作者:V. Mamane、P. Peluso、E. Aubert、S. Cossu、P. Pale
DOI:10.1021/acs.joc.6b00413
日期:2016.6.3
Finkelstein reaction (Buchwald procedure) performed on 2,2′-dibromo derivatives. Selected compounds of this new family of atropisomeric 4,4′-bipyridines were enantioseparated by high performance liquid chromatography on chiral stationary phases, and the absolute configurations of the separated enantiomers were assigned by using X-ray diffraction analysis. The latter revealed that various halogen bond
描述了通过两种互补方法制备手性六卤代-4,4'-联吡啶的27种异构体。第一种是收敛的,基于LDA诱导的三卤代吡啶的4,4'-二聚,而第二种方法是分歧的,是通过4,4'-联吡啶-2,2'-二酮的区域选择性卤化反应实现的。通过对2,2′-二溴衍生物进行的铜催化的Finkelstein反应(Buchwald方法)引入4,4′-联吡啶的2,2′-位处的碘。通过手性固定相上的高效液相色谱对映这种新的对映异构体4,4'-联吡啶家族的选定化合物,对映体分离,并使用X射线衍射分析确定分离的对映体的绝对构型。