Combining Fluorous and Triazole Moieties for the Tagging of Chiral Azabis(oxazoline) Ligands
作者:Ramesh Rasappan、Tobias Olbrich、Oliver Reiser
DOI:10.1002/adsc.200900129
日期:——
New fluorous-tagged azabis(oxazoline) ligands were prepared using the copper-catalyzed azide-alkyne cycloaddition as ligation method. The resulting ligands were tested in copper-catalyzed asymmetric benzoylations (up to 99% ee), nitroaldol (up to 90% ee), and Michael reactions (up to 82% ee). The combination of unpolar fluorinated alkyl chains and polar triazolemoieties imposes properties that are