キラルα-アミノフォスフォナートの実用合成 弱結合有機触媒 ppm 負荷
Jiaxiang Lu1, Yang Yu1, Zhenghua Li1
1Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, Department of Chemistry, School of Science and Research Center for Industries of the Future, Westlake University, Hangzhou 310030, China.
Journal of the American Chemical Society
|May 19, 2024
まとめ
新しい有機触媒は,α-イミノフォスフォナートの高度なエナチオ選択性イソメリゼーションを可能にし,驚くべき回転数とバイオイソステル合成のための低触媒負荷で酵素のような効率を達成します.
科学分野:
- 有機化学
- キャタリシス
- 薬剤化学
背景:
- α-アミノフォスフォン酸は,重要な生物学的活動を持つα-アミノ酸のバイオイソステルである.
- これらの化合物を合成するための効率的な触媒方法の開発は 薬の発見と開発に不可欠です
研究 の 目的:
- α-イミノフォスフォナートのイソメリゼーションのための高度なエナンチオセレクティブの有機触媒を開発する.
- 開発された有機触媒の触媒効率とメカニズムを調査する.
主な方法:
- 非対称な触媒のための新しい有機触媒の開発.
- さまざまなα-アルキルイミノフォスフォナートのエナンチオセレクティブイソメリゼーション反応.
- ターンオーバー数 (TON) とエナティオメール過量 (ee) を含む触媒性能の決定
- 触媒メカニズムの解明のための計算研究
主要な成果:
- この有機触媒は,広範囲の基板に対して 20,000 トンから 1,000,000 トンまでの非凡な効率性を示した.
- >93%のエナチオメール過量 (ee) を含む完全な反応は,百万分の1 (ppm) の触媒負荷でも観察された.
- 計算分析により,サブストラット-触媒の前組織化を促進する弱い結合相互作用を通じて,酵素のような触媒活性が明らかになった.
結論:
- 開発された有機触媒は,高効率の小分子イソメラーゼとして機能する.
- この触媒は,α-アミノフォスフォン酸誘導体のエナンチオセレクティブ合成のための強力なツールを提供します.
- 医学化学と有機合成における新しい触媒戦略の基礎となる.
さらに関連する動画
関連する概念動画
Preparation of 1° Amines: Gabriel Synthesis
3.5K
Direct alkylation is not a suitable method for synthesizing amines because it produces polyalkylated products. Gabriel synthesis is the most preferred method to exclusively make primary amines. The method uses phthalimide, which contains a protected form of nitrogen that participates in alkylation only once to predominantly give primary amines.
Strong bases like NaOH or KOH deprotonate the phthalimide to form the corresponding anion, which acts as a nucleophile. Further, the anion attacks an...
Strong bases like NaOH or KOH deprotonate the phthalimide to form the corresponding anion, which acts as a nucleophile. Further, the anion attacks an...
3.5K
Preparation of 1° Amines: Azide Synthesis
3.9K
Direct alkylation of ammonia produces polyalkylated amines, along with a quaternary ammonium salt. To exclusively prepare primary amines, the azide synthesis method can be used.
Azide ions act as good nucleophiles and react with unhindered alkyl halides to form alkyl azides. Alkyl azides do not participate in further nucleophilic substitution reactions, thereby eliminating the chances of polyalkylated products. Alkyl azides are reduced by hydride-based reducing agents, like lithium aluminum...
Azide ions act as good nucleophiles and react with unhindered alkyl halides to form alkyl azides. Alkyl azides do not participate in further nucleophilic substitution reactions, thereby eliminating the chances of polyalkylated products. Alkyl azides are reduced by hydride-based reducing agents, like lithium aluminum...
3.9K
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
3.3K
Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
3.3K
Acid Halides to Amides: Aminolysis
2.7K
Aminolysis is a nucleophilic acyl substitution reaction, where ammonia or amines act as nucleophiles to give the substitution product. Acid halides react with ammonia, primary amines, and secondary amines to yield primary, secondary, and tertiary amides, respectively.
In the first step of the aminolysis mechanism, the amine attacks the carbonyl carbon of the acyl chloride to form a tetrahedral intermediate. In the second step, the carbonyl group is re-formed with the elimination of a chloride...
In the first step of the aminolysis mechanism, the amine attacks the carbonyl carbon of the acyl chloride to form a tetrahedral intermediate. In the second step, the carbonyl group is re-formed with the elimination of a chloride...
2.7K
Preparation of 1° Amines: Hofmann and Curtius Rearrangement Mechanism
3.5K
The Hofmann and Curtius rearrangement reactions can be applied to synthesize primary amines from carboxylic acid derivatives such as amides and acyl azides. In the Hofmann rearrangement, a primary amide undergoes deprotonation in the presence of a base, followed by halogenation to generate an N-haloamide. A second proton abstraction produces a stabilized anionic species, which rearranges to an isocyanate intermediate via an alkyl group migration from the carbonyl carbon to the neighboring...
3.5K
Chirality at Nitrogen, Phosphorus, and Sulfur
5.7K
Chirality is most prevalent in carbon-based tetrahedral compounds, but this important facet of molecular symmetry extends to sp3-hybridized nitrogen, phosphorus and sulfur centers, including trivalent molecules with lone pairs. Here, the lone pair behaves as a functional group in addition to the other three substituents to form an analogous tetrahedral center that can be chiral.
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...
5.7K


