonists. Based on the specific cholinergic receptor affinity, these antagonists are classified as muscarinic or nicotinic. Anticholinergics interrupt parasympathetic innervations while sympathetic innervations remain uninterrupted. Muscarinic antagonists are also called 'muscarinic antagonists', 'antimuscarinics', or 'parasympatholytics'. Nicotinic...
3.2K
Aldehydes and Ketones with Amines: Imine Formation Mechanism
7.6K
Imine formation involves the addition of carbonyl compounds to a primary amine. It begins with the generation of carbinolamine through a series of steps involving an initial nucleophilic attack and then several proton transfer reactions. The second part includes the elimination of water, as a leaving group, to give the imine.
Imines are formed under mildly acidic conditions. A pH of 4.5 is ideal for the reaction.
If the pH is low or the solution is too acidic, the reaction slows down in the...
Imines are formed under mildly acidic conditions. A pH of 4.5 is ideal for the reaction.
If the pH is low or the solution is too acidic, the reaction slows down in the...
7.6K
Amines: Introduction
4.8K
Amines are organic derivatives of ammonia. They are formed by replacing one or more ammonia protons with alkyl or aryl groups. Depending upon the number of organyl groups bonded to nitrogen, amines are classified as primary, secondary, or tertiary. Primary amines have one organyl group attached to the nitrogen atom, while secondary and tertiary amines have two and three organyl groups attached to the nitrogen atom, respectively.
4.8K
Direct-Acting Cholinergic Agonists: Chemistry and Structure-Activity Relationship
2.3K
Cholinergic agonists or cholinomimetics mimic the action of acetylcholine to stimulate the parasympathetic nervous system. They are categorized into direct-acting and indirect-acting agents. The direct-acting cholinergic drugs induce the parasympathetic response by directly binding to the muscarinic or nicotine receptors. In comparison, the indirect-acting cholinergic drugs prevent acetylcholine hydrolysis, indirectly contributing to the extended parasympathetic response.
The direct-acting...
The direct-acting...
2.3K
Preparation of Amines: Alkylation of Ammonia and Amines
3.9K
Alkylation is one of the methods used to prepare amines. Direct alkylation of ammonia or a primary amine with an alkyl halide gives polyalkylated amines along with a quaternary ammonium salt through successive SN2 reactions. This process of making the quaternary salt through the direct alkylation method is called exhaustive alkylation.
Each alkylation step makes the nitrogen center more nucleophilic, which triggers successive alkylations until a quaternary ammonium salt is formed. Considering...
Each alkylation step makes the nitrogen center more nucleophilic, which triggers successive alkylations until a quaternary ammonium salt is formed. Considering...
3.9K


