A scalable and efficient electrocatalytic dehydrogenative esterification is reported. With an indirect electrolysis strategy, both intra- and intermolecular-type reactions were amenable to this practical method. With n-Bu4NI as the catalyst, undesired decarboxylation and Baeyer–Villiger oxidation were suppressed. More importantly, this novel method provided reliable and direct access to the natural
We developed efficient aerobic photooxidative oxylactonizations of oxocarboxylic acids promoted by trifluoroacetic anhydride with molecular oxygen as the terminal oxidant in the fluorous solvent FC-72.
Visible-Light-Promoted Metal-Free Aerobic Oxidation of Primary Amines to Acids and Lactones
作者:Xiaokai Cheng、Bo Yang、Xingen Hu、Qing Xu、Zhan Lu
DOI:10.1002/chem.201604440
日期:2016.12.5
A unique metal‐free aerobicoxidation of primary amines via visiblelight photocatalytic double carbon–carbon bonds cleavage and multi carbon–hydrogen bonds oxidation was observed. Aerobicoxidation of primary amines could be controlled to afford acids by using dioxane with 18 W CFL, and lactones by using DMF with 8 W green LEDs, respectively. A plausible mechanism was proposed based on control experiments
通过可见光光催化双碳-碳键断裂和多碳-氢键氧化,独特地进行了伯胺的无金属好氧氧化。通过使用具有18 W CFL的二恶烷,可以控制伯胺的好氧氧化,以提供酸;通过使用具有8 W绿色LED的DMF,可以分别控制内酯的内酯。在控制实验的基础上,提出了一个合理的机制。该观察结果为脂肪族伯胺的好氧氧化中的碎片化提供了直接证据。
Calcium iodide catalyzed photooxidative oxylactonization of oxocarboxylic acids using molecular oxygen as terminal oxidant
We developed aerobic photooxidative oxylactonization of oxocarboxylic acids catalyzed by calcium iodide using molecular oxygen as the terminal oxidant under photo irradiation. (C) 2012 Elsevier Ltd. All rights reserved.