作者:Felix Mühlhaus、Hendrik Weißbarth、Tobias Dahmen、Gregor Schnakenburg、Andreas Gansäuer
DOI:10.1002/anie.201908860
日期:2019.10
A titanocene-catalyzed regiodivergent radical arylation is described that allows access to either enantiomerically pure tetrahydroquinolines or indolines from a common starting material. The regioselectivity of epoxide opening that results in the high selectivity of heterocycle formation is controlled by two factors, the absolute configuration of the enantiopure ligands of the (C5 H4 R)2 TiX2 catalyst
描述了钛茂催化的区域发散性自由基芳基化,其允许从常见的起始原料获得对映体纯的四氢喹啉或二氢吲哚。导致杂环形成的高选择性的环氧化物开口的区域选择性受两个因素控制,(C5 H4 R)2 TiX2催化剂的对映体纯配体的绝对构型和无机配体X(X = Cl,OTs)。整个反应是原子经济的,并构成了自由基的Friedel-Crafts烷基化反应。