関連する実験動画

Updated: Feb 7, 2026

Enzymatic Cascade Reactions for the Synthesis of Chiral Amino Alcohols from L-lysine

Enzymatic Cascade Reactions for the Synthesis of Chiral Amino Alcohols from L-lysine

Published on: February 16, 2018

キラル・サイクロヘキシル・フューズド・スピロビンドン: 実践的な合成,リガンド開発,非対称な触媒

Zhiyao Zheng¹, Yuxi Cao^1,2, Qinglei Chong^1,3

¹State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis , Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences , 345 Lingling Road , Shanghai 200032 , China.

Journal of the American Chemical Society

|July 24, 2018

まとめ

サイクロヘキシル結合のスパイロビンダンの新しい,容易なエナンチオセレクティブ合成は,新しいキラルリガンドへのアクセスを提供します. これらのリガンドは非対称な触媒で優れた性能を示し,確立された特権リガンドに匹敵する.

科学分野:

有機化学
非対称な触媒
リガンド設計

背景:

1,1'-スピロビンダンは,キラルリガンド開発のための特権的な支架です.
エナチオピュア・スピロビンダンの合成のための既存の方法は,実用的な応用を制限し,退屈です.

研究の目的:

サイクロヘキシル結合のスパイロビンダンの容易かつスケーラブルな合成を開発する.
これらのスパイロビンドンから派生した新型のキラルリガンドを合成する.
これらの新しいリガンドの触媒性能を非対称反応で評価する.

主な方法:

α,α'-bis (アリデン) ケトンのイール触媒化非対称化.
水素化キラルケトンのTiCl4-促進された非対称なスパイロアニュレーション.
単一ポット,スケーラブル合成とリン酸ミド酸とリン酸アミドピリジンリガンドへの誘導.

主要な成果:

サイクロヘキシル溶融のスパイロビンダンの高収量と優れたステレオ選択性 (>99% ee) を達成した.
重要な中間物質の25gスケールの生産で示されたスケーラブルな合成.
派生リガンドは,水素化,水酸化, [2+2] 反応における既定のスピロビンダンのリガンドと比べて優れた触媒活性を示した.

結論:

サイクロヘキシル融合型脊髄細胞への実用的で拡張可能な経路が確立されています.
この基板から派生した新型のキラルリガンドは,様々な非対称な変換で高い触媒効率を示します.
この研究は,触媒と機能的分子開発における容易にアクセス可能なスピロビンダンの派生物のより広範な応用を促進します.

さらに関連する動画

Preparation of Enantiopure Non-Activated Aziridines and Synthesis of Biemamide B, D, and epiallo-Isomuscarine

Preparation of Enantiopure Non-Activated Aziridines and Synthesis of Biemamide B, D, and epiallo-Isomuscarine

Published on: June 13, 2022

Synthesis of Ligand-free CdS Nanoparticles within a Sulfur Copolymer Matrix

Synthesis of Ligand-free CdS Nanoparticles within a Sulfur Copolymer Matrix

Published on: May 1, 2016

関連する概念動画

Catalysis

Catalysis

The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.

Ligand Binding and Linkage

Ligand Binding and Linkage

Allosteric proteins have more than one ligand binding site; the binding of a ligand to any of these sites influences the binding of ligands to the other sites. When a protein is allosteric, its binding sites are called coupled or linked. In the case of enzymes, the site that binds to the substrate is known as the active site and the other site is known as the regulatory site. When a ligand binds to the regulatory site, this leads to conformational changes in the protein that can influence...

Chirality

Chirality

Chirality is a term that describes the lack of mirror symmetry in an object. In other words, chiral objects cannot be superposed on their mirror images. For example, our feet are chiral, as the mirror image of the left foot, the right foot, cannot be superposed on the left foot.
Chiral objects exhibit a sense of handedness when they interact with another chiral object. For example, our left foot can only fit in the left shoe and not in the right shoe. Achiral objects — objects that have...

Reclosers and Fuses

Reclosers and Fuses

Automatic circuit reclosers enhance the protection of distribution circuits by interrupting and auto-reclosing an AC circuit according to a preset sequence. They effectively manage temporary faults on overhead distribution lines, often caused by tree limbs or wildlife, by briefly disrupting service to improve overall reliability. However, contact with reclosers or energized broken conductors on the ground can pose serious hazards.
A comprehensive protection scheme for radial distribution...

Chirality in Nature

Chirality in Nature

Chirality is the most intriguing yet essential facet of nature, governing life’s biochemical processes and precision. It can be observed from a snail shell pattern in a macroscopic world to an amino acid, the minutest building block of life. Most of the snails around the world have right-coiled shells because of the intrinsic chirality in their genes. All the amino acids present in the human body exist in an enantiomerically pure state, except for glycine - the sole achiral amino acid.

Ligand Binding Sites

Ligand Binding Sites

Proteins are dynamic macromolecules that carry out a wide variety of essential processes; however, the activities of most proteins depend on their interactions with other molecules or ions, known as ligands.
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...