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引用次数: 0
摘要
在 427 纳米 LED 的照射下，使用催化量的碱式醋酸铁（III）Fe(OAc)2(OH)，在苯并咪唑的存在下，实现了具有易氧化官能团（如苯酚和吲哚官能团）的羧酸的脱羧烷基化反应。对这一催化反应的动力学分析表明，反应速率在烯烃中为一阶，与光强度呈线性相关；苯并咪唑配位物种的反应速率更快，这与可见光区域吸光度的增加是一致的。与其他铁（III）物种相比，原位生成的氧化桥接铁簇的氧化能力较弱，因此对易氧化基团具有广泛的官能团耐受性。
Decarboxylative Alkylation of Carboxylic Acids with Easily Oxidizable Functional Groups Catalyzed by an Imidazole-Coordinated Fe3 Cluster under Visible Light Irradiation
Decarboxylative alkylation of carboxylic acids with easily oxidizable functional groups such as phenol and indole functionalities was achieved using a catalytic amount of basic iron(III) acetate, Fe(OAc)2(OH), in the presence of benzimidazole under 427 nm LED irradiation. Kinetic analyses of this catalytic reaction revealed that the reaction rate is first-order in alkenes and is linearly correlated with the light intensity; the faster reaction rate for the benzimidazole-ligated species was consistent with the increased absorbance in the visible light region. Wide functional group tolerance for the easily oxidizable groups is ascribed to the weak oxidation ability of the in situ-generated oxo-bridged iron clusters compared with other iron(III) species.
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