Enantioselective addition of phenylacetylene to aldehydes catalyzed by a d-glucosamine-derived sulfonamide–titanium complex
作者:Tomasz Bauer、Sławomir Smoliński、Przemysław Gaweł、Janusz Jurczak
DOI:10.1016/j.tetlet.2011.07.051
日期:2011.7
ligands in titanium tetraisopropoxide promoted enantioselective addition of phenylacetylene to benzaldehyde and selected aromatic and aliphatic aldehydes. The N-3,5-bis(trifluoromethyl)benzenesulfonamido-d-glucosamine derivative was chosen as the most efficient ligand for this addition. The reaction is highly enantioselective for several aromatic aldehydes and enantiomeric excesses up to 92% were obtained
我们提出了从d-葡萄糖胺衍生的β-羟基磺酰胺的合成及其在四异丙醇钛中作为配体的应用,促进了苯乙炔对苯甲醛的对映选择性加成,以及选定的芳族和脂族醛。所述Ñ -3,5-二(三氟甲基)苯磺酰氨基-d葡糖胺衍生物被选择作为最有效的配体这种添加。该反应对于几种芳族醛是高度对映选择性的,并且得到高达92%的对映体过量。