The application of cerium(IV) oxide (CeO2) as a neutral and heterogeneous catalyst for aldehyde-induced decarboxylative coupling of L-proline with triethyl phosphite and nitromethane is described. In addition, a [3+2] cycloaddition reaction of the in situ generated 1,3-dipolar intermediate with benzaldehyde in the absence of a nucleophile is also reported. (C) 2012 Published by Elsevier Ltd.
Copper/DIPEA-Catalyzed, Aldehyde-Induced Tandem Decarboxylation–Coupling of Natural α-Amino Acids and Phosphites or Secondary Phosphine Oxides
作者:Dongxu Yang、Depeng Zhao、Lijuan Mao、Linqing Wang、Rui Wang
DOI:10.1021/jo200981h
日期:2011.8.5
copper/DIPEA-catalyzed, aldehyde-induced intermolecular decarboxylative coupling reaction of natural α-amino acids and phosphites or secondary phosphine oxides was developed. In this process, a series of potentially useful ligands for organic synthesis and biologically important unnatural amino acid derivatives (tertiary amino phosphorus compounds) were obtained.