Dy(OTf)3/Pybox-catalyzed enantioselective Friedel–Crafts alkylation of indoles with α,β-unsaturated trifluoromethyl ketones
作者:Shigeru Sasaki、Takayasu Yamauchi、Kimio Higashiyama
DOI:10.1016/j.tetlet.2010.02.121
日期:2010.4
The first catalytic enantioselective Friedel–Crafts alkylation of indoles with α,β-unsaturated trifluoromethyl ketones has been accomplished. The reaction was achieved in the presence of the Dy(OTf)3/Pybox complex, producing the desired products in high yields (up to 99%) with good enantioselectivities (up to 86% ee). The absolute stereochemistry of the resulting adducts was determined by X-ray analysis
用α,β-不饱和三氟甲基酮对吲哚进行的首个催化对映选择性Friedel-Crafts烷基化反应已经完成。该反应是在Dy(OTf)3 / Pybox络合物存在下完成的,以高收率(最高99%)和良好的对映选择性(最高86%ee)生产出所需的产物。通过X射线分析确定所得加合物的绝对立体化学。