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Updated: Apr 28, 2026

Efficient Construction of Drug-like Bispirocyclic Scaffolds Via Organocatalytic Cycloadditions of α-Imino γ-Lactones and Alkylidene Pyrazolones
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Efficient Construction of Drug-like Bispirocyclic Scaffolds Via Organocatalytic Cycloadditions of α-Imino γ-Lactones and Alkylidene Pyrazolones

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平面型キラル型 (π-アレン) クロミウム基板に基づくフォスフィン・オレフィン・リガンド:設計,合成,非対称触媒の応用

Masamichi Ogasawara1, Ya-Yi Tseng, Sachie Arae

  • 1Catalysis Research Center and Graduate School of Life Science, Hokkaido University , Kita-ku, Sapporo 001-0021, Japan.

Journal of the American Chemical Society
|June 17, 2014
PubMed
まとめ

平面キラルクロミウム複合体は,ロジウム触媒による非対称添加反応における有効リガンドとして作用する. 新しい合成方法により,多様なリガンドの生成が可能になり,化合物3gは,エナチオセレクティブ性および収量において優れた性能を示しています.

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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...
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A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...
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The concept of prochirality leads to the nomenclature of the individual faces of a molecule and plays a crucial role in the enantioselective reaction. It is a concept where two or more achiral molecules react to produce chiral products. A typical process is the reaction of an achiral ketone to generate a chiral alcohol. Here, the achiral reactant reacts with an achiral reducing agent, sodium borohydride, to generate an equimolar mixture of the chiral enantiomers of the product. For example, an...
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