have been prepared using bis(oxazoline) building blocks either as nucleophiles or as electrophiles in coupling reactions with central aromatic units. This way, a great variety of pentadentate bis(oxazoline) ligands in diastereo- and enantiomerically pure form become readily available, which are useful for the construction of helical metal complexes with predetermined chirality.
使用双(恶唑啉)结构单元作为亲核试剂或亲电试剂,已制备了高度模块化的N,Y,Z,Y,N配体(Y = N,O,S; Z = N,NO,OH,OMe)与中心芳族单元的反应。这样,很容易获得非对映体和对映体纯形式的多种五齿双(恶唑啉)配体,其可用于构建具有预定手性的螺旋金属配合物。
Ready Available Chiral Azapyridinomacrocycles N-Oxides; First Results as Lewis Base Catalysts in Asymmetric Allylation of p-Nitrobenzaldehyde
作者:Maité Sylla-Iyarreta Veitía、Clotilde Ferroud、Mounia Joudat、Mathieu Wagner、Annie Falguières、Alain Guy
DOI:10.3987/com-11-12249
日期:——
We report here the straightforward synthesis of the first series of enantiomerically pure azapyridinomacrocycles N-oxides containing a cyclohexyl chiral moiety. These compounds were readily obtained in good overall yields by a convergent synthesis using natural amino acids as starting building blocks and macrocyclisation as the key step. This method is rapid, efficient and suitable for the introduction of various substituents at the macrocyclic skeleton. Finally, the compounds were tested as organocatalysts for the enantioselective allylation of p-nitrobenzaldehyde with allyltrichlorosilane.