Unusual Missing Linkers in an Organosulfonate-Based Primitive–Cubic (pcu)-Type Metal–Organic Framework for CO<sub>2</sub> Capture and Conversion under Ambient Conditions
作者:Guiyang Zhang、Huimin Yang、Honghan Fei
DOI:10.1021/acscatal.7b04189
日期:2018.3.2
organosulfonate-based metal–organicframework (MOF) with a defective primitive–cubic (pcu) topology was successfully synthesized. The unusual missing linkers, along with the highest permanent porosity (∼43%) in sulfonate-MOFs, offer a versatile platform for the incorporation of alkynophilic Ag(I) sites. The cyclic carboxylation of alkyne molecules (e.g., propargyl alcohol and propargyl amine) into α-alkylidene
An alkaline-resistant Ag(<scp>i</scp>)-anchored pyrazolate-based metal–organic framework for chemical fixation of CO<sub>2</sub>
作者:Huimin Yang、Xu Zhang、Guiyang Zhang、Honghan Fei
DOI:10.1039/c8cc01461b
日期:——
An alkaline-resistant Ag(i)-anchored metal–organic framework has been achieved via postsynthetic modification of pyrazolate-based linkers.
一种耐碱性的Ag(i)锚定金属有机框架已经通过对基于吡唑酮的连接剂进行后合成修饰而实现。
Synthesis of Oxazolidinones by Efficient Fixation of Atmospheric CO<sub>2</sub>with Propargylic Amines by using a Silver/1,8-Diazabicyclo[5.4.0]undec-7-ene (DBU) Dual-Catalyst System
This'll fix it: Efficientfixation of atmospheric CO2 has been achieved by the reaction of propargylicamines with a silver/DBU dual‐catalyst system (see scheme). Various oxazolidinones were synthesized in moderate to good yields by using substituted propargylicamines.
By employing only silica as a catalyst, the carboxylative cyclization of a propargylicamine with CO2 proceeded to afford the corresponding 2-oxazolidinone. MCM-41, which was a mesoporous silica, was found to be the most effective silica for this purpose. Moreover, after the reaction, the MCM-41 catalyst was recovered by filtration and could be reused over ten times without deactivation.
Quaternary ammonium salt-catalyzed carboxylative cyclization of propargylic amines with CO2
作者:Akira Fujii、Jun-Chul Choi、Ken-ichi Fujita
DOI:10.1016/j.tetlet.2017.10.016
日期:2017.11
By employing quaternary ammonium salts as catalysts, the carboxylative cyclization of the propargylicamines with CO2 proceeded to afford the corresponding 2-oxazolidinones. In particular, tetra-n-butylammonium fluoride was the most effective catalyst for the reaction, providing a 2-oxazolidinone derivative in a maximum chemical yield of 99%. From a screening of the structure of a catalyst, it was