Cerium(IV) Carboxylate Photocatalyst for Catalytic Radical Formation from Carboxylic Acids: Decarboxylative Oxygenation of Aliphatic Carboxylic Acids and Lactonization of Aromatic Carboxylic Acids
作者:Satoru Shirase、Sota Tamaki、Koichi Shinohara、Keishi Hirosawa、Hayato Tsurugi、Tetsuya Satoh、Kazushi Mashima
DOI:10.1021/jacs.9b12918
日期:2020.3.25
generated by mixing the precursor Ce(OtBu)4 with the corresponding carboxylic acids served as efficient photocatalysts for the direct formation of carboxyl radicals from carboxylic acids under blue light-emitting diodes (blue LEDs) irradiation and air, resulting in catalytic decarboxylative oxygenation of aliphatic carboxylic acids to give C-O bond-forming products such as aldehydes and ketones. Control
我们发现,通过将前体 Ce(OtBu)4 与相应的羧酸混合产生的原位生成的羧酸铈 (IV) 作为有效的光催化剂,在蓝色发光二极管(蓝色 LED)下直接由羧酸形成羧基。 ) 辐照和空气,导致脂肪族羧酸的催化脱羧氧化,得到形成 CO 键的产物,如醛和酮。对照实验表明,六核 Ce(IV) 羧酸盐簇最初在反应混合物中形成,Ce(IV) 羧酸盐簇的配体-金属电荷转移性质是将羧酸盐配体转化为羧基的高催化性能的原因激进的。此外,