Highly Stereoselective Epoxidation with H2O2 Catalyzed by Electron-Rich Aminopyridine Manganese Catalysts

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• 作者：Olaf Cuss贸 ; Isaac Garcia-Bosch ; David Font ; Xavi Ribas ; Julio Lloret-Fillol ; Miquel Costas
• 刊名：Organic Letters
• 出版年：2013
• 出版时间：December 20, 2013
• 年：2013
• 卷：15
• 期：24
• 页码：6158-6161
• 全文大小：243K
• 年卷期：v.15,no.24(December 20, 2013)
• ISSN：1523-7052

文摘

Fast, efficient, and highly stereoselective epoxidation with H₂O₂ is reached by manganese coordination complexes with e-rich aminopyridine tetradentate ligands. It is shown that the electronic properties of these catalysts vary systematically with the stereoselectivity of the O-atom transfer event and exert fine control over the activation of hydrogen peroxide, reducing the amount of carboxylic acid co-catalyst necessary for efficient operation.