Converting urea into high value-added 2-oxazolidinones under solvent-free conditions
作者:Peixue Wang、Qinghe Li、Shimin Liu、Youquan Deng
DOI:10.1039/c6ra21809a
日期:——
Zn-modified mesoporous Mg–Al nanoplates oxides were prepared by co-precipitation and further characterized and used in the synthesis of 2-oxazolidinones from urea and epoxides undersolvent-freeconditions. The characterization results suggested that Zn1.1Mg2.0AlO4.6, which featured more accessible active medium basic sites, were favorable for obtaining superior catalytic activity. This synthetic process
5-alkoxymethyl or alkenyloxymethyl-2-oxazolidines, particularly those having a long chain alkyl or alkenyl moiety are useful as a internal mold release in the polyurea reaction injection molding technology.
Efficient synthesis of 2-oxazolidinone from epoxides and carbamates with binary Mg Fe oxides as a magnetic solid base catalyst
作者:Jianpeng Shang、Shimin Liu、Liujin Lu、Xiangyuan Ma、Yude He、Youquan Deng
DOI:10.1016/j.catcom.2012.08.006
日期:2012.11
Magnetic binary Mg-Fe oxides were prepared by co-precipitation method, characterized and tested in the synthesis of 2-oxazolidinones from epoxides and carbamates. The catalytic results showed that the catalyst with Mg/Fe molar ratio of 1 and calcined at 400 degrees C exhibited superior catalytic activity. The catalyst could be magnetically separated, recycled and reused for five runs without noticeable deactivation. Under the optimized conditions, various 2-oxazolidinones derivatives were successfully synthesized with good to excellent isolated yields. (C) 2012 Elsevier B.V. All rights reserved.
US5268484A
申请人:——
公开号:US5268484A
公开(公告)日:1993-12-07
Efficient synthesis of 2-oxazolidinones from epoxides and carbamates catalyzed by amine-functionalized ionic liquids
作者:Jianpeng Shang、Zuopeng Li、Caina Su、Yong Guo、Youquan Deng
DOI:10.1039/c5ra09838f
日期:——
A series of amine-functionalized ionicliquids were prepared and their catalytic performance was tested in the synthesis of 2-oxazolidinones from epoxides and carbamates. Under optimized reaction conditions, good to excellent yields of various 2-oxazolidinones were achieved with different epoxides and carbamates. Moreover, the amine-functionalized ionicliquid catalyst could be easily recovered and