Synergetic activation of CO₂ by the DBU-organocatalyst and amine substrates towards stable carbamate salts for synthesis of oxazolidinones

Abstract

The development of efficient methodology to transform CO2 into valuable chemicals has attracted increasing attention concerning the challenging issues of CO2-utitlization. Herein, an efficient approach for the preparation of oxazolidinones...

Nitrogen-Rich Porous Organic Polymers with Supported Ag Nanoparticles for Efficient CO2 Conversion

“…To address this issue, the conversion of CO 2 into high-valueadded chemical products at atmospheric pressure is a promising approach, since CO 2 is a sustainable and accessible C 1 feedstock [3]. There have been reports on the conversion of CO 2 into various valuable chemicals, including CO [4,5], CH 4 [6,7], formic acid [8,9], methanol [10,11], cyclic carbonate [12,13], oxazolidinones [14,15], propargylic acid [16,17], etc. Considering the thermodynamic stability and kinetic inertia of CO 2 [18], it is both challenging and groundbreaking to explore catalysts with efficient catalytic activity.…”

Tandem electrocatalytic aziridination – ring expansion of simple aromatic olefins using ammonia and carbon dioxide

“…It is known that 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) can facilitate the uptake of CO 2 into solution and catalyze CO 2 insertion reactions. [73][74][75][76] In our system, however, it did not improve the yield any further (entries 7 and 8) nor did it provide any catalytic effect with shorter reaction times (entry 9). Also, omitting DBU is beneficial for the environmental factor of the telescoped reaction sequence.…”

Facile Multicomponent Synthesis of Oxazolidinones from Primary Amines and Cesium (Hydrogen)Carbonate

“…Quite recently, an analog approach was published for the first time for aliphatic amines. In this procedure, 10 atm of carbon dioxide, DCE, cesium carbonate as a base, and 1,8‐diazabicyclo[5.4.0]undec‐7‐ene (DBU) as a catalyst were used [16] . Finally, aliphatic amines were converted into oxazolidinones based on the usage of 10 atm of carbon dioxide, DCE, and a ruthenium complex catalyst [17] .…”

“…In this procedure, 10 atm of carbon dioxide, DCE, cesium carbonate as a base, and 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) as a catalyst were used. [16] Finally, aliphatic amines were converted into oxazolidinones based on the usage of 10 atm of carbon dioxide, DCE, and a ruthenium complex catalyst. [17] Carbonate salts as C1 feedstock instead of carbon dioxide are known for a long time but have so far only rarely been applied to the synthesis of oxazolidinones.…”