Palladium-Catalyzed Synthesis of N-Aryloxazolidinones from Aryl Chlorides
摘要:
An efficient method for intermolecular N-arylation of oxazolidinones using Pd(2)dba(3) and various phosphine ligands in the presence of a weak base is reported. The conditions allow the use of cheaper aryl chlorides containing functionalities such as enolizable ketones, amides, etc., which would be incompatible with other coupling methods. The coupling reaction can be used to prepare enantiopure N-aryl beta-amino alcohols. Depending on the stereoelectronic nature of the aryl chloride, careful choice of ligand was necessary for the success of these reactions.
Magnetic Nano Fe3O4 Catalyzed Solvent-Free Stereo- and Regioselective Aminolysis of Epoxides by Amines; a Green Method for the Synthesis of β-Amino Alcohols
作者:Srinivasarao Babu、Amit Kumar、Ramarao Parella
DOI:10.1055/s-0033-1340844
日期:——
We report the use of magnetic nano Fe3O4 as a mild heterogeneous catalyst for the aminolysis of epoxides with amines. The approach constitutes a green method for the formation of a variety of β-amino alcohols with very high stereo- and regioselectivity under solvent-free and ambient reaction conditions. The aminolysis of chiral epoxides with amines gave the corresponding chiral β-amino alcohols with
Asymmetric opening of styrene oxide with p-toluidine catalyzed by BINOL polyols and their lithium complexes
作者:Yu. N. Belokon’、V. I. Maleev、M. A. Moskalenko、Yu. V. Samoilichenko、A. S. Peregudov、A. T. Tsaloev
DOI:10.1007/s11172-013-0195-x
日期:2013.6
Opening of racemic styreneoxide with p-toluidine catalyzed by chiral BINOL-derived polyols proceeded regioselectively mainly with the formation of 2-phenyl-2-(p-tolylamino)-ethanol with low ee values.
由手性 BINOL 衍生的多元醇催化的外消旋氧化苯乙烯与对甲苯胺的开环主要是区域选择性地进行,主要是形成具有低 ee 值的 2-苯基-2-(对甲苯基氨基)-乙醇。