HEINE, H. -G.;HARTMANN, W., ANGEW. CHEM., 1981, 93, N 9, 805-806
作者:HEINE, H. -G.、HARTMANN, W.
DOI:——
日期:——
A Practical Synthesis of 3-Acyl Cyclobutanones by [2 + 2] Annulation. Mechanism and Utility of the Zn(II)-Catalyzed Condensation of α-Chloroenamines with Electron-Deficient Alkenes
作者:Jeannette M. O’Brien、Jason S. Kingsbury
DOI:10.1021/jo102257k
日期:2011.3.18
New conditions for the conversion of simple tertiary amides to α-chloroenamines and their use in Zn(II)-catalyzed cycloadditionreactions with commercial α,β-unsaturatedcarbonylcompounds allows rapid, regiocontrolled access to 3-acyl cyclobutanones. Reactions take place at ambient temperature without solvent, giving strained [2 + 2] adducts with all-carbon-substituted quaternary carbon atoms. Ab