reveal that 1 can efficiently catalyze the cycloaddition of propargylic amines with CO2 , exclusively affording various 2-oxazolidinones under mild conditions. It is the first eco-friendly noble-metal-free MOFs catalyst for the cyclization of propargylic amines with CO2 . DFT calculations uncover that ZnII ions can efficiently activate both C≡C bonds of propargylic amines and CO2 by coordination interaction
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
Efficient and Recyclable Cobalt(II)/Ionic Liquid Catalytic System for CO
<sub>2</sub>
Conversion to Prepare 2‐Oxazolinones at Atmospheric Pressure
作者:Zhi‐Hua Zhou、Kai‐Hong Chen、Liang‐Nian He
DOI:10.1002/cjoc.201900346
日期:2019.12
propargylic amine and CO2 to prepare 2‐oxazolinones. In this protocol, various propargylic amines were successfully transformed into the corresponding 2‐oxazolinones with CoBr2 and diethylimidazolium acetate ([EEIM][OAc]) as the catalyst under atmospheric CO2 pressure. It is worthnoting that the turnover number (TON) of this transformation can be up to 1740, presumably being attributed to the cooperative
Expanded Ring NHC Silver Carboxylate Complexes as Efficient and Reusable Catalysts for the Carboxylative Cyclization of Unsubstituted Propargylic Derivatives
作者:Alejandro Cervantes‐Reyes、Tobias Saxl、Philipp M. Stein、Matthias Rudolph、Frank Rominger、Abdullah M. Asiri、A. Stephen K. Hashmi
DOI:10.1002/cssc.202002822
日期:2021.6.8
α-methylene cyclic carbonates. Derivedfrom X-ray diffraction studies, the molecular geometry and the concept of buried volume were employed to describe the structural and steric features of these silver complexes. Their stability and efficiency as catalysts have been demonstrated by the synthesis of 29 carboxylation products (72–98 % yield) at low catalyst loadings (0.01–1.5 mol%). Characteristics are high