Lewis basic ionic liquids-catalyzed synthesis of 5-aryl-2-oxazolidinones from aziridines and CO2 under solvent-free conditions
作者:Zhen-Zhen Yang、Liang-Nian He、Shi-Yong Peng、An-Hua Liu
DOI:10.1039/c0gc00286k
日期:——
basic ionic liquids were developed as recyclable and efficient catalysts for selective synthesis of 5-aryl-2-oxazolidinones from aziridines and CO2 without utilization of any organic solvent or additive. Notably, high conversion, chemo- and regio-selectivity were attained when 1-butyl-4-aza-1-azaniabicyclo[2.2.2]octane bromide ([C4DABCO]Br) was used as the catalyst. Furthermore, the catalyst could be
Synthesis of Oxazolidinones by using Carbon Dioxide as a C
<sub>1</sub>
Building Block and an Aluminium‐Based Catalyst
作者:Mani Sengoden、Michael North、Adrian C. Whitwood
DOI:10.1002/cssc.201901171
日期:2019.7.19
Oxazolidinone synthesis through the coupling of carbon dioxide and aziridines was catalysed by an aluminium(salphen) complex at 50–100 °C and 1–10 bar pressure under solvent‐free conditions. The process was applicable to a variety of substituted aziridines, giving products with high regioselectivity. It involved the use of a sustainable and reusable aluminium‐based catalyst, used carbon dioxide as a
N-Heterocyclic Olefins as Robust Organocatalyst for the Chemical Conversion of Carbon Dioxide to Value-Added Chemicals
作者:Vitthal B. Saptal、Bhalchandra M. Bhanage
DOI:10.1002/cssc.201600467
日期:2016.8.9
activity of N‐heterocyclic olefins (NHOs) as a newly emerging class of organocatalyst is investigated for the chemical fixation of carbondioxide through reactions with aziridines to form oxazolidinones and the N‐formylation of amines with polymethylhydrosiloxane (PMHS) or 9‐borabicyclo[3.3.1]nonane (9‐BBN) as the reducing agent under mild conditions. The exocyclic carbon atoms of NHOs are highly nucleophilic
Zirconyl chloride: an efficient recyclable catalyst for synthesis of 5-aryl-2-oxazolidinones from aziridines and CO2 under solvent-free conditions
作者:Ying Wu、Liang-Nian He、Ya Du、Jin-Quan Wang、Cheng-Xia Miao、Wei Li
DOI:10.1016/j.tet.2009.05.034
日期:2009.8
Zirconyl chloride was found to be an efficient catalyst for the cycloaddition reaction of aziridines with CO2, thus leading to the preferential formation of 5-aryl-2-oxazolidinones undersolvent-freeconditions. The methodology could be extended to various substituted aziridines with high conversion and chemo-, regio-, and stereoselectivity. Furthermore, the catalyst could be reused over five times
Proline-Catalyzed Synthesis of 5-Aryl-2-oxazolidinones from Carbon Dioxide and Aziridines Under Solvent-Free Conditions
作者:Xiao-Yong Dou、Liang-Nian He、Zhen-Zhen Yang
DOI:10.1080/00397911.2010.521903
日期:2012.1.1
Natural alpha-amino acids were proven to be ecofriendly and recyclable catalysts for the carboxylation of aziridines with CO2 without utilization of any organic solvents or additives. Notably, a series of 5-aryl-2-oxazolidinones were obtained in good yield together with excellent chemo- and regioselectivity under mild conditions using proline as the catalyst. Notably, the catalyst could be recycled more than five times after a simple separation procedure without appreciable loss of catalytic activity. This process represents a promising strategy for homogeneous catalyst recycling.