A robust and recyclable polyurea-encapsulated copper(<scp>i</scp>) chloride for one-pot ring-opening/Huisgen cycloaddition/CO<sub>2</sub> capture in water
The multicomponent ring-opening/Huisgen cycloaddition reactions combined with CO2 capture with polyurea-encapsulated copper salt as catalyst that in-situ formed from simple CuCl and soluble polyurea during the reaction were carried out...
Zirconium dodecyl sulfate [Zr(DS) 4 ] is an efficientcatalyst for the aminolysis of epoxides in water at pH 5.0. Epoxides and anilines were used and the corresponding β-amino alcohols were isolated in generally high regioselectivity and excellent yields.
method using diaryl ditelluride. Further, monotellurides were converted into corresponding tellurium cations. Next, these Lewis acidic tellurium cations were used as catalysts to synthesize 1,2-dihydroquinolines from anilines and highly regioselective creation of β-aminoalcohols from epoxides.
Efficient ring opening of epoxides with aromatic amines catalyzed by ZrO(OTf)(2) is reported, and the corresponding beta amino (beta-amino acid) alcohols were obtained in high yields in CH3CN as solvent. The reactions were carried out at room temperature and in the presence of only 1.25 mol% of ZrO(OTf)(2). This catalyst can be reused several times without loss of its activity.
Kinetic resolution of <i>N</i>-aryl β-amino alcohols <i>via</i> asymmetric aminations of anilines
作者:Zheng Guo、Jinglei Xie、Tao Hu、Yunrong Chen、Houchao Tao、Xiaoyu Yang
DOI:10.1039/d1cc03117a
日期:——
An efficientkineticresolution of N-aryl β-amino alcohols has been developed via asymmetric para-aminations of anilines with azodicarboxylates enabled by chiral phosphoric acid catalysis. Broad substrate scope and high kineticresolution performances were afforded with this method. Control experiments supported the critical roles of the NH and OH group in these reactions.