Efficient and Reusable Metal-Organic Framework Catalysts for Carboxylative Cyclization of Propargylamines with Carbon Dioxide
作者:Dan Zhao、Xiao-Hui Liu、Chendan Zhu、Yan-Shang Kang、Peng Wang、Zhuangzhi Shi、Yi Lu、Wei-Yin Sun
DOI:10.1002/cctc.201701190
日期:2017.12.20
fix it into valuable chemical products, functionalized dynamic metal–organicframeworks (MOFs) have been utilized not only because of their inherent cavity for accommodating CO2 but also owing to their reversible structural transformations in response to external stimuli for regulating the reaction. Herein, we report a dynamic and functional MOF [Cd3(L)2(BDC)3]2⋅16 DMF (MOF‐1 a; DMF=N,N‐dimethylformamide)
Valorization of CO<sub>2</sub>: Preparation of 2-Oxazolidinones by Metal–Ligand Cooperative Catalysis with SCS Indenediide Pd Complexes
作者:Paul Brunel、Julien Monot、Christos E. Kefalidis、Laurent Maron、Blanca Martin-Vaca、Didier Bourissou
DOI:10.1021/acscatal.7b00209
日期:2017.4.7
secondary propargylamines bearing tertiaryalkyl groups at nitrogen, primary propargylamines, and propargylanilines. Thorough experimental (NMR) and computational (DFT) investigations were undertaken to gain mechanistic insights. Accordingly, (i) the resting state of the catalytic cycle is a Pd DMSO complex; (ii) the indenediide backbone and Pd center act in concert to activate the carbamic acid intermediate
捕获和利用CO 2制备高价值化合物在化学上是非常有吸引力的,在社会上是非常合乎需要的。此处显示的基于茚二酮的Pd SCS钳形配合物可在温和的条件下(0.5-1 bar CO 2)促进炔丙基胺的羧基环化反应,生成2-恶唑烷酮,DMSO,40–80°C,1-5 mol%的Pd负载)。茚二酮Pd配合物与已知的催化剂竞争。事实证明,它可用于各种炔丙基胺,包括迄今具有挑战性的底物,例如在氮原子上带有叔烷基的仲炔丙基胺,伯炔丙基胺和炔丙基苯胺。进行了彻底的实验(NMR)和计算(DFT)研究,以获取机械方面的见解。因此,(i)催化循环的静止状态是Pd DMSO络合物;(ii)茚二酮主链和Pd中心共同作用以激活氨基甲酸中间体并促进其环化;(iii)质子穿梭对于降低初始胺羧化的活化势垒以及在Pd的配体主链与有机片段之间的质子转移是必不可少的。
A green approach for the synthesis of 2-oxazolidinones using gold(I) complex immobilized on KCC-1 as nanocatalyst at room temperature
Construction of the Oxazolidinone Framework from Propargylamine and CO<sub>2</sub>
in Air at Ambient Temperature: Catalytic Effect of a Gold Complex Featuring an L<sub>2</sub>
/Z-Type Ligand
The carboxylation of propargylamines with aerial CO2 at room temperature to form 5‐methyleneoxazolidin‐2‐one derivatives has been developed by using a gold catalyst featuring a Z‐type ligand.