Electrochemical Ring-Opening Dicarboxylation of Strained Carbon–Carbon Single Bonds with CO<sub>2</sub>: Facile Synthesis of Diacids and Derivatization into Polyesters
a novel electrochemical ring-opening dicarboxylation of C─C single bonds in strained rings with CO2. Structurally diverse glutaric acid and adipic acid derivatives were synthesized from substituted cyclopropanes and cyclobutanes in moderate to high yields. In contrast to oxidative ring openings, this is also the first realization of an electroreductive ring-openingreaction of strained rings, including
二酸是聚合物工业中用于构建有价值材料的重要单体。用CO 2对不饱和键(例如烯烃和炔烃)进行二羧化已被证明是一种很有前途的合成方法。然而,C─C 单键与 CO 2的二羧化作用很少被研究。在此,我们报道了一种新的电化学开环二羧化 C─C 单键在应变环中与 CO 2. 由取代的环丙烷和环丁烷以中等至高产率合成结构多样的戊二酸和己二酸衍生物。与氧化开环相比,这也是应变环(包括商业化环)的电还原开环反应的首次实现。对照实验表明,自由基阴离子和碳负离子可能是该反应的关键中间体。此外,该工艺具有步骤和原子经济性高、反应条件温和(1 atm,室温)、良好的化学选择性和官能团耐受性、电解质浓度低、产物易于衍生等特点。此外,
Controlling the Assembly of C2-Symmetric Molecular Tectons Using a Thiocarbamate Appended Carbocyclic Cleft Molecule Analogous to Tröger’s Base
作者:Natasha H. Slater、Benjamin R. Buckley、Mark R. J. Elsegood、Simon J. Teat、Marc C. Kimber
DOI:10.1021/acs.cgd.6b00388
日期:2016.7.6
By way of appending the C2-symmetric carbocyclic cleft diol with thiocarbamates with varying substituents, significant control of the hydrogen bonded network can be achieved. Smaller alkyl substituents lead to the formation of stacked columns of components with the apex of one molecule suitably aligned in the cleft of a second. Aryl substituents, however, lead to the formation of ribbons via an H-bonding
Photocatalytic dicarboxylation of strained C C bonds with CO2 via consecutive visible-light-induced electron transfer
作者:Yi Liu、Zhe-Hao Wang、Guan-Hua Xue、Lin Chen、Li-Hua Yuan、Yi-Wen Li、Da-Gang Yu、Jian-Heng Ye
DOI:10.1016/j.cclet.2023.109138
日期:2024.6
recently emerged as an efficient and sustainable strategy to generate dicarboxylic acids. However, photocatalytic dicarboxylation with CO is mainly limited to unsaturated bonds, and the dicarboxylation of CC single bonds still remains a challenge. Herein, we report a photocatalytic dicarboxylation of CC single bonds in strained rings with CO units consecutive photo-induced electron transfer (ConPET). It