Metal-Free Enantioselective Electrophilic Activation of Allenamides: Stereoselective Dearomatization of Indoles
作者:Ciro Romano、Minqiang Jia、Magda Monari、Elisabetta Manoni、Marco Bandini
DOI:10.1002/anie.201407518
日期:2014.12.8
The effective and unprecedented chiral BINOL phosphoric acid catalyzed (1–10 mol %) dearomatization of indoles through electrophilic activation of allenamides (ee up to 94 %), is documented. Besides the synthesis of 3,3‐disubstituted indolenine cores, a dearomatization/hydrogen transfer cascade sequence is also presented as a new synthetic shortcut toward highly enantiomerically enriched indolines
通过有效的烯丙酰胺(ee最高可达94%)的活化,有效和空前的手性BINOL磷酸催化了吲哚的脱芳香化作用(1-10 mol%)。除了合成3,3-二取代的吲哚烯核心以外,脱芳香化/氢转移级联序列也作为向高度对映体富集的二氢吲哚的新合成捷径。