Catalytic Asymmetric Construction of Spiro(γ-butyrolactam-γ-butyrolactone) Moieties through Sequential Reactions of Cyclic Imino Esters with Morita-Baylis-Hillman Bromides
作者:Huai-Long Teng、He Huang、Chun-Jiang Wang
DOI:10.1002/chem.201201475
日期:2012.10.1
Spiro(γ‐butyrolactam‐γ‐butyrolactone): A route to enantioenriched spiro(γ‐butyrolactam‐γ‐butyrolactone) compounds, a valuable motif for drug discovery, was developed by use of a highly efficient copper(I)/TF‐BiphamPhos‐catalyzed tandem Michael addition–elimination of homoserine lactone derived cycliciminoesters with Morita–Baylis–Hillman (MBH) bromides, followed by treatment with para‐toluenesulfonic