Relay Catalysis Using a Rhodium Complex/Chiral Brønsted Acid Binary System: Enantioselective Reduction of a Carbonyl Ylide as the Reactive Intermediate
作者:Masahiro Terada、Yasunori Toda
DOI:10.1002/anie.201107805
日期:2012.2.27
Pass the baton: A one‐pot relay catalysis for a carbonyl ylide formation/enantioselective reduction sequence using a dirhodium(II) tetracarboxylate and chiral phosphoric acid catalyst system is described. The four‐step transformation involves a rhodium carbene complex, a carbonyl ylide, and an isobenzopyrylium intermediate, the enantioselective reduction of which yields isochromanone derivatives in
通过指挥棒:描述了使用四羧酸二(II)鎓和手性磷酸催化剂体系对羰基内酯形成/对映选择性还原序列进行单锅接力催化。四步转化涉及铑卡宾络合物,羰基叶立德和异苯并吡啶中间体,对映体的还原反应可高产率,高选择性地生成异苯并二氢吡喃酮衍生物。