18366-49-9Relevant articles and documents
Iron-mediated intermolecular N-group transfer chemistry with olefinic substrates
Hennessy, Elisabeth T.,Liu, Richard Y.,Iovan, Diana A.,Duncan, Ryan A.,Betley, Theodore A.
, p. 1526 - 1532 (2014/03/21)
The dipyrrinato iron catalyst reacts with organic azides to generate a reactive, high-spin imido radical intermediate, distinct from nitrenoid or imido species commonly observed with low-spin transition metal complexes. The unique electronic structure of
Regioselective synthesis of 5-aryl-2-oxazolidinones from carbon dioxide and aziridines using Br- Ph3+PPEG 600P+Ph3Br- as an efficient, homogenous recyclable catalyst at ambient conditions
Watile, Rahul A.,Bagal, Dattatraya B.,Patil, Yogesh P.,Bhanage, Bhalchandra M.
, p. 6383 - 6387 (2011/12/22)
Polyethylene glycol functionalized phosphonium salt (Br- Ph 3+PPEG600P+Ph3Br -) was found to be an efficient, homogenous, recyclable catalyst for coupling of CO2 with a variety of aziridines producing corresponding 5-aryl-2-oxazolidinones with good yields and excellent regioselectivity under relatively mild and solvent free conditions. Furthermore, the catalyst was effectively recycled for four consecutive cycles without any significant loss in its catalytic activity and selectivity.
Lewis basic ionic liquids-catalyzed synthesis of 5-aryl-2-oxazolidinones from aziridines and CO2 under solvent-free conditions
Yang, Zhen-Zhen,He, Liang-Nian,Peng, Shi-Yong,Liu, An-Hua
supporting information; experimental part, p. 1850 - 1854 (2011/02/23)
A series of easily prepared Lewis 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 recycled over four times without appreciable loss of catalytic activity. The effects of the catalyst structure and various reaction parameters on the catalytic performance were investigated in detail. This protocol was found to be applicable to a variety of aziridines producing the corresponding 5-aryl-2-oxazolidinones in good yields and excellent regioselectivities. Therefore, this solvent-free process thus represents an environmentally friendly process for ionic liquid-catalyzed conversion of CO2 into value-added chemicals. A possible catalytic cycle for CO2 activation induced by nucleophilic tertiary nitrogen of the ionic liquid was proposed, based on studies using in situ FT-IR spectroscopy under CO2 pressure.