P-BEMP: A New Efficient and Commercially Available User-Friendly and Recyclable Heterogeneous Organocatalyst for the Michael Addition of 1,3-Dicarbonyl Compounds
Michaeladdition of 1,3-dicarbonyls with various Michael acceptors has been found to be catalyzed by commercially available, user-friendly and recyclable N-phenyl-tris(dimethylamino)iminophosphorane immobilized on polystyrene resin (P-BEMP). The reaction does not require anhydrous solvents or inert atmosphere and proceeds smoothly at room temperature leading to the corresponding adducts, which can
Intramolecular reductive coupling reactions promoted by samarium diiodide
作者:Gary A. Molander、Caryn Kenny
DOI:10.1021/ja00203a027
日期:1989.10
Samariumdiiodide is a useful reagent for promoting intramolecular reductive coupling reactions, generating functionalized carbocycles. Ketone-olefin coupling, pinacolic coupling, and other related reductive coupling reactions are accomplished under mild conditions with samariumdiiodide. Products are accessed in high yield, and in many cases excellent stereochemical control is achieved at three contiguous