An Easy Entry to Optically Active Spiroindolinones: Chiral Brønsted Acid-Catalysed Pictet-Spengler Reactions of Isatins
作者:Sara Duce、Fabio Pesciaioli、Lucia Gramigna、Luca Bernardi、Andrea Mazzanti、Alfredo Ricci、Giuseppe Bartoli、Giorgio Bencivenni
DOI:10.1002/adsc.201100050
日期:2011.4.18
The first catalytic asymmetric Pictet–Spengler reaction of isatins is presented. BINOL‐derived phosphoric acids were found to be competent catalysts for this transformation, giving challenging spirooxindole structures bearing a quaternary stereocentre with generally good results. The 1,2,3,4‐tetrahydro‐β‐carboline products (spiroindolinones) are the core of some newly discovered anti‐malarial agents
介绍了靛红的第一个催化不对称Pictet-Spengler反应。发现由BINOL衍生的磷酸是这种转化的有效催化剂,使具有四级立体中心的具有挑战性的螺并吲哚结构具有良好的效果。1,2,3,4-四氢-β-咔啉产品(螺吲哚酮)是一些新发现的抗疟药的核心。