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リガンドと基板は,Regio-とステレオセレクティブRu (II) -Vinylicエステルへのヒドロアシロキシレーションを触媒化

Paul A Beasley¹, Frank E McDonald¹

¹Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States of America.

Advanced synthesis & catalysis

|August 26, 2025

まとめ

2つのルテニウム (II) 触媒システムは,末端アルキンのアンチマルコフニコフ領域選択性水酸化を可能にします. 異なるルテニウム複合体は選択的に (E) -または (Z) -ビニルエステル同位体を生成する.

科学分野:

有機金属化学
有機合成

背景:

アルキンの水酸化は,ビニルエステルを合成するための重要な変換である.
アルキンの機能化における地域選択性とステレオ選択性の制御は,有機合成における重要な課題である.

研究の目的:

終端アルキンのアンチマルコフニコフ・地域選択性水酸化のための新しいルテニウム (II) 触媒システムを開発する.
(E) 及び (Z) ヴィニルエステルのステレオ選択的合成を達成する.

主な方法:

異なる2つのルテニウム ((II) 触媒システム: [Ru ((NCCH3) [6] [ ((BF4) 2 ]と,電子を取り除くリガンドを持つルテニウム・スコーピオネート複合体を使用した.
開発された触媒条件下で,様々な炭酸と末端アルキンの反応を調査した.

主要な成果:

[Ru ((NCCH3) 6)) [ ((BF4) 2)) システムは,アリラセチレンと選択カルボキシル酸を使用する際に, (E) -ビニルエステルに対する高い選択性を示した.
ルテニウムスコーピオネート複合体は選択的に (Z) - ビニルエステルイソマーを生成した.

結論:

抗マルコフニコフ水酸化によるビニルエステルのステレオ選択合成のための2つの補完的なルテニウム (II) 触媒システムを開発した.
ルテニウム触媒の賢明な選択によって,ステレオ化学的結果 ((E) または (Z) 同位体) を制御する能力を示した.

キーワード:

アルキン炭酸酸ルテニウム三脚連鎖体ヴィニリデンリガンド

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