involve the use of toxic isocyanates. Yet, because of the lower reactivity of carbonates versus isocyanates, the synthesis of NIPUs is not straightforward and generally requires the use of a catalyst. Recently, several groups have reported on the use of different ranges of catalysts for promoting the nucleophilic attack of the amine on the carbonate. However, many of these studies involve the use of
Process for Preparing Disubstituted Urea and Carbamate Compounds from Amines, Carbon Dioxide, and Epoxides
申请人:Korea Institute of Industrial Technology
公开号:US20150133676A1
公开(公告)日:2015-05-14
The present disclosure relates to a method for preparing a disubstituted urea and carbamate compounds simultaneously through a one-pot reaction of an amine, carbon dioxide and an alkylene oxide compound in the presence of an ionic liquid-based complex catalyst system containing indium. In accordance with the present disclosure, a disubstituted urea and carbamate compounds can be prepared simultaneously at high yield. In addition, the ionic liquid-based catalyst containing indium according to the present disclosure is economical because it can be reused several times.
CO<sub>2</sub> activation and fixation: highly efficient syntheses of hydroxy carbamates over Au/Fe<sub>2</sub>O<sub>3</sub>
作者:Jianpeng Shang、Xiaoguang Guo、Zuopeng Li、Youquan Deng
DOI:10.1039/c5gc02772a
日期:——
An effective route for the syntheses of hydroxyl carbamates from CO2, epoxides and amines over Au/Fe2O3 was developed. Such a process could fulfill the optimum utilization of CO2, which is of significance from the standpoint of green chemistry and sustainable development.
提出了一种在Au / Fe 2 O 3上由CO 2,环氧化物和胺合成氨基甲酸羟基酯的有效途径。这样的过程可以实现CO 2的最佳利用,这从绿色化学和可持续发展的角度来看具有重要意义。
Urea- and Thiourea-Catalyzed Aminolysis of Carbonates
作者:Marine Blain、Honman Yau、Ludivine Jean-Gérard、Rémi Auvergne、Dominique Benazet、Peter R. Schreiner、Sylvain Caillol、Bruno Andrioletti
DOI:10.1002/cssc.201600778
日期:2016.8.23
The aminolysis of (poly)carbonates by (poly)amines provides access to non‐isocyanate polyurethanes (NIPUs) that are toxic‐reagent‐free analogues of polyurethanes (PUs). Owing to their low reactivity, the ring opening of cyclic carbonates requires the use of a catalyst. Herein, we report that the more available and cheaper ureas could advantageously be used for catalyzing the formation of NIPUs at the
(多)胺对(多)碳酸酯的氨解提供了对非异氰酸酯聚氨酯(NIPU)的利用,这些非异氰酸酯聚氨酯是无毒的聚氨酯类似物(PU)。由于它们的低反应性,环状碳酸酯的开环需要使用催化剂。在本文中,我们报道了更多可得的和便宜的尿素可以有利地用于以硫脲类似物为代价来催化NIPU的形成。此外,我们证明了(硫)脲的中等范围的p K a,并且非取代的取代模式对于控制碳酸盐打开的效率至关重要。
Synthesis of <i>N</i>-[(2-hydroxyethoxy)carbonyl]glycine from carbon dioxide, ethylene oxide, and α-amino acid by ionic gelation of sodium tripolyphosphate (TPP) and spirulina supported on magnetic KCC-1 in aqueous solution
study, a novel ionic gelation (IG) of sodium tripolyphosphate (TPP) and spirulina was prepared that, supported on magnetic fibrous silica nanospheres (Fe3O4/KCC-1/IG), has been developed for the synthesis of N-[(2-hydroxyethoxy)carbonyl]glycine from carbon dioxide, ethylene oxide, and α-amino acid. This morphology ultimately leads to higher catalyticactivity for the KCC-1-supported ionic gelation. The
在这项研究中,制备了一种新的三聚磷酸钠(TPP)和螺旋藻的离子凝胶(IG),并在磁性纤维二氧化硅纳米球(Fe 3 O 4 / KCC-1 / IG)上负载了该化合物,用于合成N -[[(2-羟基乙氧基)羰基]甘氨酸,来自二氧化碳,环氧乙烷和α-氨基酸。这种形态最终导致对KCC-1负载的离子胶凝反应具有更高的催化活性。通过使用TEM,FESEM,VSM,FT-IR,TGA和BET对Fe 3 O 4 / KCC-1 / IG MNP进行了全面表征。我们支持在二氧化硅表面进行离子凝胶化,并使用螺旋藻和TPP作为催化剂。这些观察结果被用于直接和选择性化学固定CO 2的过程中提供高度的CO 2捕获和转化。