Enantioselective Morita−Baylis−Hillman Reaction of Isatins with Acrylates: Facile Creation of 3-Hydroxy-2-oxindoles
作者:Fangrui Zhong、Guo-Ying Chen、Yixin Lu
DOI:10.1021/ol102597s
日期:2011.1.7
amine catalyzed enantioselective Morita−Baylis−Hillman (MBH) reaction of isatins with acrylates has been demonstrated, allowing asymmetric synthesis of biologically significant 3-substituted-3-hydroxy-2-oxindoles in good yields and with excellent enantioselectivities. The C6′−OH group of β-isocupreidine (β-ICD) is believed to facilitate the key proton transfer step in the MBH reaction, via an intramolecular
事实证明,靛红与丙烯酸酯的第一级叔胺催化的对映选择性森田-贝利斯-希尔曼(MBH)反应,可以高收率和优异的对映选择性不对称地合成生物学上重要的3-取代-3-羟基-2-羟吲哚。据信,β-异cup啶核苷(β-ICD)的C6'-OH基团通过分子内质子中继过程促进了MBH反应中关键的质子转移步骤。