The Assembly of Macrocyclic Bis- and Tetra-β-lactams with Embedded Platinum or Palladium Square-Planar Centers
作者:Daniel Pellico、Mar Gómez-Gallego、Pedro Ramírez-López、María José Mancheño、Miguel A. Sierra、M. Rosario Torres
DOI:10.1002/chem.200900374
日期:2009.7.13
The synthesis, isolation, and full characterization of different types of stable, metal‐assembled macrocyclic β‐lactams are reported. By using adequately functionalized bis‐β‐lactams with defined stereochemistry as building blocks, a series of mono‐ and bimetallic Pd and Pt macrocycles has been prepared in good to quantitative yields. These novel structures combine the β‐lactam moiety with transition‐metal
The Sequential Building of Chiral Macrocyclic Bis-β-Lactams by Double Staudinger-Cu-Catalyzed Azide-Alkyne Cycloadditions
作者:Daniel Pellico、Mar Gómez-Gallego、Pedro Ramírez-López、María José Mancheño、Miguel A. Sierra、M. Rosario Torres
DOI:10.1002/chem.200902685
日期:2010.2.1
A novel approach for the synthesis of macrocyclic bis‐β‐lactams based on the Cu‐catalyzed alkyne–azide cycloaddition (CuAAC) is reported. The procedure is general and allows access to a full range of diastereomerically or enantiomerically pure macrocyclic cavities in good yields. The incorporation of chiral oxazolidinone fragments at C3 in the β‐lactam rings allows the total enantiocontrol of the process