Chiral thiazoline ligands: application in Pd-catalysed allylic substitution
摘要:
A series of thiazoline ligands, analogues of well-known oxazolines, easily prepared from chiral aminoalcohols, and appropriate dithioesters, was tested in the Pd-catalysed allylic substitution. A systematic comparison with the corresponding oxazolines (using literature data or our own tests) has been made for each case. Some important differences (between their catalytic activity and enantioselectivity) were noted for the two types of ligands, especially in the case of bis(thiazolines) and bis(oxazolines). (C) 2004 Elsevier Ltd. All rights reserved.
Catalytic Enantioselective Additions of Indoles to Nitroalkenes
作者:Madhu Ganesh、Daniel Seidel
DOI:10.1021/ja8063292
日期:2008.12.10
A new design principle that provides access to more active thiourea catalysts is described. Highly enantioselective additions of indoles to nitroalkenes are reported using a new quinolinium thioamide catalyst.