Photoinduced
<scp>
FeCl
<sub>3</sub>
‐Catalyzed
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Alkyl Aromatics Oxidation toward Degradation of Polystyrene at Room Temperature
<sup>†</sup>
作者:Guoxiang Zhang、Zongnan Zhang、Rong Zeng
DOI:10.1002/cjoc.202100420
日期:2021.12
synthetic plastic, the subsequently selectivedegradation is still very challenging and highly required. Herein, we disclose a highly practical and selective reaction for the catalytically efficient oxidation of alkyl aromatics (including 1°, 2°, and 3° alkyl aromatics) to carboxylic acids. While dioxygen was used as the sole terminal oxidant, this protocol was catalyzed by the inexpensive and readily available
Cerium(IV) Carboxylate Photocatalyst for Catalytic Radical Formation from Carboxylic Acids: Decarboxylative Oxygenation of Aliphatic Carboxylic Acids and Lactonization of Aromatic Carboxylic Acids
generated by mixing the precursor Ce(OtBu)4 with the corresponding carboxylicacids served as efficient photocatalysts for the direct formation of carboxyl radicals fromcarboxylicacids under blue light-emitting diodes (blue LEDs) irradiation and air, resulting in catalytic decarboxylative oxygenation of aliphatic carboxylicacids to give C-O bond-forming products such as aldehydes and ketones. Control
An indium(0)-metal-mediated efficient synthesis of benzylic hydroperoxides is described. The reaction proceeds efficiently with a broad range of benzyl bromides under aerobic conditions at room temperature to afford benzyl hydroperoxides in good to excellent yields. In addition, the tandem hydroperoxidation-Michael addition of (E)-1-(bromomethyl)-2-(2-nitrovinyl)benzene was also demonstrated.
Chemoselective Decarboxylative Oxygenation of Carboxylic Acids To Access Ketones, Aldehydes, and Peroxides
作者:Renpeng Guan、Guanhong Chen、Elliot L. Bennett、Zhiliang Huang、Jianliang Xiao
DOI:10.1021/acs.orglett.3c00649
日期:2023.4.14
Reported here is a photocatalytic strategy for the chemoselective decarboxylative oxygenation of carboxylicacids using Ce(III) catalysts and O2 as the oxidant. By simply changing the base employed, we demonstrate that the selectivity of the reaction can be channeled to favor hydroperoxides or carbonyls, with each class of products obtained in good to excellent yields and high selectivity. Notably
此处报道的是一种使用 Ce(III) 催化剂和 O 2作为氧化剂的羧酸化学选择性脱羧氧化的光催化策略。通过简单地改变所用的碱,我们证明反应的选择性可以引导到有利于氢过氧化物或羰基化合物,每一类产品都以良好到极好的收率和高选择性获得。值得注意的是,有价值的酮、醛和过氧化物是直接从容易获得的羧酸中生产出来的,无需额外的步骤。