enantioselective Michael/cyclization domino reaction between 3-amideoxindoles and α,β-unsaturated aldehydes is described. After sequential oxidation with pyridinium chlorochromate, a direct and one-pot preparation of highly sterically hindered spirocyclic oxindole-γ-lactams was achieved in 51–81% yields with 75–97% ee and ≤80/20 dr.
                                    描述了3-酰胺基
吲哚与α,β-不饱和醛之间的第一有机催化对映选择性迈克尔/环化多米诺反应。用
氯铬酸吡啶鎓进行顺序氧化后,可以直接和一锅制备高度受阻的螺环氧
吲哚-γ-内酰胺,收率51-81%,ee为75-97%,dr≤80/ 20。